EOL – Last Buy Date is December 31, 2019 The replacement series is the C1T(0685Txxxx-01) Type C1S The replacement series is the C1T, (0685Txxxx-01). Surface Mount Slow Blow Chip Fuse C1S Series – 1206 Size RoHS 2 Compliant Features - Slow Blow - Small size, 1206 SMD - Current rating from 750mA to 5A - 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 - RoHS 2 compliant (MSL = 1) - Halogen Free - Lead Free Applications - Notebook - LCD monitor - PC computer - Office electronic equipment - Industrial equipment - Medical equipment - POE, POE+ - LCD / LED monitor - Power supply - LCD / LED TV LEAD FREE = - DC-DC Converter HALOGEN FREE = Electrical Characteristics (UL STD.248-14) Safety Agency Approvals Testing Blow Time Safety Safety Voltage Rating Ampere Range / Volt Current Minimum Maximum Agency Agency (V) @ I.R. ability* Certificate 100% 4 Hrs. N/A 200% 1 Sec 120 Sec 750mA-5A/ 300% 0.1 Sec 3 Sec E20624 750mA-5A/63V AC&DC@50A 63V AC&DC 800% 0.002 Sec 0.05 Sec *I.R.= Interrupting Rating = Short Circuit Rating(Amps) Physical Specifications Body : Ceramic Substrate Materials Terminations : Ag / Ni / Sn (100% Lead-free) Element Cover Coating : Lead-free Glass On Fuse : None Marking On Label : "bel", "C1S", "Current Rating", "Voltage Rating", "Interrupting Rating", "Appropriate Safety Logos" and " ", " "(China RoHS compliant). Specifications subject to change without notice belfuse.com/circuit-protection

EOL – Last Buy Date is December 31, 2019 Type C1S The replacement series is the C1T(0685Txxxx-01) 2 / 4 Temperature Derating Curve Average Time Current Curve Electrical Specifications Nominal Ampere Nominal Nominal Voltage and Melting I²T Power Agency Approvals Catalog Cold Volt-drop Rating Interrupting @10 In Dissipation Number Resistance @100% In (A) Ratings (A² Sec) @100% In (ohms) (Volt) (W) C1S 750 750mA 0.350 0.333 0.01 0.25 Y C1S 1 1A 0.285 0.349 0.05 0.35 Y C1S 1.25 1.25A 0.225 0.346 0.14 0.43 Y C1S 1.5 1.5A 0.182 0.348 0.20 0.52 Y See Table of C1S 2 2A 0.105 0.254 Safety Approvals on 0.26 0.51 Y Page 1 for Voltage C1S 2.5 2.5A 0.072 0.221 and associated 0.40 0.55 Y Interrupting Ratings C1S 3 3A 0.050 0.182 0.83 0.55 Y C1S 3.5 3.5A 0.040 0.171 1.18 0.60 Y C1S 4 4A 0.032 0.160 2.05 0.64 Y C1S 5 5A 0.022 0.140 3.10 0.70 Y Consult manufacturer for other ratings Specifications subject to change without notice Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street Bel.US.CS@belf.com Jersey City, NJ 07302 USA belfuse.com/circuit-protection © 2019 Bel Fuse, Inc. Rev. C1S Sep2019

EOL – Last Buy Date is December 31, 2019 Type C1S The replacement series is the C1T(0685Txxxx-01) 3 / 4 Environmental Specifications MIL-STD-202G, Method 213B, Test Condition 1 Shock Resistance (100 G's peak for 6 milliseconds; Sawtooth waveform) Vibration Resistance MIL-STD-202G, Method 201A (10-55 Hz, 0.06 inch, total excursion). Salt Spray Resistance MIL-STD-202G, Method 101E, Test Condition B (48 hrs.). MIL-STD-202G, Method 302, Test Condition A Insulation Resistance (After Opening) 10,000 ohms minimum. Solderability MIL-STD-202G, Method 208H MIL-STD-202G, Method 210F, Test Condition C. Top Side (260℃,20 sec) Resistance to solder Heat MIL-STD-202G, Method 210F, Test Condition D. Bottom Side (260℃,10 sec) Thermal Shock MIL-STD-202G, Method 107G, Test Condition B (-65℃ to +125℃). Operating Temperature -55℃ to +125℃ Moisture Sensitivity Level 1 (According to IPC J-Std-020) Soldering Parameters IR Reflow Profile (IPC/JEDEC J-STD-020D) Preheat & Soak Temperature min (Tsmin) 1 5 0 ℃ Temperature max (Tsmax) 2 0 0 ℃ Time (Tsmin to Tsmax) (ts) 6 0 - 1 2 0 s e conds Average ramp-up rate (Tsmax to Tp) 3℃/second max. Liquidous temperature (TL) 2 1 7 ℃ Time at liquidous (tL) 60-150 seconds Peak temperature (Tp) 260℃ max Time (tp) within 5℃ of the specified 30 seconds classification temperture (Tc) Average ramp-down rate (Tp to Tsmax) 6℃/second max. Time 25℃ to peak temperature 8 minutes max. Lead-free Wave Soldering Profile Wave Soldering Parameter Average ramp-up rate 200℃ / second typical 1 - 2℃ / second Heating rate during preheat Max 4℃ / second within 125℃ of soldering Final preheat temperature temperature Peak temperature Tp 260℃ Time within +0℃ / -5℃ of actual 10 seconds peak temperature Ramp-down rate 5℃ / second max. Specifications subject to change without notice Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street Bel.US.CS@belf.com Jersey City, NJ 07302 USA belfuse.com/circuit-protection © 2019 Bel Fuse, Inc. Rev. C1S Sep2019

EOL – Last Buy Date is December 31, 2019 Type C1S The replacement series is the C1T(0685Txxxx-01) 4 / 4 Fuse FGNO Explanation 0685 - [XXXX] -XX [XXXX]=Ampere Rating; XX=See Ordering Information as below Fraction Decimal Milliamps Bel FGNO[XXXX] Fraction Decimal Amps Bel FGNO[XXXX] 3/4 0.750 750 0750 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 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 0685-XXXX-S1 Specifications subject to change without notice Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street Bel.US.CS@belf.com Jersey City, NJ 07302 USA belfuse.com/circuit-protection © 2019 Bel Fuse, Inc. Rev. C1S Sep2019