0435002.KRHF

Surface Mount Fuses Thin Film > 0402 Size > Very Fast-Acting > 435 Series 435 Series 0402 Fast-Acting Fuse RoHS Pb Description The 435 Series are fast-acting surface mount thin-film fuses. Their ultra-small size (0402 size) makes them ideal for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is 100% lead-free and meet the requirements of the RoHS directive. New Halogen-Free 435 Series fuses are available–to order use the “HF” suffix. See Part Numbering section for additional information. Features Agency Approvals Agency Agency File Number Ampere Range E10480 0.250A - 5.0A 29862 0.250A - 5.0A Electrical Characteristics for Series % of Ampere Rating Ampere Rating Opening Time at 25OC 100% 0.250A - 5A 4 hours, Minimum 200% 0.375A - 5A 5 secs., Maximum 300% 0.250A 5 secs., Maximum 300% 0.375A - 5A 0.2 sec., Maximum • 50A interrupt rating at 32VDC • Small size with current ratings of 0.25 to 5.0 amperes • RoHS compliant, LeadFree and Halogen-Free • Enhanced Breaking Capacity, High l2t • Maximum protection of sensitive circuits as fuses are designed to open consistently in 0402 Size > Very Fast-Acting > 435 Series 3A 3.5A 4A 5A 1A 1.25A 1.5A 1.75A 2A 2.5A .75A .25A 100 .5A Average Time Current Curves .375A Temperature Re-rating Curve 10 TIME IN SECONDS 1 0.1 Notes: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)IRAT = (0.60)IRAT 2. The temperature derating curve represents the nominal conditions. For questions about temperature derating curve, please consult Littelfuse technical support for assistance. 0.01 0.001 0.1 1.0 10.0 100.0 CURRENT IN AMPERES Soldering Parameters Pb – Free assembly Pre Heat - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 120 secs Average ramp up rate (Liquidus Temp (TL) to peak 5°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds Peak Temperature (TP) 250+0/-5 °C 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 tP TP Critical Zone TL to TP Ramp-up TL TS(max) Temperature Reflow Condition tL Ramp-down TS(min) 25 Preheat tS time to peak temperature (t 25ºC to peak) Time 260°C, 10 seconds max. © 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BO. 11/13/20 Surface Mount Fuses Thin Film > 0402 Size > Very Fast-Acting > 435 Series Product Characteristics Materials Body: Epoxy / Glass Substrate; Parts with ‘HF’ suffix: Halogen Free Epoxy / Glass Terminations: 100% Tin over Nickel over Copper Device Weight: 0.316mg Terminal Strength MIL-STD-202, Method 211, Test Condition A Insulation Resistance After Opening: Greater than 10,000Ohms Operating Temperature –55°C to 90°C. Consult temperature re-rating curve chart. For operation above 90°C please contact Littelfuse. Thermal Shock Withstands 5 cycles of –55°C to 125°C Vibration MIL-STD-202, Method 201 Part Marking System Dimensions Marking code varies with amperage. Refer to Part Marking System chart. A .991 +/- .051 (.039" +/- .002") B Amp Code Marking Code 0.250 X 0.375 .508 +/- .051 (.020" +/- .002") 0.500 0.750 001. .229 +/- .102 (.009" +/- .004") 0.330 +/- .102 (.013" +/- .004") 1.25 +/- .102 C 0.292 (.012" +/- .004") 01.5 1.75 D .2159 +/- .0889 (.0085" +/- .0035") Sn 002. Reflow solder recommended mounting pad dimensions Cu 02.5 003. 03.5 .584 (.023") .381 (.015") 004. 1.55 (.061") 005. .558 (.022") Unit A B C D inch min 0.037 0.018 0.008 0.005 inch max 0.041 0.022 0.016 0.012 mm min 0.94 0.457 0.190 0.127 mm max 1.04 0.559 0.394 0.305 Packaging Part Numbering System Packaging Option Packaging Specification 8mm Tape and Reel (IEC 60286, part 3) EIA-481 Rev. D Quantity Quantity & Packaging Code 10000 KR 0435 002. K R HF S Series Refer to Amp Code column in the Electrical Specifications table. The dot is positioned at the end of the number sequence with whole ratings and within for fractional ratings. Example: 1.5 amp product is 043501.5KRHF (2 amp product shown) Quantity Code K = 10,000 Pieces Packaging Code R = Tape and Reel Halogen Free Item “S” - for .250A only 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. © 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BO. 11/13/20