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 • 35A interrupt rating at • Maximum protection of 32VDC sensitive circuits as fuses Agency Approvals • Small size with current are designed to open ratings of 0.25 to 5.0 consistently in <5sec at AGENCY AGENCY FILE NUMBER AMPERE RANGE amperes 200% overload. E10480 0.250 - 5.0A • RoHS compliant, Lead- • Enhanced Breaking Free and Halogen-Free Capacity, High l2t 29862 0.250 - 5.0A Applications Electrical Characteristics for Series Secondary protection for space constrained applications such as: % of Ampere Ampere Opening Time at 25OC • Cell phones • DVD players Rating Rating • Battery packs • Hard disk drives. 100% 0.250A - 5A 4 hours, Minimum • Digital cameras 200% 0.375A - 5A 5 secs., Maximum 300% 0.250A 5 secs., Maximum Additional Information 300% 0.375A - 5A 0.2 sec., Maximum Datasheet Resources Samples Electrical Specifications by Item Ampere Max Voltage Nominal Cold Nominal Nom Nom Power Agency Approvals Amp Interrupting Rating Rating Resistance Melting Voltage Drop Dissipation Code Rating (A) (V) (Ohms) I2t (A2sec) (mV) (W) 0.250 .250 32 0.36001 0.0025 92.49 0.0231 x x 0.375 .375 32 0.19301 0.0035 84.64 0.03174 x x 0.500 .500 32 0.16001 0.0053 93.35 0.04668 x x 0.750 .750 32 0.10501 0.0120 101.84 0.07638 x x 1.00 001. 32 0.07301 0.0200 87.45 0.08745 x x 1.25 1.25 32 0.06001 0.0350 96.37 0.12046 x x 1.50 01.5 32 35A 0.04701 0.0560 86.70 0.13005 x x 1.75 1.75 32 @32VDC2 0.03901 0.0750 81.13 0.14198 x x 2.00 002. 32 0.03001 0.1000 70.62 0.14120 x x 2.50 02.5 32 0.02001 0.1560 55.25 0.13813 x x 3.00 003. 32 0.01701 0.2032 60.58 0.18740 x x 3.50 03.5 32 0.01501 0.3017 57.84 0.20244 x x 4.00 004. 32 0.01051 0.3084 57.00 0.22800 x x 5.00 005. 32 0.00851 0.5310 52.44 0.26220 x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. © 2018 Littelfuse, Inc. Specifications are subject to change without nSoptieccei.fi Acaptpiolincsa taioren steusbtjiencgt itso s ctrhoanngglye rweicthoomumt ennodtiecde.. Revised: 12/13/18

Surface Mount Fuses Thin Film > 0402 Size > Very Fast-Acting > 435 Series Temperature Re-rating Curve Average Time Current Curves 100 .25A .375A .5A .75A 1A 1.25A 1.5A 1.75A 2A 2.5A 3A 3.5A 4A 5A 10 S 1 D N O C E S N E I M TI 0.1 Note: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.01 Example: For continuous operation at 70 degrees celsius, the fuse should be deratedas follows: I = (0.75)(0.80)I = (0.60)I RAT RAT 2. The temperature derating curve represents the nominal conditions. For questions 0.001 about temperature derating curve, please consult Littelfuse technical support 0.1 1.0 10.0 100.0 for assistance. CURRENT IN AMPERES Soldering Parameters Reflow Condition Pb – Free assembly tP T P Critical Zone - Temperature Min (T ) 150°C Ramp-up TL to TP s(min) T Pre Heat -- TTeimmep e(Mraitnu rteo MMaaxx )( T(ts()max)) 2600 0–° C120 secs eruTS(maxL) tL s ta Average ramp up rate (Liquidus Temp re Ramp-down 5°C/second max p Preheat (TL) to peak mTS(min) T to T - Ramp-up Rate 5°C/second max eT tS S(max) L - Temperature (T) (Liquidus) 217°C Reflow L 25 - Temperature (t) 60 – 150 seconds time to peak temperature L (t 25ºC to peak) Time Peak Temperature (T ) 250+0/-5 °C P Time within 5°C of actual peak 20 – 40 seconds Temperature (t ) p Ramp-down Rate 5°C/second max Time 25°C to peak Temperature (T ) 8 minutes Max. P Do not exceed 260°C Wave Soldering 260°C, 10 seconds max. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/13/18

Surface Mount Fuses Thin Film > 0402 Size > Very Fast-Acting > 435 Series Product Characteristics Body: Epoxy / Glass Substrate; –55°C to 90°C. Parts with ‘HF’ suffix: Halogen Free Epoxy / Glass Operating Consult temperature re-rating curve chart. Materials Temperature For operation above 90°C please contact Terminations: 100% Tin over Nickel over Copper Littelfuse. Device Weight: 0.316mg Thermal Shock Withstands 5 cycles of –55°C to 125°C Terminal MIL-STD-202, Method 211, Test Condition A Strength Vibration MIL-STD-202, Method 201 Insulation After Opening: Greater than 10,000Ohms Resistance Dimensions Part Marking System Amp Marking A Marking code varies Code Code with amperage. .991 +/- .051 Refer to Part Marking .250 X (.039" +/- .002") System chart. .375 B .508 +/- .051 .500 (.020" +/- .002") .750 001. .229 +/- .102 (.009" +/- .004") 1.25 0(..031330" ++//-- ..100024") C 0(..021922" ++//-- ..100024") 01.5 D.2159 +/- .0889 1.75 (.0085" +/- .0035") Reflow solder 002. recommended Sn Cu mounting pad dimensions 02.5 .584 003. (.023") 03.5 .381 1.55 (.015") (.061") 004. 005. .558 (.022") Part Numbering System A B C D 0435 002. K R HF S inch min 0.037 0.018 0.008 0.005 inch max 0.041 0.022 0.016 0.012 SERIES mm min 0.94 0.457 0.190 0.127 Refer to Amp Code column in the mm max 1.04 0.559 0.394 0.305 Electrical Specifications table. The dot is positioned at the end of the number sequence with whole ratings and within for fractional ratings. Packaging Example: 1.5 amp product is 043501.5KRHF (2 amp product shown) QUANTITY Code Packaging Packaging Quantity & Quantity K = 10,000 Pieces Option Specification Packaging Code PACKAGING Code EIA-481 Rev. R = Tape and Reel 8mm Tape HALOGEN FREE ITEM D (IEC 60286, 10000 KR and Reel part 3) “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. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/13/18