Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series 429 Series 1206 Fast-Acting Fuse RoHS Pb Description The 429 Series Fast-Acting SMF is a small (1206 size) thinfilm device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is Halogen-Free, Lead-Free and meets the requirements of the RoHS directive. Features • RoHS compliant and Lead-Free 7A device available-add ‘L’ suffix to part number. • Halogen-Free 7A device available-add ‘HF’ suffix to the part number Agency Approvals AGENCY • For new designs up to 5A please consult the 433 or 466 Series AGENCY FILE NUMBER AMPERE RANGE E10480 7A Applications 29862 7A Secondary protection for space constrained applications such as: Electrical Characteristics for Series • Cell phones • DVD players • Battery packs • Hard disk drives. • Digital cameras % of Ampere Rating Opening Time at 25OC 100% 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum Additional Information Datasheet Resources Samples Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2sec) 7.00 007. 24 35A @24VAC/VDC 0.009 4.900 Agency Approvals x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. © 2015 Littelfuse, Inc. Specifications are subject change recommended. without notice. Specifications are subject to change without notice. Application testing istostrongly Revised: 04/30/15 Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Average Time Current Curves 7A Temperature Re-rating Curve 100 TIME IN SECONDS 10 1 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)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. 0.001 0.1 1 10 CURRENT IN AMPERES 100 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 – 180 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 260°C, 10 seconds max. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/30/15 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 Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Product Characteristics Materials Body: Epoxy Substrate Terminations, RoHS Compliant Device (429L): 100% Tin over Nickel over Copper Element Cover Coat: Conformal Coating NOTE: Do not use alcohol-based cleaners or solvents with 429 Series Thin-Film Fuses as it may damage the coating. Operating Temperature – 55OC to 90OC. Consult temperature re-rating chart. For operation above 90°C contact Littelfuse. Thermal Shock Withstands 5 cycles of – 55OC to 125OC Dimensions Humidity MIL-STD-202, Method 103 Condition D Vibration Withstands 10 – 55 Hz per MILSTD-202, Method 201 and 10-2000 Hz at 20 g’s per MIL-STD-202, Method 204, Condition D. Insulation Resistance (After Opening) Greater than 10,000 ohms Resistance to Soldering Heat MIL-STD-202, Method 210, Condition D Part Marking System RECOMMENDED PAD LAYOUTS 3.175±0.127 (0.125"±0.005") 3.81 (.150") Marking Code 429L 7 1.52±0.127 (0.060"±0.005") 1.52 (.060") 1.14 (.045") 2.03 (.080") REFLOW SOLDER Series Part Numbering System 2.489±0.254 (0.098"±0.010") 1.12 (.044") REF. 0429 007. WRM L HF SERIES .635 (.025") 1.143+0.0/-0.152 (.045"+0.0/-0.006") AMP Code Refer to Amp Code Column of Electrical characteristics table QUANTITY Code WRM = 3000 pieces, Tape and Reel L = Lead-Free device and RoHS compliant device ‘HF’ SUFFIX HALOGEN FREE ITEM Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape & Reel – 8mm tape EIA-481 Rev. D (IEC 60286, part 3) 3000 WRM © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/30/15