Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series 429 Series Fuse 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. 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 Agency File Number Ampere Range E10480 7A LR29862 7A * For new designs up to 5A please consult the 433 or 466 Series Applications Electrical Characteristics for Series Secondary protection for space constrained applications such as: % of Ampere Rating Opening Time at 25OC * Cell phones * DVD players 100% 4 hours, Minimum * Battery packs * Hard disk drives. 200% 5 sec., Maximum * Digital cameras 300% 0.2 sec., Maximum 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 35 amperes @ voltage, VAC/VDC 0.00925 3.6000 Agency Approvals x x 1. Measured at 10% of rated current, 25C. 2. Measured at rated voltage. (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/429.html for current information. 33 Revised: Jun 16 , 2011 429 Series 429 Series This series is Halogen-Free, Lead-Free and meets the requirements of the RoHS directive. Mount Fuses IntroductionSurface to Circuit Protection Thin Film > 1206 Size > Very Fast-ActingTransientology > 429 Series Average Time Current Curves 7A Temperature Rerating Curve 100 TIM E IN SEC O N D S 10 1 0.1 Note: 0.01 1. Derating 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 0.001 0.1 2. The temperature derating curve represents the nominal conditions. For questions about temperature derating curve, please consult Littelfuse technical support for assistance. 1 10 C U R R EN T IN A M PER ES 100 Soldering Parameters Pb - Free assembly Pre Heat - Temperature Min (Ts(min)) 150C - Temperature Max (Ts(max)) 200C - Time (Min to Max) (ts) 60 - 180 secs Average ramp up rate (Liquidus Temp (TL) to peak 5C/second max TS(max) to TL - Ramp-up Rate 5C/second max Reflow - Temperature (TL) (Liquidus) 217C - Temperature (tL) 60 - 150 seconds Peak Temperature (TP) 250+0/-5 C Time within 5C of actual peak Temperature (tp) 20 - 40 seconds Ramp-down Rate 5C/second max Time 25C to peak Temperature (TP) 8 minutes Max. Do not exceed 260C Wave Soldering 429 Series 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 25C to peak) Time 260C, 10 seconds max. 34 (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/429.html for current information. Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Product Characteristics Operating Temperature - 55OC to 90OC. Consult temperature rerating chart. For operation above 90C contact Littelfuse. Thermal Shock Withstands 5 cycles of - 55OC to 125OC Dimensions Humidity MIL-STD-202F, Method 103B Condition D Vibration Withstands 10 - 55 Hz per MIL-STD202F, Method 201A and 10-2000 Hz at 20 G's per MIL-STD-202F, Method 204D, Condition D. Insulation Resistance (After Opening) Greater than 10,000 ohms Resistance to Soldering Heat MIL-STD-202G, Method 210F, Condition D Part Marking System R EC O M M EN D ED PA D LA YO U TS 3.18 (.125") 3.81 (.150") Series Marking Code 429L 7 1.52 (.060") 1.52 (.060") 1.14 (.045") 2.03 (.080") R EFLO W SO LD ER 429 Series 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. Part Numbering System 1.12 (.044") R EF. 2.49 (.098") R EF. 0429 007. WRM L HF 1.14 (.045") SERIES Amp Code .635 (.025") 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 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 (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/429.html for current information. 35 429 Series