C1F 8

Type C1F Surface Mount Fast Acting Chip Fuse 

C1F Series – 1206 Size RoHS Compliant 

## **Features** 

- Fast Acting, with improved surge withstand performance 

- Small size, 1206 SMD 

- Current rating from 250mA to 8A, fuse marked with ampere code 

- 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 

- Full compliance with EU Directive 2011/65/EU and amending directive 2015/863 (MSL = 1) 

- Halogen Free and Lead Free 

- AEC-Q Compliant 

- Meets Bel automotive qualification* 

- - Largely based on internal AEC-Q test plan 

## **Applications** 

- Automotive Navigation System 

- Thin film transistor LCD flat-panel display screen 

- Notebook 

- PC computer 

- Office electronic equipment 

- Industrial equipment 

## **AEC-Q Compliant** 

- Medical equipment 

- POE, POE+ 

- LCD / LED monitor 

- Power supply 

- LCD / LED TV                                                                                 LEAD FREE = 

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

Example: 

250mA E 2.5A T moe | © | pee | OF 375mA H 3A 3 om+} 500mA | s J | 3.5A she__+__| oF Z 750mA M 4A 4 ee ee ee 1A 1 5A 5 Pw Tt Thm) 1.25A P 6A 6 es a 1.5A R 7A 7 Pim | « | m | 7 2A 2 8A 8 pm | 2 | wm | s | 

- DC-DC Converter                                                                    HALOGEN FREE = 

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

||Testing Current<br>Blow Time<br>Minimum<br>Maximum<br>100%<br>4 Hrs.<br>N/A|Testing Current<br>Blow Time<br>Minimum<br>Maximum<br>100%<br>4 Hrs.<br>N/A|
|---|---|---|
|||200%<br>N/A<br>5 Sec|
|||300%<br>N/A<br>0.2 Sec|
|**Safety Agency Approvals**|||
||Safety<br>Agency|Safety Agency<br>Certificate<br>Ampere Rating/<br>Voltage Rating<br>Ampere Range / Volt<br>@ I.R. ability*|
|||250mA–6A/100A@ 125V|
|||E506667<br>250mA–8A/125V AC<br>AC<br>/50A@ 63V DC|
|||/63V DC<br>7A–8A/35A@ 125V AC|
|||/50A@ 63V DC|
|**Physical Specifications**<br>Materials<br>Body : Ceramic Substrate<br>Terminations : Ag / Ni / Sn (100% Lead-free)<br>Element Cover Coating : Lead-free Glass<br>Marking<br>On Fuse :<br>Marking Code<br>On Label :<br>*I.R.=Interrupting Rating=Short Circuit Rating(Amps)<br>~~TT~~<br>~~PC~~<br>~~[t~i“‘CSsCs(‘(‘i;TTOTTTOUUUUUS~~<br>~~FR~~<br>~~_t—“CsSOSOSOOOOOOCOCOCOCOCOCOCOCSCSC“‘CSNCNCS~~|||
|||"bel", "C1F", "Current Rating", "Voltage Rating", "Interrupting Rating",|
|||"Appropriate SafetyLogos" and "<br>","<br>"(China RoHS compliant).|
|POWER|POWER|Specifications subject to change without notice|



**belfuse.com/circuit-protection** 

**2** / **4** 

## Type C1F 

## **Temperature Derating Curve                               Average Time Current Curve** 

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## **Electrical Specifications** 

|Part Number<br>~~es ee~~|Ampere<br>Rating<br>(A)<br>~~ee~~|Marking<br>Code|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>~~ee~~|Agency<br>Approvals|
|---|---|---|---|---|---|---|---|---|
|||||||||~~ee~~<br>~~ee~~|
|0685F0250-XX<br>~~es ee~~|250mA<br>~~ee~~|E|2.30|0.813|See Table of<br>Safety Approvals<br>on Page 1 for<br>Voltage and<br>associated<br>Interrupting<br>Ratings|0.0002<br>~~ee~~|0.20<br>~~ee~~<br>~~ee~~|Y<br>~~ee~~<br>~~ee~~|
|0685F0375-XX<br>~~es ee~~<br>~~es~~|375mA<br>~~ee~~|H|1.25|0.789||0.0007<br>~~ee~~<br>~~e~~|0.30<br>~~ee~~<br>~~ee~~<br>~~e~~~~**e**~~<br>~~e~~|Y<br>~~ee~~<br>~~ee~~<br>~~**e**~~|
|0685F0500-XX<br>~~es~~|500mA|J|0.87|0.693||0.0015<br>~~e~~|0.35<br>~~e~~~~**e**~~<br>~~e~~|Y<br>~~**e**~~|
|0685F0750-XX<br>~~es~~<br>~~es~~<br>~~ee~~|750mA<br>|M<br>|0.43<br>|0.476||0.0051<br>~~e~~<br>~~ee~~|0.36<br>~~e~~~~**e**~~<br>~~e~~<br>~~ee~~<br>~~**e**e~~|Y<br>~~**e**~~<br>~~ee~~|
|0685F1000-XX<br>~~es~~<br>~~ee~~|1A<br>~~es~~|1<br>~~ss~~|0.28<br>~~ss~~|0.421||0.012<br>~~ee~~<br>~~e~~|0.42<br>~~ee~~<br>~~**e**e~~<br>~~eee~~|Y<br>~~ee~~<br>~~eee~~|
|0685F1250-XX<br>~~es~~<br>~~ee~~|1.25A<br>~~es~~|P<br>~~ss~~|0.210<br>~~ss~~|0.411||0.023<br>~~ee~~<br>~~e~~|0.51<br>~~ee~~<br>~~**e**e~~<br>~~eee~~|Y<br>~~ee~~<br>~~eee~~|
|0685F1500-XX<br>~~ee ~~<br>~~es~~<br>~~es~~|1.5A<br> ~~es ~~<br>|R<br> ~~ss~~|0.165<br>~~ss~~|0.400||0.040<br>~~e~~<br>~~ee~~|0.60<br>~~**e**e~~<br>~~eee ~~<br>~~ee~~<br>~~**e**e~~|Y<br> ~~eee~~<br>~~ee~~|
|0685F2000-XX<br>~~es~~<br>~~es es~~|2A<br>~~es~~|2<br>~~ed~~|0.068|0.194||0.085<br>~~ee~~<br>~~e~~|0.39<br>~~ee~~<br>~~**e**e~~<br>~~eee~~|Y<br>~~ee~~<br>~~ee~~|
|0685F2500-XX<br>~~es~~<br>~~es es~~|2.5A<br>~~es~~|T<br>~~ed~~|0.049|0.198||0.15<br>~~ee~~<br>~~e~~|0.50<br>~~ee~~<br>~~**e**e~~<br>~~eee~~|Y<br>~~ee~~<br>~~ee~~|
|0685F3000-XX<br>~~es es~~<br>~~es~~|3A<br>~~es~~|3<br>~~ed~~|0.039|0.166||0.19<br>~~e~~<br>~~e~~|0.50<br>~~**e**e~~<br>~~eee~~<br>~~e~~~~**e**~~<br>~~e~~|Y<br>~~ee~~<br>~~**e**~~|
|0685F3500-XX<br>~~es~~|3.5A|Z|0.032|0.164||0.21<br>~~e~~|0.57<br>~~e~~~~**e**~~<br>~~e~~|Y<br>~~**e**~~|
|0685F4000-XX<br>~~es~~<br>~~es~~<br>~~ee~~|4A|4|0.026|0.164||0.33<br>~~e~~<br>~~ee~~|0.66<br>~~e~~~~**e**~~<br>~~e~~<br>~~ee~~<br>~~**e**e~~|Y<br>~~**e**~~<br>~~ee~~|
|0685F5000-XX<br>~~es~~<br>~~ee~~<br>~~ee~~|5A<br>~~es~~<br>|5<br>~~ss~~|0.020<br>~~ss~~|0.164||0.83<br>~~ee~~<br>~~e~~|0.82<br>~~ee~~<br>~~**e**e~~<br>~~e~~~~**e**e~~|Y<br>~~ee~~<br>~~eee~~|
|0685F6000-XX<br>~~es~~<br>~~ee~~<br>~~ee es~~<br>~~ee~~|6A<br>~~es~~<br>~~es~~|6<br>~~ss~~|0.015<br>~~ss~~|0.163||1.3<br>~~ee~~<br>~~e~~<br>~~e~~|0.98<br>~~ee~~<br>~~**e**e~~<br>~~e~~~~**e**e~~<br>~~eee~~|Y<br>~~ee~~<br>~~eee~~<br>~~**ee**~~|
|0685F7000-XX<br>~~ee~~<br>~~ee es~~<br>~~ee~~|7A<br>~~es ~~<br>~~es~~<br>~~es~~|7<br> ~~ss~~<br>~~ss~~|0.012<br>~~ss~~<br>~~ss~~|0.154||2.2<br>~~e~~<br>~~e~~<br>~~ee~~|1.08<br>~~**e**e~~<br>~~e~~~~**e**e~~<br>~~eee~~<br>~~ee~~<br>~~ee~~|Y<br>~~eee~~<br>~~**ee**~~<br>~~ee~~|
|0685F8000-XX<br>~~ee es~~<br>~~ee~~|8A<br>~~es~~<br>~~es~~|8<br>~~ss~~|0.010<br>~~ss~~|0.148||3.5<br><br>~~e~~<br>~~ee~~|1.18<br>~~**e**e ~~<br>~~eee~~<br>~~ee~~<br>~~ee~~|Y<br> ~~eee~~<br>~~**ee**~~<br>~~ee~~|



NOTES:  Test Conditions 

All test for ratings 250mA - 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 100mm 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 100mm 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.** 

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

300 Executive Drive, Suite 300 West Orange, NJ 07052 USA 

© 2025 Bel Fuse, Inc. 

Rev. C1F Feb2025 

**3** / **4** 

## Type C1F 

## **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, totalexcursion).|
|Salt Spray Resistance|MIL-STD-202G, Method 101E, Test Condition B<br>(48hrs.).|
|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 1000hrs.|
|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)|IR Reflow Profile (IPC/JEDEC J-STD-020D)|
|---|---|
|**Preheat & Soak**<br>Temperature min (Tsmin)<br>Temperature max (Tsmax)<br>Time (Tsminto Tsmax) (ts)|)<br>)<br>150℃<br>200℃<br>60-120 seconds|
|Average ramp-up rate (Tsmaxto Tp)|3℃/second max.|
|Liquidous temperature (TL)<br>Time at liquidous(tL)|217℃<br>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|Lead-free Wave Soldering Profile|
|---|---|
|Wave Soldering Parameter||
|Average ramp-up rate|200℃/ second|
|Heating rate during preheat|typical 1 - 2℃/ second<br>Max 4℃/ second|
|Final preheat temperature|within 125℃of soldering<br>temperature|
|Peak temperature Tp|260℃|
|Time within +0℃/ -5℃of actual<br>peak temperature|10 seconds|
|Ramp-down rate|5℃/ second max.|



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Specifications subject to change without notice 

**Bel Fuse Inc.** 300 Executive Drive, Suite 300 West Orange, NJ 07052 USA 

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

© 2025 Bel Fuse, Inc. 

Rev. C1F Feb2025 

**4** / **4** 

## Type C1F 

## **Fuse FGNO Explanation 0685 F [XXXX] -XX 0685F=C1F; [XXXX]=Ampere Rating; XX=See Ordering Information as below** 

|Fraction|Decimal|Milliamps|Bel FGNO[XXXX]||Fraction|Decimal|Amps|Bel FGNO[XXXX]|
|---|---|---|---|---|---|---|---|---|
|1/4|0.250|250|0250|||1.0|1|1000|
|3/8|.375|375|0375||1-1/4|1.25|1.25|1250|
|1/2|.500|500|0500||1-1/2|1.50|1.5|1500|
|3/4|.750|750|0750|||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|0685FXXXX-01|



## tin Pe. bel SOLUTIONS & 

Specifications subject to change without notice 

**Bel Fuse Inc.** +1 201.432.0463 300 Executive Drive, Suite 300 Bel.US.CS@belf.com West Orange, NJ 07052 USA **belfuse.com/circuit-protection** © 2025 Bel Fuse, Inc. Rev. C1F Feb2025