NTCG203NH103JTDS

March 2017 

Temperature protection device 

## Chip NTC thermistor 

Automotive grade:Corresponding to 125,150°C 

## NTCG series 

**NTCG 1005 JIS 1005 [EIA 0402] NTCG 1608 JIS 1608 [EIA 0603]** 

(2/17) 

## **REMINDERS FOR USING THESE PRODUCTS** 

Before using these products, be sure to request the delivery specifications. 

## **SAFETY REMINDERS** 

Please pay sufficient attention to the warnings for safe designing when using this products. 

## **REMINDERS** 

Please pay careful attention to the precautions and follow safe designing practices when using these products. Incorrect usage may lead to destroyed NTC thermistors and damages or malfunctions with the devices used. 

Please use them within the ranges of the ratings and performance provided in the catalog and delivery specifications upon confirming the environments where they are to be used and installed. 

Do not use them outside the operating temperature range. 

Do not use them with the ratings or maximum permissible power levels exceeded. 

- Do not quickly apply 5mW or more of load with the constant-voltage power supply in the NTC thermistor as this may lead to staying in thermal runaway mode or the red-shorting of chips. 

- Please be cautious of the applied voltage in thermistors as instruments may malfunction with the lowering of resistance due to self heating. 

With instruments that consumers can touch the thermistors with their hands, please carefully warn them not to touch the thermistors. Store them in locations where the temperature is 10°C to +40°C and the relative humidity is 75% or below, avoid environments where there are sudden changes in temperatures, direct sunlight, corrosive gas, grit, or dust, and keep them packed in a manner where no loading stress is applied in order to avoid deterioration and damage. (please use them within six months.) 

- When sealing thermistors, please do so upon first considering the type, quantity, hardening conditions, and adhesiveness of the sealing material and confirming its reliability. 

Avoid powerful vibrations, impact (such as by dropping), pressure, etc. on thermistors that exceed the prescribed levels. 

- Do not use them for long periods of time in environments with a relative humidity of over 85%. (this excludes cases where countermeasures have been taken.) 

Do not use them in the following environments. (this excludes cases where countermeasures have been taken.) 

- Corrosive gases (Cl2, NH3, SOx, NOx, etc.) 

- ・Environments with highly conductive substances (electrolytes, water, saltwater, etc.) 

- ・Environments with acid, alkali, or organic solvents 

- ・Dusty areas 

Please observe the following precautions when attaching them to substrates as failure to do so may result in destruction or malfunction. 

- ・Do not let the substrates get warped or twisted at any time during the soldering. 

- ・The landing size must be even on both the left and right sides. 

- ・Do not use items that have been dropped or detached. 

- ・Do not allow the adherence of more solder than needed. 

Reflow mounting is recommended with NTC thermistors, and not flow (dip) mounting. 

- Attaching or making corrections with a soldering iron is not recommended as it can lead to troubles such as significant distorting due to thermal shock or cracking. If a soldering iron must be used, it should be 30W or below with the temperature of the tip at 350°C or below, and at a maximum of 5 seconds of soldering time. Also, do not let the tip of the soldering iron come in direct contact with the chips. 

Please use a substance such as resin that does not generate hydrogen (H2) when forming insulation film over chips. 

- Please contact our sales offices when considering the use of the products listed on this catalog for applications, whose performance and/or quality require a more stringent level of safety or reliability, or whose failure, malfunction or trouble could cause serious damage to society, person or property ('specific uses' such as automobiles, airplanes,medical instruments, nuclear devices, etc.) as well as when considering the use for applications that exceed the range and conditions of this catalog. 

Please note that we are not responsible for any damages or losses incurred resulting from the use of these products that exceeds the range and conditions of this catalog or specific uses. 

Please take appropriate measures such as acquiring protective circuits and devices that meet the uses, applications, and conditions of the instruments and keeping backup circuits. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(3/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Overview of the NTCG series** 

## **CHARACTERISTICS OF NTC THERMISTORS** 

NTC(Negative Temperature Coefficient) thermistors are manufactured from sintered metal oxides. Each thermistor consists of a combination of two to four of the following materials: manganese, nickel, cobalt and copper. NTC thermistors are semiconductor resistors that exhibit decreasing resistance characteristics with increasing temperature. TDK thermistors have low thermal time constants which result in extremely high rates of resistance change to accurately track the temperature. 

## **FEATURES OF NTCG SERIES** 

The line-up corresponding to 125 °C is expanded. The line-up corresponding to 150 °C is added. AEC-Q200 compliant. 

## **Fig.1 R-T Curve : 10kohm@25** °C 

**==> picture [207 x 224] intentionally omitted <==**

**----- Start of picture text -----**<br>
1000<br>_——a<br>——<_—————<br>100<br>Ad<br>———<br>10<br>Af<br>——————<br>1<br>|NI|<br>——————————<br>0.1 es<br>–40 0 50 100 150 200<br>Temperature (°C)<br>)Ω<br>Resistance (k<br>**----- End of picture text -----**<br>


## **Fig.2 Internal structure of the multilayer chip Thermistors** 

**==> picture [169 x 268] intentionally omitted <==**

**----- Start of picture text -----**<br>
①<br>\<br>②<br>⑤ ③<br>④<br>No. Name<br>① Semiconductor ceramics<br>② Internal electrode (Pd)<br>③ Ag<br>④ Terminal electrode Ni<br>⑤ Sn<br>**----- End of picture text -----**<br>


O RoHS Directive Compliant Product: See the following for more details.https://product.tdk.com/info/en/environment/rohs/index.html 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(4/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Overview of the NTCG series** 

## **APPLICATIONS** 

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V2X<br>LED<br>**----- End of picture text -----**<br>


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LED<br>BMS<br>**----- End of picture text -----**<br>


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|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|Use circuit|Temperature compensation for various types of|
|BMS|V2X|LED|
|ob|example|circuits|
|Power|
|LL|Amp|SN|
|Circuit|Vout|TL|Vout|Vout|
|example|Vout|
|ee|O|b|
|Resistance|
|2.2k||22k||4.7k||10k||68k||100k||
|(R25)|
|B constant|
|4000K to 4550K|4000K to 4550K|4000K to 4550K|4100K to 4750K|3435K to 4550K|4000K to 4750K|4000K to 4550K|
|(B25/85)|
|NTCG1005|NTCG103JF103|NTCG104BF683|NTCG104EF104|
|Applicable to series|N/A|N/A|N/A|N/A|FTDS|FTDSX|FTDSX|
|automobile|
|NTCG1608|NTCG164BH222|NTCG164LH223|NTCG164BH472|NTCG164BH103|NTCG163JF103|NTCG164KF104|
|(125°C)|N/A|
|series|JTDS|JTDS|JTDS|JTDS|FTDS|FTDS|
|NTCG1005|NTCG103JF103|NTCG104EF104|
|Applicable to series|N/A|N/A|N/A|N/A|FT1S|N/A|FT1SX|
|automobile|
|NTCG1608|NTCG163JF103|NTCG164KF104|
|(150°C)|N/A|N/A|N/A|N/A|N/A|
|series|FT1S|FT1S|

**----- End of picture text -----**<br>


Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(5/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Overview of the NTCG series** 

**PART NUMBER CONSTRUCTION** NTC G ○○ 3E H 101 □ T □□□ ~~ttt~~ **shapes and B Nominal Nominal** ~~tt~~ **Series Structural dimensions B constant resistance resistance Packaging TDK internal code name classification Code constant**[] **tolerance tolerance style (mm) (%) (**  **) (%)** thermistorNTC Multilayer internal 10 1005 F ±1 300 30 D ±0.5 T Taping **DS** 125°C vehicle responseB constant: 25/85°C electroded G chip type NTC thermistor 16 1608 H ±3 101 100 F ±1 B Bulk **DSX**[125°C vehicle response] B constant: 25/50°C (Pb free type) EIA 102 (10001k  ) H ±3 **1S** 150°C vehicle responseB constant: 25/85°C ~~Lr re~~ 103 (1000010k  ) J ±5 ~~pr~~ **1SX** 150°C vehicle responseB constant: 25/50°C  B constant **B constant(K) 2A** 2000 to 2050 3A 3000 to 3050 4A 4000 to 4050 **2B** 2051 to 2100 3B 3051 to 3100 4B 4051 to 4100 **2C** 2101 to 2150 3C 3101 to 3150 4C 4101 to 4150 **2E** 2201 to 2250 3E 3201 to 3250 4E 4201 to 4250 **2F** 2251 to 2300 3F 3251 to 3300 4F 4251 to 4300 **2J** 2401 to 2450 3J 3401 to 3450 4J 4401 to 4450 **2K** 2451 to 2500 3K 3451 to 3500 4K 4451 to 4500 **2L** 2501 to 2550 3L 3501 to 3550 4L 4501 to 4550 **2N** 2601 to 2650 3N 3601 to 3650 4N 4601 to 4650 **2Q** 2701 to 2750 3Q 3701 to 3750 4Q 4701 to 4750 **2S** 2801 to 2850 3S 3801 to 3850 4S 4801 to 4850 

B constant calculation formula 

InR1–InR2 B= – (1/T1) (1/T2) 

B: B constant (K) 

T1:Arbitrary temperature (K) 

T2:Arbitrary temperature different from T1 (K) 

R1:Zero-load resistance value at temperature T1(  ) 

R2:Zero-load resistance value at temperature T2(  ) 

Each temperature is measured in absolute temperature. 0°C=273.15K 

|||||Dimensions in mm|
|---|---|---|---|---|
|**Shape symbol(JIS)**|**L**|**W**|**T**|**L1, L2**|
|1005|1.00±0.05|0.50±0.05|0.50±0.05|0.1min|
|1608|1.60±0.10|0.80±0.10|0.80±0.10|0.2min|



Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(6/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Characteristic map of NTCG series** 

|**125°C RESPONSE COUNTERPARTS**<br>**Resistan**<br>**Dimensi**<br>**Thickness**<br>**B constant**<br>**Catalog number**<br>~~Me~~|**125°C RESPONSE COUNTERPARTS**<br>**Resistan**<br>**Dimensi**<br>**Thickness**<br>**B constant**<br>**Catalog number**<br>~~Me~~|**125°C RESPONSE COUNTERPARTS**<br>**Resistan**<br>**Dimensi**<br>**Thickness**<br>**B constant**<br>**Catalog number**<br>~~Me~~|**125°C RESPONSE COUNTERPARTS**<br>**Resistan**<br>**Dimensi**<br>**Thickness**<br>**B constant**<br>**Catalog number**<br>~~Me~~||||
|---|---|---|---|---|---|---|
|**ce**<br>**ons**|**(mm)**|**[25/ 85°C]**<br>**[25/ 50°C]**|**Resistance tolerance : ± 0.5%**|**Resistance tolerance : ± 1%**|**Resistance tolerance : ± 3%**|**Resistance tolerance : ± 5%**|
|100<br>1608|0.8±0.1|3,250K<br>3,244K||NTCG163EH101HTDS|||
|2.2k<br>1608|0.8±0.1|4,100K<br>4,096K||||NTCG164BH222JTDS|
|4.7k<br>1608|0.8±0.1|4,100K<br>4,067K||||NTCG164BH472JTDS|
|1005|0.5±0.05|3,435K<br>3,380K|NTCG103JX103DTDS|NTCG103JF103FTDS|NTCG103JF103HTDS|NTCG103JF103JTDS|
|10k<br>1608|0.8±0.1|3,435K<br>3,380K<br>4,100K<br>4,067K|NTCG163JX103DTDS|NTCG163JF103FTDS|NTCG163JF103HTDS<br>NTCG163JH103HTDS|NTCG164BH103JTDS|
|22k<br>1005<br>1608|0.5±0.05<br>0.8±0.1|4,550K<br>4,485K<br>4,550K<br>4,485K||||NTCG104LH223JTDS<br>NTCG164LH223JTDS|
|47k<br>1005<br>1608|0.5±0.05<br>0.8±0.1|4,550K<br>4,485K<br>4,550K<br>4,485K|||NTCG164LH473HTDS|NTCG104LH473JTDS<br>NTCG164LH473JTDS|
|68k<br>1005|0.5±0.05|4,150K<br>4,085K||NTCG104BF683FTDSX|||
|100k<br>1005<br>1608|0.5±0.05<br>0.8±0.1|4,308K<br>4,250K<br>4,550K<br>4,485K<br>4,485K<br>4,419K<br>4,550K<br>4,485K||NTCG104EF104FTDSX<br>NTCG164KF104FTDS||NTCG104LH104JTDS<br>NTCG164LH104JTDS|
|150k<br>1005<br>1608|0.5±0.05<br>0.8±0.1|4,550K<br>4,485K<br>4,550K<br>4,485K||||NTCG104LH154JTDS<br>NTCG164LH154JTDS|



|**150°C RESPONSE COUNTERPARTS**<br>**Resistan**<br>**Dimensi**<br>**Thickness**<br>**B constant**<br>**Catalog number**<br>~~Bm~~||||
|---|---|---|---|
|**ce**<br>**ons**<br>**(mm)**<br>**[25/ 85°C]**<br>**[25/ 50°C]**<br>**Resistance tolerance : ± 0.5%**|**Resistance tolerance : ± 1%**|**Resistance tolerance : ± 3%**|**Resistance tolerance : ± 5%**|
|10k<br>1005<br>0.5 ± 0.05<br>3,435 K<br>3,380 K<br>1608<br>0.8 ± 0.1<br>3,435 K<br>3,380 K<br>NTCG163JX103DT1S|NTCG103JF103FT1S<br>NTCG163JF103FT1S|||
|100k<br>1005<br>0.5 ± 0.05<br>4,308 K<br>4,250 K<br>1608<br>0.8 ± 0.1<br>4,550 K<br>4,485 K|NTCG104EF104FT1SX<br>NTCG164KF104FT1S|||
|**RATINGS  125°C RESPONSE COUNTERPARTS**<br>~~Oe~~||||
|**Size**<br>mm<br>1005|1608|||
|**Maximum ratedpower(25**°C**)****1**<br>mW<br>100|100|||
|**Dissipation factors(25**°C**) ****2**<br>mW/°C<br>1|1|||



- **1 Maximum rated power** : Maximum power: at rated temperature (25°C), maximum power that can be applied continuously 

 **2** Dissipation factors: powered that it is equivalent that be increased in self-heating by load power thermistor at 1°C temperature 

## **RATINGS  150°C RESPONSE COUNTERPARTS** 

## ~~Oe~~ **RATINGS  150°C RESPONSE COUNTERPARTS** 

|**Size**|mm|1005|1608|
|---|---|---|---|
|**Maximum ratedpower(25**°C**)****1**|mW|125|125|
|**Dissipation factors(25**°C**) ****2**|mW/°C|1|1|



- **1 Maximum rated power** : Maximum power: at rated temperature (25°C), maximum power that can be applied continuously 

- **2** Dissipation factors: powered that it is equivalent that be increased in self-heating by load power thermistor at 1°C temperature 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(7/17) 

**NTC Thermistors Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **NTCG series  1005 type** 

## **SHAPE & DIMENSIONS** 

## **RECOMMENDED LAND PATTERN** 

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1±0.05<br>**----- End of picture text -----**<br>


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0.5±0.05<br>0.5±0.05<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
0.1 min.<br>**----- End of picture text -----**<br>


Electrode material Internal:Pd External:Ag/Ni/Sn Dimensions in mm 

~~aa~~ 0.35 to 0.45 0.3 to 0.5 0.35 to 0.45 

## **125°C RESPONSE COUNTERPARTS（OPERATING TEMPERATURE RANGE：–40 to 125°C）** 

|**Part No.**<br>**Resistance**|**Part No.**<br>**Resistance**|**Part No.**<br>**Resistance**|**Resistance**|**B constant**|**B constant**|**B constant**|**B constant**|**B constant**|**Permissible**|
|---|---|---|---|---|---|---|---|---|---|
||**[25°C]**||**tolerance**|**[25/50°C]**|**[25/75°C]**|**[25/85°C]**|**[25/100°C]**|**tolerance**|**operating**|
||**(****)**|||**(K)**|**(K)**|**(K)**|**(K)**||**current**|
||||||||||**[25°C]**|
||||||||||**(mA)**|
|NTCG103JF103FTDS||10,000|±1%|3380|3422|3435|3453|±1%|0.31|
|NTCG103JF103HTDS||10,000|±3%|3380|3422|3435|3453|±1%|0.31|
|NTCG103JF103JTDS||10,000|±5%|3380|3422|3435|3453|±1%|0.31|
|NTCG103JX103DTDS||10,000|±0.5%|3380|3422|3435|3453|±0.7%|0.31|
|NTCG104LH223JTDS||22,000|±5%|4485|4533|4550|4573|±3%|0.21|
|NTCG104LH473JTDS||47,000|±5%|4485|4533|4550|4573|±3%|0.14|
|NTCG104BF683FTDSX||68,000|±1%|4085|4134|4150|4172|±1%|0.12|
|NTCG104EF104FTDSX<br>100,000|||±1%|4250|4293|4308|4327|±1%|0.10|
|NTCG104LH104JTDS||100,000|±5%|4485|4533|4550|4573|±3%|0.10|
|NTCG104LH154JTDS<br>150,000|||±5%|4485|4533|4550|4573|±3%|0.08|



## **150°C RESPONSE COUNTERPARTS（OPERATING TEMPERATURE RANGE：–40 to 150°C）** 

||**Part No.**|**Resistance**|**Resistance**|**B constant**|**B constant**|**B constant**|**B constant**|**B constant**|**Permissible**|
|---|---|---|---|---|---|---|---|---|---|
|||**[25°C]**|**tolerance**|**[25/50°C]**|**[25/75°C]**|**[25/85°C]**|**[25/100°C]**|**tolerance**|**operating**|
|||**(****)**||**(K)**|**(K)**|**(K)**|**(K)**||**current**|
||||||||||**[25°C]**|
||||||||||**(mA)**|
|NTCG103JF103FT1S||10,000|±1%|3380|3422|3435|3453|±1%|0.31|
||NTCG104EF104FT1SX|100,000|±1%|4250|4293|4308|4327|±1%|0.10|



Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(8/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **NTCG series 1608 type** 

## **SHAPE & DIMENSIONS** 

## **RECOMMENDED LAND PATTERN** 

**==> picture [24 x 6] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.6±0.1<br>**----- End of picture text -----**<br>


0.6 to 0.8 0.6 to 0.8 0.6 to 0.8 ~~CL ee~~ 0.2 min. Electrode material Internal:Pd Dimensions in mm ~~im~~ External:Ag/Ni/Sn 

## **125°C RESPONSE COUNTERPARTS（OPERATING TEMPERATURE RANGE：–40 to 125°C）** 

|**Part No.**|**Part No.**|**Resistance**|**Resistance**|**B constant**|**B constant**|**B constant**|**B constant**|**B constant**|**Permissible**|
|---|---|---|---|---|---|---|---|---|---|
|||**[25°C]**|**tolerance**|**[25/50°C]**|**[25/75°C]**|**[25/85°C]**|**[25/100°C]**|**tolerance**|**operating**|
|||**(****)**||**(K)**|**(K)**|**(K)**|**(K)**||**current**|
||||||||||**[25°C]**|
||||||||||**(mA)**|
|NTCG163EH101HTDS||100|±3%|3244|3249|3250|3251|±3%|3.16|
|NTCG164BH222JTDS||2,200|±5%|4096|4100|4100|4100|±3%|0.67|
|NTCG164BH472JTDS||4,700|±5%|4067|4092|4100|4110|±3%|0.46|
|NTCG163JF103FTDS||10,000|±1%|3380|3422|3435|3453|±1%|0.31|
|NTCG163JF103HTDS||10,000|±3%|3380|3422|3435|3453|±1%|0.31|
|NTCG163JH103HTDS||10,000|±3%|3380|3422|3435|3453|±3%|0.31|
|NTCG163JX103DTDS||10,000|±0.5%|3380|3422|3435|3453|±0.7%|0.31|
|NTCG164BH103JTDS||10,000|±5%|4067|4092|4100|4110|±3%|0.31|
|NTCG164LH223JTDS||22,000|±5%|4485|4533|4550|4573|±3%|0.21|
|NTCG164LH473HTDS||47,000|±3%|4485|4533|4550|4573|±3%|0.14|
|NTCG164LH473JTDS||47,000|±5%|4485|4533|4550|4573|±3%|0.14|
|NTCG164KF104FTDS||100,000|±1%|4419|4468|4485|4509|±1%|0.10|
|NTCG164LH104JTDS||100,000|±5%|4485|4533|4550|4573|±3%|0.10|
|NTCG164LH154JTDS||150,000|±5%|4485|4533|4550|4573|±3%|0.08|



## **150°C RESPONSE COUNTERPARTS（OPERATING TEMPERATURE RANGE：–40 to 150°C）** 

||**Part No.**|**Resistance**|**Resistance**|**B constant**|**B constant**|**B constant**|**B constant**|**B constant**|**Permissible**|
|---|---|---|---|---|---|---|---|---|---|
|||**[25°C]**|**tolerance**|**[25/50°C]**|**[25/75°C]**|**[25/85°C]**|**[25/100°C]**|**tolerance**|**operating**|
|||**(****)**||**(K)**|**(K)**|**(K)**|**(K)**||**current**|
||||||||||**[25°C]**|
||||||||||**(mA)**|
|NTCG163JF103FT1S||10,000|±1%|3380|3422|3435|3453|±1%|0.31|
||NTCG163JX103DT1S|10,000|±0.5%|3380|3422|3435|3453|±0.7%|0.31|
|NTCG164KF104FT1S||100,000|±1%|4419|4468|4485|4509|±1%|0.10|



Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(9/17) 

## **NTC Thermistors** 

## **Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **NTCG series RT table** 

## **RT CONVERSION TABLE: 100**  **to 22k**  

||**Part No.**|**NTCG**□□**3E**□**101 to**|**NTCG**□□**4B**□**222 to**|**NTCG**□□**4B**□**472 to**|**NTCG**□□**3J**□**103 to**|**NTCG**□□**4B**□**103 to**|**NTCG**□□**4L**□**223 to**|
|---|---|---|---|---|---|---|---|
||**Resistance**|100|2.2 k|4.7 k|10 k|10 k|22 k|
||B constant(25/85°C)|3250|4100|4100|3435|4100|4550|
|B constant(25/50°C)||3244|4096|4067|3380|4067|4485|
||temperature|Resistance|Resistance|Resistance|Resistance|Resistance|Resistance|
||(°C)|(k)|(k)|(k)|(k)|(k)|(k)|
||–40|1.96|91.91|180.7|188.5|384.4|1120|
||–35|1.48|64.79|128.5|144.3|273.4|780.9|
||–30|1.13|46.23|92.51|111.3|196.8|550.8|
||–25|0.87|33.37|67.35|86.6|143.3|392.7|
||–20|0.68|24.36|49.56|67.8|105.4|282.9|
||–15|0.53|17.97|36.84|53.46|78.37|205.8|
||–10|0.42|13.39|27.65|42.45|58.83|151.1|
||–5|0.33|10.08|20.94|33.93|44.56|112.0|
||0|0.269|7.655|16.01|27.28|34.06|83.71|
||5|0.218|5.868|12.34|22.07|26.25|63.10|
||10|0.177|4.536|9.583|17.96|20.39|47.94|
||15|0.146|3.536|7.503|14.70|15.96|36.71|
||20|0.120|2.779|5.917|12.09|12.59|28.32|
||25|0.100|2.200|4.700|10.00|10.00|22.00|
||30|0.084|1.755|3.758|8.31|7.997|17.21|
||35|0.070|1.410|3.025|6.94|6.437|13.55|
||40|0.059|1.140|2.450|5.826|5.213|10.74|
||45|0.050|0.928|1.996|4.911|4.248|8.565|
||50|0.043|0.760|1.636|4.158|3.481|6.871|
||55|0.037|0.626|1.348|3.536|2.869|5.543|
||60|0.032|0.519|1.117|3.019|2.377|4.497|
||65|0.028|0.433|0.930|2.588|1.979|3.668|
||70|0.024|0.363|0.779|2.227|1.657|3.007|
||75|0.021|0.305|0.655|1.924|1.393|2.478|
||80|0.018|0.258|0.553|1.668|1.177|2.052|
||85|0.016|0.220|0.469|1.451|0.999|1.707|
||90|0.014|0.188|0.400|1.267|0.851|1.426|
||95|0.013|0.161|0.342|1.110|0.729|1.197|
||100|0.011|0.139|0.294|0.975|0.626|1.009|
||105|0.010|0.120|0.254|0.860|0.540|0.853|
||110|0.009|0.104|0.220|0.760|0.468|0.725|
||115|0.008|0.091|0.191|0.674|0.406|0.618|
||120|0.007|0.079|0.166|0.599|0.354|0.529|
||125|0.006|0.069|0.146|0.534|0.310|0.454|
||130|—|—|—|0.478|—|—|
||135|—|—|—|0.428|—|—|
||140|—|—|—|0.385|—|—|
||145|—|—|—|0.346|—|—|
||150|—|—|—|0.313|—|—|



＊ The ends "1S ○ ," refer to 150°C divisions 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(10/17) 

## **NTC Thermistors** 

## **Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **NTCG series RT table** 

## **RT CONVERSION TABLE: 47k**  **to 150k**  

||**Part No.**|**NTCG**□□**4L**□**473 to**|**NTCG**□□**4B**□**683 to**|**NTCG**□□**4K**□**104 to**|**NTCG**□□**4E**□**104 to**|**NTCG**□□**4L**□**104 to**|**NTCG**□□**4L**□**154 to**|
|---|---|---|---|---|---|---|---|
||Resistance|47 k|68 k|100 k|100 k|100 k|150 k|
||B constant(25/85°C)|4550|4150|4485|4308|4550|4550|
|B constant(25/50°C)||4485|4085|4419|4250|4485|4485|
||temperature|Resistance|Resistance|Resistance|Resistance|Resistance|Resistance|
||(°C)|(k)|(k)|(k)|(k)|(k)|(k)|
||–40|2392|2409|4864|4251|5089|7634|
||–35|1668|1719|3400|3005|3549|5324|
||–30|1177|1246|2405|2149|2503|3755|
||–25|838.9|916.0|1720|1554|1785|2677|
||–20|604.3|681.0|1243|1135|1286|1929|
||–15|439.6|511.4|907.6|837.8|935.3|1403|
||–10|322.8|387.4|669.0|624.1|686.9|1030|
||–5|239.2|295.9|497.6|469.1|509.0|763.5|
||0|178.8|227.7|373.4|355.6|380.5|570.7|
||5|134.8|176.5|282.5|271.8|286.8|430.2|
||10|102.4|137.7|215.5|209.4|217.9|326.9|
||15|78.42|108.2|165.6|162.5|166.9|250.3|
||20|60.50|85.51|128.2|127.0|128.7|193.1|
||25|47.00|68.00|100.0|100.0|100.0|150.0|
||30|36.77|54.40|78.51|79.23|78.23|117.3|
||35|28.95|43.77|62.05|63.18|61.60|92.40|
||40|22.95|35.41|49.34|50.68|48.82|73.23|
||45|18.30|28.81|39.48|40.90|38.93|58.40|
||50|14.68|23.56|31.77|33.19|31.23|46.84|
||55|11.84|19.37|25.71|27.09|25.20|37.79|
||60|9.607|16.00|20.92|22.22|20.44|30.66|
||65|7.836|13.28|17.12|18.32|16.67|25.01|
||70|6.425|11.08|14.07|15.18|13.67|20.50|
||75|5.294|9.284|11.62|12.64|11.26|16.89|
||80|4.383|7.814|9.649|10.58|9.325|13.99|
||85|3.646|6.604|8.046|8.887|7.757|11.64|
||90|3.046|5.604|6.738|7.500|6.482|9.722|
||95|2.557|4.775|5.667|6.357|5.440|8.159|
||100|2.155|4.083|4.786|5.410|4.584|6.876|
||105|1.823|3.505|4.057|4.623|3.879|5.819|
||110|1.549|3.019|3.453|3.966|3.295|4.943|
||115|1.321|2.609|2.950|3.415|2.810|4.215|
||120|1.130|2.262|2.529|2.952|2.405|3.607|
||125|0.971|1.967|2.176|2.561|2.066|3.098|
||130|—|—|1.878|2.229|—|—|
||135|—|—|1.626|1.947|—|—|
||140|—|—|1.412|1.707|—|—|
||145|—|—|1.230|1.501|—|—|
||150|—|—|1.075|1.324|—|—|



＊ The ends "1S ○ ," refer to 150°C divisions 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(11/17) 

## **NTC Thermistors Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Attention in the board design** 

## **BOARD DESIGN** 

When attached to NTC substrate thermistor, amount of silver used (fillet size) has direct impact on NTC thermistor after mounting. Thus, sufficient consideration is necessary. 

## **Set of land dimensions** 

(1) As the stress rises in the NTC thermistor owing to the increase in silver, breakage and cracks will occur. Cause including crack, as caution on board land design, configure the shape and dimensions so that the amount of silver is appropriate. 

If you installed 2 or more parts in the Common Land, separated by a solder resist and special land of each component. Dimensions shape 

||A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~|A<br>B<br>C<br>~~i)~~||
|---|---|---|---|---|---|---|---|---|---|---|
||**Shape symbol**|**Shape symbol**||||**Symbol**<br>**A**|**B**|||**C**|
|1005||||||0.30 to 0.50|0.35 to 0.45|||0.4 to 0.6|
|1608||||||0.6 to 0.8|0.6 to 0.8|||0.6 to 0.8|



(2) When peak levels panning-at soldering is excessive, by solder contraction stress, mechanical-thermal stress causes a Yasuku chip crack. 

In addition, when the peak level is underestimated, terminal electrode fixed strength is insufficient. This causes  chip dropouts and may affect circuit reliability. 

Representative example of the panning of peak levels is shown in the following. 

## **Recommended silver dose** 

**==> picture [247 x 395] intentionally omitted <==**

**----- Start of picture text -----**<br>
Solder stress is increased,<br>Solder volume<br>and it is easy for a crack to<br>overload<br>form.<br>At<br>Most large serving amount<br>Decent solder  Minimum prime amount<br>volume<br>Fixed strength is weak, and<br>Solder volume<br>there is connection a<br>deficit<br>wo problem and risk of loss.<br>ALIX<br>Case and suggested protocol want to avoid<br>Improvement example<br>Example Cases to avoid<br>(land division)<br>Leads Leads<br>Chip Solder Solder resist<br>Lead wire and land<br>of part discrete<br>doubles up<br>atl, PCB il<br>Chassis<br>Solder Solder resist<br>(ground solder)<br>Arrangements in<br>the vicinity<br>L1 L2<br>L2>L1<br>Land<br>= S<br>Arrangements of<br>chip component's<br>companion Excess solder Solder resist<br>Land<br>SE Missing solder Sesey<br>**----- End of picture text -----**<br>


## **Case and suggested protocol want to avoid** 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(12/17) 

## **NTC Thermistors** 

## **Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Attention in the board design** 

## **Arrangements of components** 

(1)  I was based on camber of substrate and  suggested protocol of NTC thermistor arrangement, as stress does not join to the utmost is shown in following. 

**==> picture [250 x 286] intentionally omitted <==**

**----- Start of picture text -----**<br>
Substrate for flexural stress Substrate for flexural stress<br>Adverse events Good example<br>Perforation or slit Perforation or slit<br>Y| Y|<br>Direction of<br>surface solder<br>\ 7 \ a<br>Solder the mountain fold as a Solder the mountain fold as a<br>top.   bottom.<br>Perforation or slit Perforation or slit<br>Chip<br>arrangements<br>(direction) C J ] Do<br>Mounted vertically to the  Mounted horizontally to the<br>perforation and slit. perforation and slit.<br>L1 L2<br>Distance from<br>perforation and<br>slit portion (L1<L2) (L1<L2)<br>Close location is  It is an advantage so distant<br>disadvantageous of  location away places the<br>perforation and slit.  perforation and slit.<br>**----- End of picture text -----**<br>


(2) In payment near by board, depending on mount position of NTC PTC, as mechanical stress varies, please refer to the following diagram. 

**==> picture [151 x 77] intentionally omitted <==**

**----- Start of picture text -----**<br>
E D<br>im |<br>Perforation C<br>O000\. Cc)i:<br>B<br>A<br>A i<br>Slit<br>**----- End of picture text -----**<br>


The order of A > B = C > D > E eases the stress. 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(13/17) 

**NTC Thermistors Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Attention on the mounting** 

## **APPLICATION TO BOARD** 

## **Mounting head pressure** 

Under suction nozzle if dead point too, during implementation, excessive force joins of NTC thermistor low, as cause causes of crack, please use with reference to something about following. 

- 1) Being set to top surface of substrate so that under suction nozzle as for dead center, substrate does not bend back, and adjust, please. 

- 2) Nozzle pressure at implementation is 0.1 to 0.3 N in static load, please. 

- 3) Substrate fixes up back surface of substrate with support pin in impact of suction nozzle to wely deflection to the utmost, and substrate hold deflection, please. 

## Reflow temperature profile 

**==> picture [197 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
Preheating Soldering Natural<br>cooling<br>Peak<br>T4<br>T3 T3<br>T2 t3<br>T1<br>t1 t2<br>t: Time<br> Temperature<br>T:<br>**----- End of picture text -----**<br>


A representative example is shown in the following. 

**==> picture [229 x 136] intentionally omitted <==**

**----- Start of picture text -----**<br>
Cases to avoid Recommended case<br>Crack<br>Single-sided  ——<br>mounting<br>a<br>Support pin<br>Double-sided<br>— oy gt<br>mounting<br>Tea Solder peeling Crack Support pin Se<br>**----- End of picture text -----**<br>


Mechanical shock that, if positioning your nail to wear, ragged edge of positionings, participates in NTC thermistor are locally, and NTC thermistor, as there is possibility of crack generated, cut the closed positioning, and maintenance and inspection, and, exchange of manage dimensions and position nail periodically, please. 

## **SOLDERING** 

Significant impact is possible on the performance of NTC thermistor, flux checks something about follow, please use. 

(1) Flux uses one with 0.1wt % (Cl conversion) or less halide substance contains amounts, please. In addition, do not do this with strongly acidic objects. 

- (2) Flux during is soldered (2) NTC substrate thermistor is applied the smalleset amount necessary, please. 

|**Item**|**Specification**<br>**for eutectic**|**For lead-free**|
|---|---|---|
|Preheatingtemperature<br>Solder meltingtemperature|**mixture solder**<br>160 to 180°C<br>200°C|**solder**<br>150 to 180°C<br>230°C|
|Maximum temperature<br>Preheatingtime|240°C max．<br>100s max.|260°C max.<br>120s max.|
|Time to reach higher than the<br>solder meltingtemperature<br>number ofpossible reflow cycles|30s max.<br>2 max.|40s max.<br>2 max.|



## **SOLDERING IRON** 

(1) The tip temperature and also by (1) types of soldering irons, the size of the substrate, and the geometry of the land pattern.Being earlier, but when as there is possibility that crack occurs in the heat anderson impaction, point soldering iron temperature is high, please do solder work within the following conditions. 

|**Temperature**<br>**of iron tips**<br>（**°C**）<br>**Wattage**<br>（**W**）|**Temperature**<br>**of iron tips**<br>（**°C**）<br>**Wattage**<br>（**W**）|**Temperature**<br>**of iron tips**<br>（**°C**）<br>**Wattage**<br>（**W**）|**Pallet point**<br>**shape**<br>（**mm**）|**Soldering time**<br>**(Second)**|**Frequency**|
|---|---|---|---|---|---|
||||||Within each|
|**350max.**||20max.|ø3.0max.|5 max.|terminal once<br>(Within total of|
||||||twice)|



(2) Direct iron tip is in contact with the (2) NTC thermistor body, and the strain owing to thermal shock in particular grows even if a crack is generated. Therefore, please do not touch it directly to the terminal electrodes. 

- (3) If Used soluble flux, perform thorough wash particularly, please. 

Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(14/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Attention after mounting** 

## **CLEANING** 

(1)  If cleaning liquid is inappropriate, residues and other foreign body of fluxes builds up on NTC PTC surface, and can degrade the performance of NTC thermistor (particularly the insulation resistance). 

- (2)  Wash conditions may compromise performance of NTC thermistor if they are improper (wash due, wash excess). 

## **2-1) For wash due** 

- (a)By substance of a system in flux residue halide, metal including terminal electrodes may experience corrosion. 

- (b)Substance of a system in flux residue halide builds up on NTC PTC surface, and reduces the insulation resistance. 

- (c) Soluble flux makes comparisons of colophony series flux, and there is event with trends of significant (1) and(2). 

## **2-2) For excess wash** 

(2) During each substrate operational check, push pressure with contact failure of check pin of boards checkers of check pin may be toned up to be prevented. As substrate is bent under loading, NTC thermistor is broken owing to stress. There is also the possibility that solder on the terminal electrode will peel off. Follow the diagram for reference, and check that the substrate bends, please. 

**Item Cases to avoid Recommended case** Y Peeling Support pin ‘\ Substrate sags __AC ~~I~~ K ~~__ AC~~ Check pin Check pin ~~ee~~ 

## **SINGLE-PART COMPONENT HANDLING** 

(1) To drop impact, as there is possibility that breakage and crack is entered, do not NTC thermistor that(1) NTC thermistor falls. 

- (1) Owing to lavage, NTC PTC surface deteriorates, and reduces performance of NTC thermistor. 

- (2) In ultrasonography, when output is passed, substrate resonates size, and crack occurs in body and sprang of NTC thermistor in vibration of substrate. Since this may reduce the strength of the terminal electrode, please note the following conditions. 

   - Output  Ultrasound output Frequency  Ultrasonic frequency Cleaning time  Ultrasound cleaning time 

2-3) Concentration including halogen that when cleaning liquid to pollution, when you released is higher, and may cause similar of results into wash due. 

**==> picture [41 x 41] intentionally omitted <==**

**----- Start of picture text -----**<br>
Crack<br>Floor<br>**----- End of picture text -----**<br>


(2) At stacking storage after implementation and treatment of substrate, corner of boards is regarded as NTC thermistor. Please be careful, as there is the possibility that breakage and cracks will occur on impact. 

**==> picture [131 x 13] intentionally omitted <==**

**----- Start of picture text -----**<br>
Crack<br>Board<br>**----- End of picture text -----**<br>


## **SUBSTRATE HANDLING AFTER COMPONENT** 

## **MOUNTING** 

(1) When substrate is divided, a flexible so that show in following diagram to substrate, and is given by stress including twist, as there is possibility that crack occurs of NTC thermistor, please check that stress is within acceptable limits. 

**==> picture [192 x 42] intentionally omitted <==**

**----- Start of picture text -----**<br>
Bends Twist<br>a<br>**----- End of picture text -----**<br>


Please be sure to request delivery specifications that provide further details on the features and specifications of the products for proper and safe use. Please note that the contents may change without any prior notice due to reasons such as upgrading. 

20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(15/17) 

## **NTC Thermistors Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Packaging style** 

## **REEL DIMENSIONS** 

**==> picture [183 x 182] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.0±0.5<br>=<br>0.8<br>ø13±0.2 9.0max.<br>ø21±0.8 14.0max.<br>4 ia<br>ø180±2.0<br>Dimensions in mm<br>ø60min.<br>**----- End of picture text -----**<br>


## **PACKAGE QUANTITY, PRODUCT WEIGHT** 

|**Type**<br>**Package quantity**<br>**Individual weight**<br>**(pieces/reel)**<br>**(mg)**<br>**NTCG10**<br>10,000<br>2.5<br>**NTCG16**<br>4,000<br>5.0<br>~~Oo~~|
|---|



## **TAPE DIMENSIONS** 

**==> picture [341 x 236] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.5 [+0.1] 0 2.0±0.05 4.0±0.1<br>pp eae a i<br>A HLL P1 tL. T<br>Dimensions in mm<br>Type A B P1 T<br>NTCG10 0.65+0.05/–0.1 1.15+0.05/–0.1  2±0.05 0.65max.<br>NTCG16 1.1±0.2 1.9±0.2 4±0.1 1.1max.<br>oe ee<br>160min. Taping 200min.<br>Sen Drawing direction aar ir 300min. e Dimensions in mm<br>1.75±0.1<br>B 3.5±0.05 8.0±0.3<br>**----- End of picture text -----**<br>


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20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(16/17) 

## **NTC Thermistors** 

**Automotive grade:Corresponding to 125,150°C** 

**Product compatible with RoHS directive Compatible with lead-free solders AEC-Q200** 

## **Description and definition of terms** 

## **INITIAL RESISTANCE** 

Thermistor resistance is a function of absolute temperature as indicated by the following relationship: 

1 1 R=R0 • expB – ............................................................ (1) ( T T0 ) Here R0, R(k  ) are the respective resistance values when the surrounding temperature is T0, T(K). B is the thermistor constant(B constant below). 

## **B CONSTANT** 

The B constant is found from the following equation: 

2.3026(logR–logR0) B= T1 – T10 ....................................................... (2) 

This B characteristic is indicated by the slope of the linear plot of log R-1/T inverse absolute temperature. 

The B constant value is generally in the vicinity of 2500K to 5000K. B constant values of 3000K to 4000K are frequently used for measurements. 

## **Resistance-temperature characteristics (Fig.1)** 

**==> picture [167 x 162] intentionally omitted <==**

**----- Start of picture text -----**<br>
 Temperature [(] ˚C [)]<br>450 400 350 300 250 200 150 100<br>100<br>fe<br>pity ee ee Pye ty te<br>20kΩ/200˚C<br>10 Ce<br>fF<br>PTT TAT TT eT eT et<br>3.3kΩ/100˚C<br>1 Ha, AUSnRIne-A0naI ree<br>Po fn<br>Pt tt tt eee et<br>PETE 1.4 1.6  EAE 1.8 2 2.2 EE EEE 2.4 2.6  EEE 2.8 3<br>1 ×10 [3][(] K [)]<br>T<br>)Ω<br>Resistance(k<br>**----- End of picture text -----**<br>


## **TEMPERATURE COEFFICIENT** 

The relationship between temperature coefficient  and B becomes: 1 dR B  = R • dT = – T[2]  100(%/°C) ............................................. (3) The negative sign of the temperature coefficient indicates that the temperature coefficient decreases as both thermistor resistance and temperature rise. If B is taken as 3400K, the temperature coefficient found at 20°C (293.15K) becomes –4%/°C. 

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20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm 

(17/17) 

## **HEAT DISSIPATION COEFFICIENT** 

Temperature rises due to thermal energy formed as electrical current flows through the thermistor. The thermistor temperature T0 is then related to the surrounding temperature Ta and the electrical input W: 

W=k(T0–Ta)=V•I(mW)  ............................................................ (4) 

**==> picture [234 x 18] intentionally omitted <==**

This k value is the heat dissipation coefficient, which represents the additional electrical power (mW/°C) needed to raise the thermistor temperature by 1°C. This heat dissipation coefficient varies with changes in the measurement and environmental conditions. When a thermistor is used for temperature measurement, it is naturally important to lower the applied electrical current as much as possible in order to reduce measurement error resulting from self heating. 

## **VOLTAGE - CURRENT CHARACTERISTIC** 

The voltage - current characteristic indicates the drop in voltage as electrical current through the thermistor is gradually increased. 

## **Voltage-current characteristics (Fig.2)** 

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**----- Start of picture text -----**<br>
100<br>Le eeeT<br>5<br>10 4 3<br>2<br>1<br>4 AT<br>1 7070<br>Ta=25˚C [(] in still air [)]<br>No.1 5kΩ<br>2 10kΩ<br>eeee 34 20k50kΩΩ<br>li 5 100kΩ<br>0.1 1 10 100<br>Current [(] mA [)]<br>HEATING TIME CONSTANT<br>The time period required to heat up a thermistor from a certain temperature T0 over a target temperature rise is called the heating time 0 over a target temperature rise is called the heating time  over a target temperature rise is called the heating time<br>constant. Various types of heating time constants are indicated by the symbols shown in Table 1 as determined by the percent change<br>from T0 toward the target temperature. The standard change is typically taken to be 63.2%.0 toward the target temperature. The standard change is typically taken to be 63.2%. toward the target temperature. The standard change is typically taken to be 63.2%.<br>Thermal time constants (Fig.3)<br>70<br>60 T0<br>Heating Table 1 Heating time constant and temperature change ratio<br>50 MK pretLL tyLo t OO Code Rate of change (%) for T0 -Ta<br>Th  63.2<br>40 2  86.5<br>rete Tc | ot tT 3  95.0<br>30 4  98.2<br>ete | tT | re 5  99.4<br>20 foe 6  99.8<br>Room temperature  Ta Cooling<br>7  99.9<br>10 Pf Le<br>0 Pi τ [ttt] 2τ 3τ 4τ t 5τ yt 6τ a 7 | τ y OO<br>Voltage(V)<br>–Ta)0 0.632<br>(T ×<br>Temperature(˚C) –Ta)0 0.368<br>(T ×<br>**----- End of picture text -----**<br>


The time period required to heat up a thermistor from a certain temperature T0 over a target temperature rise is called the heating time 0 over a target temperature rise is called the heating time  over a target temperature rise is called the heating time constant. Various types of heating time constants are indicated by the symbols shown in Table 1 as determined by the percent change from T0 toward the target temperature. The standard change is typically taken to be 63.2%.0 toward the target temperature. The standard change is typically taken to be 63.2%. toward the target temperature. The standard change is typically taken to be 63.2%. 

## **Thermal time constants (Fig.3)** 

## **PERMISSIBLE OPERATING CURRENT** 

This is the maximum load current limit below 1°C temperature rise due to thermistor self-heating. It's possible to express it in the following system. 

Maximum allowed current [mA] ＝ √（Heat dissipation constant[mW/°C] ÷ Resistance[  ] 

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20170307 / tpd_automotive_ntc-thermistor_ntcg_en.fm