C1T 2.5

Type C1T Surface Mount Slow Blow Chip Fuse 

## C1T Series – 1206 Size 

RoHS 2 Compliant 

## **Features** 

- Slow Blow 

- Small size, 1206 SMD 

- Current rating from 750mA to 8A 

- Wide operating temperature range from -55℃ to 125℃ 

- Tape and Reel for automatic SMD placement 

- Compatible with 260℃ IR Pb-free and wave soldering process 

- AEC-Q Compliant 

- RoHS 2 compliant (MSL = 1) 

- Halogen Free and Lead Free 

- Meets Bel automotive qualification* 

* - Largely based on internal AEC-Q test plan 

## **Applications** 

- Notebook 

- Automotive Navigation System 

- LED Headlights 

- Thin film transistor LCD flat-panel display screen 

- PC computer 

- Office electronic equipment 

- Industrial equipment 

## **AEC-Q Compliant** 

- Medical equipment 

- POE, POE+ 

- LCD / LED monitor and LCD / LED TV 

- Power supply LEAD FREE = - DC-DC Converter HALOGEN FREE = 

**Typical Part Marking** Fuse body (ceramic white side) marked with marking code. 

Example: 

|Current<br>Rating|Marking<br>Code|Current<br>Rating|Marking<br>Code|
|---|---|---|---|
|750mA|TM|3.5A|TZ|
|1A|T1|4A|T4|
|1.25A|TP|5A|T5|
|1.5A|TR|6A|T6|
|2A|T2|7A|T7|
|2.5A|TT|8A|T8|
|3A|T3|||



## **Electrical Characteristics (UL STD. 248-14)** 

|Testing Current|Testing Current|||Minimum|Blow|Time<br>Maximum|Time<br>Maximum|
|---|---|---|---|---|---|---|---|
||100%|||4 Hrs.|||N/A|
||200%|||1 Sec|||120 Sec|
||300%|||0.1 Sec|||3 Sec|
||800%|||0.002 Sec|||0.05 Sec|
|**Safety**|**y Agency Approvals**|||||||
|Safety|Safety Agency<br>Voltage Rating||||||Ampere Range / Volt|
|Agency|Certificate|||(V)|||@ I.R. ability*|
||E20624<br>750mA-8A/63V<br>AC/DC<br>R 50410861<br>Tested according to<br>750mA-8A/63V|||||750mA-8A/63V AC/DC @50A<br>750mA-8A/63V AC/DC @50A||
||IEC 60127-1: 2006+A1+A2<br>AC/DC|||||or 10In, which is higher||
||IEC 60127-7: 2016|||||||
|**Physical Specifications**<br>*I.R.= InterruptingRating=Short Circuit Rating(Amps)||||||||
||Body : Ceramic|||Substrate||||
|Materials<br>Terminations :|||Ag / Ni / Sn (100% Lead-free)|||||
||Element Cover Coating : Lead-free Glass|||||||
||On Fuse :|||||||
||Marking Code|||||||
|Marking<br>On Label :||||||||
||"bel", "C1T",|"Current Rating", "Voltage Rating",|||||"Interrupting Rating",|
||"Appropriate Safet|riate SafetyLogos" and "<br>",|||"|"(China RoHS compliant).||



## **Safety Agency Approvals** 

## **Physical Specifications** 

Specifications subject to change without notice 

**belfuse.com/circuit-protection** 

**2** / **4** 

## Type C1T 

## **Temperature Derating Curve** 

## **Average Time Current Curve** 

## **Electrical Specifications** 

|Part Number<br>~~ee~~<br>~~ee~~|Ampere<br>Rating<br>(A)<br>~~ee~~<br>|Marking<br>Code<br>~~ee~~|Nominal<br>Cold<br>Resistance<br>(ohms)|Maximum<br>Volt-drop<br>@100% In<br>(Volt) max.|Voltage and<br>Interrupting<br>Ratings|Nominal<br>Melting I²T<br>@10 In<br>(A² Sec)<br>~~ee~~|Maximum<br>Power<br>Dissipation<br>@100% In<br>(W)<br>~~ee~~<br>~~es~~|Agency<br>Approvals|Agency<br>Approvals|
|---|---|---|---|---|---|---|---|---|---|
|||||||||~~ee~~|~~ee~~|
|0685T0750-XX<br>~~ee~~<br>~~ee~~<br>~~ee~~|750mA<br>~~ee~~<br>~~ee~~|TM<br>~~ee~~|0.780|0.795|See Table of<br>Safety<br>Approvals on<br>Page 1 for<br>Voltage and<br>associated<br>Interrupting<br>Ratings|0.06<br>~~ee~~<br>~~**e**e~~|0.60<br>~~ee~~<br>~~es~~<br>~~es~~|Y<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~|
|0685T1000-XX<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|1A<br> ~~ee~~<br>~~ee~~|T1<br>~~ee~~|0.460|0.597||0.12<br>~~ee~~<br>~~**e**e~~|0.60<br>~~ee~~<br>~~es~~<br>~~es~~<br>~~es~~|Y<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~|
|0685T1250-XX<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.25A<br> ~~ee~~<br>~~ee~~|TP|0.300|0.541||0.20<br>~~**e**e~~<br>~~ee~~|0.68<br>~~es~~<br>~~es~~<br>~~e~~<br>~~es~~<br>~~ee~~<br>~~es~~|Y<br>~~ee~~<br>~~e~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~e~~<br>~~ee~~|
|0685T1500-XX<br> <br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~es~~|1.5A<br> ~~ee~~<br>~~ee~~<br>|TR|0.190|0.436||0.23<br>~~**e**e ~~<br>~~ee~~|0.65<br> ~~es ~~<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~es~~|Y<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~|
|0685T2000-XX<br>~~ee~~<br>~~ee~~<br>~~es es~~<br>~~ee~~|2A<br>~~ee~~<br>~~es~~<br>|T2<br>|0.110|0.325||0.63<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.65<br>~~es ~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|Y<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|0685T2500-XX<br>~~ee~~<br>~~es es~~<br>~~ee~~<br>~~ee~~|2.5A<br>~~es~~<br>~~ee~~|TT<br>~~ee~~|0.068|0.274||1.07<br>~~ee~~<br>~~**e**e ee~~|0.69<br>~~es ~~<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~|
|0685T3000-XX<br>~~es es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|3A<br>~~es~~<br>~~ee~~<br>~~ee~~|T3<br>~~ee~~|0.050|0.232||1.64<br>~~ee~~<br>~~**e**e ee~~|0.70<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~e~~<br>~~ee~~|Y<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~e~~<br>~~ee~~|Y<br>~~ee~~<br>~~e~~|
|0685T3500-XX<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|3.5A<br> ~~ee~~<br>~~ee~~<br>|TZ<br>~~ee~~|0.040|0.194||2.28<br>~~**e**e ee~~|0.68<br>~~ee~~<br>~~ee~~<br>~~e~~<br>~~ee~~<br>~~es~~|Y<br>~~ee~~<br>~~ee~~<br>~~e~~<br>~~ee~~|Y<br>~~e~~|
|0685T4000-XX<br> <br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|4A<br> ~~ee~~<br>~~ee~~<br>~~ee~~|T4<br>~~ee~~|0.030|0.195||2.56<br>~~**e**e ee~~<br>~~ee~~<br>~~**e**e~~|0.78<br>~~ee ~~<br>~~e~~<br>~~ee~~<br>~~ee~~<br>~~es~~<br>~~es~~|Y<br> ~~ee~~<br>~~e~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~e~~<br>~~ee~~|
|0685T5000-XX<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|5A<br>~~ee~~|T5|0.020|0.157||5.3<br>~~**e**e~~|0.79<br>~~ee ~~<br>~~es~~<br>~~es~~<br>~~es~~|Y<br> ~~ee~~<br>~~ee~~<br>~~ee~~|Y|
|0685T6000-XX<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~Po~~|6A<br> ~~ee~~<br>~~ee~~|T6|0.0145|0.153||6.0<br>~~**e**e~~<br>~~ee~~|0.92<br>~~es~~<br>~~es~~<br>~~e~~<br>~~es~~<br>~~ee~~<br>~~es~~|Y<br>~~ee~~<br>~~e~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~e~~<br>~~ee~~|
|0685T7000-XX<br> <br>~~ee~~<br>~~ee~~<br>~~Po~~|7A<br> ~~ee~~<br>~~ee~~|T7|0.0115|0.139||6.9<br>~~**e**e ~~<br>~~ee~~|0.97<br> ~~es ~~<br>~~es~~<br>~~ee~~<br>~~es~~|Y<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~|
|0685T8000-XX<br>~~ee~~<br>~~Po~~|8A<br>~~ee~~|T8|0.0095|0.135||8.0<br>~~ee~~<br>~~ee~~|1.08<br>~~es ~~<br>~~ee~~<br>~~es~~<br>~~ee~~|Y<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~<br>~~ee~~|



All test for ratings 750mA - 5A were conducted with fuse samples soldered on a PCB (1.6mm thick) test board with copper traces measuring 0.035 mm (35μm) nominal thickness (1 oz. clad), 5mm wide and 100 mm overall length. 

All test for ratings 6A-8A were conducted with fuse samples soldered on a PCB (1.6mm thick) test board with copper traces measuring 0.070 mm (70μm) nominal thickness (2 oz. clad), 7.5mm wide and 100 mm overall length. Device designed to be mounted with marking facing up. 

Device designed to carry rated current for 4 hours minimum. It is recommended that device be operated continuously at no more than 80% of rated current when in a +25°C ambient, with further derating at elevated ambient temperatures. 

Specifications subject to change without notice 

**Bel Fuse Inc.** 206 Van Vorst Street Jersey City, NJ 07302 USA 

+1 201.432.0463 Bel.US.CS@belf.com **belfuse.com/circuit-protection** 

© 2019 Bel Fuse, Inc. 

Rev. C1T Jan2019 

**3** / **4** 

## Type C1T 

## **Environmental Specifications** 

|Shock Resistance|MIL-STD-202G, Method 213B, Test Condition 1<br>(100 G's peak for 6 milliseconds; Sawtooth<br>waveform)|
|---|---|
|Vibration Resistance|MIL-STD-202G, Method 201A (10-55 Hz, 0.06<br>inch,total excursion).|
|Salt Spray Resistance|MIL-STD-202G, Method 101E, Test Condition B<br>(48 hrs.).|
|Insulation Resistance|MIL-STD-202G, Method 302, Test Condition A<br>(After Opening)10,000 ohms minimum.|
|Solderability|MIL-STD-202G, Method 208H|
|Resistance to solder<br>Heat|MIL-STD-202G, Method 210F, Test Condition C.<br>Top Side(260℃,20 sec)<br>MIL-STD-202G, Method 210F, Test Condition D.<br>Bottom Side(260℃,10 sec)|
|Thermal Shock|MIL-STD-202G, Method 107G, Test Condition B<br>(-65℃to +125℃).|
|Operating<br>Temperature|-55℃to +125℃|
|Moisture Sensitivity<br>Level|1 (According to IPC J-Std-020)|



|High temperature storage|MIL-STD-202 Method 108|
|---|---|
|Temperature cycling|JESD22 Method JA-104,Test Condition B|
|Biased humidity|MIL-STD-202 Method 103, 85C/85% RH with<br>10% operating power for 1000 hrs.|
|Operational life|MIL-STD-202 Method 108, Test Condition D|
|Resistance to solvents|MIL-STD-202 Method 215|
|Mechanical shock|MIL-STD-202 Method 213,Test Condition C|
|Vibration|MIL-STD-202 Method 204|
|Resistance to soldering<br>heat|MIL-STD-202 Method 210,Test condition B|
|Thermal shock|MIL-STD-202 Method 107|
|Solderability|J-STD-002|
|Board flex(SMD)|AEC-Q200-005|
|Terminal strength|AEC-Q200-006|
|Electrical characterization|3 temperature electrical|



## **Soldering Parameters** 

IR Reflow Profile (IPC/JEDEC J-STD-020D) 

## **Preheat & Soak** 

|**Preheat & Soak**||||
|---|---|---|---|
|Temperature min (Tsmin)|||150℃|
|Temperature max (Tsmax)<br>Time (Tsminto Tsmax) (ts)<br>Average ramp-up rate (Tsmaxto Tp)<br>Liquidous temperature (TL)|||200℃<br>60-120 seconds<br>3℃/second max.<br>217℃|
|Time at liquidous(tL)|||60-150 seconds|
|Peak temperature (Tp)|||260℃max|
|Time (tp) within 5℃of the specified<br>classification temperture (Tc)|||30 seconds|
|Average ramp-down rate (Tpto Tsmax)|||6℃/second max.|
|Time 25℃to peak temperature|||8 minutes max.|
|||||
|Lead-free Wave Soldering Profile||||
|Wave Soldering Parameter<br>Average ramp-up rate<br>Heating rate during preheat<br>Final preheat temperature<br>Peak temperature Tp|200℃/ second<br>typical 1 - 2℃/ second<br>Max 4℃/ second<br>within 125℃of soldering<br>temperature<br>260℃|||
|Time within +0℃/ -5℃of actual<br>peak temperature<br>Ramp-down rate|10 seconds<br>5℃/ second max.|||



Specifications subject to change without notice 

**Bel Fuse Inc.** 

206 Van Vorst Street Jersey City, NJ 07302 USA 

+1 201.432.0463 Bel.US.CS@belf.com **belfuse.com/circuit-protection** 

© 2019 Bel Fuse, Inc. 

Rev. C1T Jan2019 

**4** / **4** 

## Type C1T 

## **Fuse FGNO Explanation 0685 T [XXXX] -XX 0685T=C1T; [XXXX]=Ampere Rating; XX=See Ordering Information as below** 

|Fraction|Decimal|Milliamps|Bel FGNO[XXXX]|
|---|---|---|---|
|3/4|0.750|750|0750|



|Fraction|Decimal|Amps|Bel FGNO[XXXX]|
|---|---|---|---|
||1.0|1|1000|
|1-1/4|1.25|1.25|1250|
|1-1/2|1.50|1.5|1500|
||2.0|2|2000|
|2-1/2|2.5|2.5|2500|
||3.0|3|3000|
|3-1/2|3.5|3.5|3500|
||4.0|4|4000|
||5.0|5|5000|
||6.0|6|6000|
||7.0|7|7000|
||8.0|8|8000|



## **Mechanical Dimensions** 

## **Ordering Information** 

## **Packaging** 

|Packaging Tape & Reel|Packaging Specification|Quantity|Quantity & Packaging Code|
|---|---|---|---|
|8 mm wide tape with 7 inches Diameter reel|EIA Standard 481-E|5000|0685TXXXX-01|



Specifications subject to change without notice 

**Bel Fuse Inc.** 206 Van Vorst Street Jersey City, NJ 07302 USA 

+1 201.432.0463 Bel.US.CS@belf.com **belfuse.com/circuit-protection** 

© 2019 Bel Fuse, Inc. 

Rev. C1T Jan2019