# SMD FUSE, FAST ACTING, 5A, 45VAC

![Product image](https://novapart.co/image/farnell:4047419/)

**URL**: https://novapart.co/products/0437005.WRA/smd-fuse-fast-acting-5a-45vac
**SKU**: 0437005.WRA
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || Fuses & Fuse Accessories || Fuses || SMD Fuses
**Price**: €1.0800
**Stock**: 1000+
**Lead Time**: 137 days (indicative)

## Description

Fuse Current:5A; Blow Characteristic:Fast Acting; Voltage Rating VAC:45V; Voltage Rating VDC:63V; Fuse Case Style:1206 ^3216 Metric]; Product Range:437A Series; Break 34AK1034

## Specifications

| Parameter | Value |
|---|---|
| Fuse Current | 5A |
| Product Range | 437A Series |
| Fuse Case Style | 1206 (3216 Metric) |
| Voltage Rating Vac | 45V |
| Voltage Rating Vdc | 63V |
| Blow Characteristic | Fast Acting |
| Breaking Capacity Current Ac | 50A |
| Breaking Capacity Current Dc | 50A |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4047419/)

Fuse **Datasheet** 

**437A Series** 1206 Fast-Acting Ceramic Fuse 

## OH **RoHS Pb** 

## **Description** 

The 437A Series AECQ-Compliant fuses are specifically tested to cater to secondary circuit protection needs of compact autoelectronics applications. 

The general design ensures excellent temperature stability and performance reliability. In addition to this, the high I²t values typical of the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. 

## **Features** 

- Operating Temperature from ■ Fast response to faulty -55ºC to +150ºC current to ensure over-current 

- ■ 100% Lead-free, Halogen-Free protection for sensitive and RoHS compliant electronic components 

## **Additional Information** 

- Meets Littelfuse’s automotive qualifications* 

- - Largely based on Littelfuse internal AEC-Q200 test plan. 

## **Applications** 

- Li-ion Battery ■ TFT  Display 

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Resources Accessories Samples<br>**----- End of picture text -----**<br>


- LED Lighting ■ Battery Management System 

- ■ Automotive Navigation (BMS) System ■ Clusters 

## **Electrical Characteristics for Series** 

|**% of Ampere Rating**<br>100%|**Ampere Rating**<br>0.250A − 8A|**Opening Time at 25ºC**<br>4 hours, Minimum|
|---|---|---|
|250%|0.750A − 8A|5 seconds, Maximum|
|350%|0.750A − 8A|1 second, Maximum|
||0.250A - 0.500A|5 seconds, Maximum|



## **Agency Approvals** 

|**Agency**<br>cWdus|**Agency File Number**<br>E10480|**Ampere Range**<br>0.250A − 8A|
|---|---|---|
|@.|29862|0.250A − 8A|



## **Electrical Specifications by Item** 

|**Ampere**<br>**Rating**<br>**(A)**<br>0.250|**Amp Code**<br>.250|**Max.**<br>**Voltage**<br>**Rating (V)**<br>125|**Interrupting Rating1**<br>50A @ 125VAC/DC|**Nominal**<br>**Resistance**<br>**(Ohms)2**<br>2.290|**Nominal**<br>**Melting I2t **<br>**(A2Sec.)3**<br>0.003|**Nominal Voltage**<br>**Drop At Rated**<br>**Current (V)4**<br>0.78|**Nominal Power**<br>**Dissipation At Rated**<br>**Current (W)**<br>0.195|**Agency**<br>**Approvals**|**Agency**<br>**Approvals**|
|---|---|---|---|---|---|---|---|---|---|
|||||||||x<br>Ws|x|
|0.375|.375|125||1.330|0.010|0.60|0.225|x|x|
|0.500|.500|63|50A @ 63VAC/DC|0.908|0.018|0.52|0.260|x|x|
|0.750|.750|63|50A @ 63VAC/DC<br>100A @ 63VDC|0.600|0.064|0.45|0.338|x|x|
|1.00|001.|63|50A @ 63VAC/DC|0.420|0.100|0.41|0.410|x|x|
|1.25|1.25|63||0.318|0.256|0.40|0.500|x|x|
|1.50|01.5|63||0.209|0.324|0.39|0.585|x|x|
|1.75|1.75|63||0.071|0.075|0.27|0.473|x|x|
|2.00|002.|63||0.062|0.144|0.20|0.400|x|x|
|2.50|02.5|63|50A @ 45VAC/63VDC|0.043|0.441|0.15|0.375|x|x|
|3.00|003.|63||0.035|0.506|0.14|0.420|x|x|
|3.50|03.5|63||0.027|0.777|0.13|0.455|x|x|
|4.00|004.|63||0.022|1.024|0.13|0.520|x|x|
|5.00|005.|63||0.0159|2.30|0.13|0.650|x|x|
|7.00|007.|35|50A @ 32VAC/35VDC|0.0100|5.02|0.13|0.910|x|x|
|8.00|008.|35||0.008|7.23|0.13|1.040|x|x|



**Notes:** 

1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 

2. Nominal Resistance measured with < 10% rated current. 

Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See “Temperature Re-rating Curve”for additional re-rating information. Devices designed to be mounted with marking code facing up. 

3. Nominal Melting I²t measured at 1 msec. opening time. 

4. Nominal Voltage Drop measured at rated current after temperature has stabilized. 

© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/08/21 

**6** 

Fuse **Datasheet** 

## **437A Series** 1206 Fast-Acting Ceramic Fuse a 

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**----- Start of picture text -----**<br>
Temperature Re-rating Curve<br>140<br>120<br>100<br>80<br>60<br>40<br>-65     -45      -25       -5        15       35       55       75       95      115     135    155<br>TEMPERATURE (°C)<br>PERCENT OF RATING<br>**----- End of picture text -----**<br>


## **Note:** 

1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. 

## **Example:** 

- For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: 

- I = (0.80)(0.85)IRAT = (0.68)IRAT 

## **Part Numbering System** 

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**----- Start of picture text -----**<br>
0437  005.  W   R   A<br>SERIES AEC-Q200 QUALIFIED<br>AMP CODE PACKING CODE<br>R = Tape and Reel<br>QUANTITY CODE<br>W = 3000 pcs<br>**----- End of picture text -----**<br>


## **Average Time Current Curves** 

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**----- Start of picture text -----**<br>
4A 5A [7A 8A]<br>100<br>10<br>1<br>0,1<br>0,01<br>0,001<br>0,1 1 10 100<br>CURRENT IN AMPERES<br>.250A .375A .500A .750A 1A 1.25A 1.5A 1.75A2A 2.5A 3A3.5A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br>


## **Soldering Parameters** 

**Reflow Condition** Pb-free assembly **t** P **- Temperature Min (Ts(min))** 150°C **T** P **Critical Zone Pre Heat - Temperature Max (Ts(max))** 200°C **Ramp-up TL to TP Average Ramp-up Rate - Time (Min to Max) (ts)** 60 – 180 seconds **T** S(max) **T** L **t** L 5°C/second max. **(Liquidus Temp (TL) to peak) Ramp-down TS(max) to TL - Ramp-up Rate** 5°C/second max. **T** S(min) **Preheat Reflow - Temperature (TL) (Liquidus)** 217°C **t** S **- Temperature (tL)** 60 – 150 seconds **25 Peak Temperature (TP)** 260[+0/-5] °C **time to peak temperature Time (t 25ºC to peak) Time within 5°C of actual peak Temperature (tp)** 20 – 40 seconds **Ramp-down Rate** 5°C/second max. **Time 25°C to peak Temperature (TP)** 8 minutes max. **Do not exceed** 260°C **Wave Soldering** 260°C, 10 seconds max. 

© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/08/21 

**7** 

Fuse **Datasheet** 

**437A Series** 1206 Fast-Acting Ceramic Fuse 

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**==> picture [311 x 52] intentionally omitted <==**

## **Product Characteristics** 

|**Materials**|**Materials**|**Materials**|**Materials**|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**Moisture Sensitivity**<br>**Level**||||<br>IPC/JEDEC J-STD-020, Level 1||||||||||
|**Solderability**||||IPC/EIC/JEDEC J-STD-002, Condition B||||||||||
|**Humidity Test**||||MIL-STD-202, Method 103, Conditions D||||||||||
|**Resistance to Solder**<br>**Heat**||||<br>MIL-STD-202, Method 210, Condition B||||||||||
|**Moisture**<br>**Resistance**||||MIL-STD-202, Method 106||||||||||
|**Thermal Shock**||||MIL-STD-202, Method 107,<br>Condition B||||||||||
|**Mechanical Shock**||||MIL-STD-202, Method 213,<br>Condition A||||||||||
|**Vibration**||||MIL-STD-202, Method 201||||||||||
|**Vibration,**<br>**High Frequency**||||MIL-STD-202, Method 204,<br>Condition D||||||||||
|**Dissolution of**<br>**Metallization**||||IPC/EIC/JEDEC<br>Condition D||J-STD-002,||||||||
|||||||||||||||
|**Terminal Strength**||||IEC 60127-4||||||||||
|**Dimensions**<br>3.200 ± 0.1778<br>[0.126 ± 0.007]<br>1.000<br>[0.039]<br>1.63 +0.10 / -0.2<br>[0.064 +0.004 / -0.008]<br>N<br>0.835 ± 0.15<br>[0.0329 ± 0.006]<br>2||||||**ions**||||||||
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## **Dimensions** 

|**acteristics**||
|---|---|
|**High Temperature**<br>**Storage**|MIL-STD-202 Method 108 with exemptions|
|**Thermal Shock Test**|JESD22 Method JA-104,<br>Test Conditions B and N|
|**Biased Humidity**|MIL-STD-202 Method 103, 85°C/85% RH with<br>10% operating power for 1000 hrs|
|**Operational Life**|MIL-STD-202 Method 108, Test Condition D|
|**Resistance To**<br>**Solvents**|MIL-STD-202 Method 215|
|**Mechanical Shock**|MIL-STD-202 Method 213, Test Condition C|
|**High Frequency**<br>**Vibration**|MIL-STD-202, Method 204|
|**Resistance To**<br>**Soldering Heat**|MIL-STD-202 Method 210, Test Condition B|
|**Solderability**|JESD22-B102E Method 1|
|**Terminal Strength**<br>**For SMD**|AEC Q200-006|
|**Board Flex**|AEC Q200-005|
|**Electrical**<br>**Characterization**|3 Temperature Electrical Characterization|



## **Part Marking System** 

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**----- Start of picture text -----**<br>
3.200 ± 0.1778<br>1.000 [0.126 ± 0.007] Amp Code Marking Code<br>[0.039]<br>.250 D<br>.375 E<br>1.63 +0.10 / -0.2 .500 F<br>[0.064 +0.004 / -0.008]<br>N .750 G<br>001. H<br>1.25 J<br> [0.0329 ± 0.006] 0.835 ± 0.15   01.5 K<br>1.75 L<br>2 002. N<br>[0.039]1.000 [0.059]1.500 02.5 O<br>003. P<br>1.800 3.500 R<br>[0.071]<br>004. S<br>005. T<br>[0.020 ± 0.008]0.520 ± 0.200 [0.138]3.500 007. W<br>008. |X|<br>**----- End of picture text -----**<br>


## **Packaging** 

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**----- Start of picture text -----**<br>
Packaging Option Packaging Spec i fication Quantity Quantity and Packaging Code<br>8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WRA<br>**----- End of picture text -----**<br>


**Disclaimer Notice** - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications.  Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. 

© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/08/21 

**8** 



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- [View this product on Novapart](https://novapart.co/products/0437005.WRA/smd-fuse-fast-acting-5a-45vac)
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- [Supplier page](https://es.farnell.com/littelfuse/0437005-wra/smd-fuse-fast-acting-5a-45vac/dp/4047419)
---

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