0429007.WRM LITTELFUSE | Alldatasheet

Document overview

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Technical content

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
  • For new designs up to 5A please consult the 433 or 466 Series % of Ampere rating Opening Time at 25Oc 100% 4 hours, Minimum 200% 5 sec., Maximum 300% 0.2 sec., Maximum

Applications

(A) Amp code max Voltage rating (V) interrupting rating nominal cold resistance (Ohms) nominal melting i2t (A2sec) Agency Approvals 7 .00 007 . 24 35 amperes @ voltage, VAC/VDC 0.00925 3.6000 x x Electrical Specifications by Item 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage.

  • Cell phones
  • Battery packs
  • Digital cameras
  • DVD players
  • Hard disk drives. Secondary protection for space constrained applications such as: Revised: Jun 16 , 2011

Introduction to Circuit ProtectionIntroduction to Circuit Protection Transientology 34 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Surface Mount Fuses

429 Series

Thin Film > 1206 Size > Very Fast-Acting > 429 Series Please refer to www.littelfuse.com/series/429.html for current information. Average Time Current Curves TIME IN SECONDS CURRE NT IN AM PERES 0.01 0.1 0.1 100 10 100 0.001 reflow condition 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 (t p) 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 Soldering Parameters T emperature Rerating Curve Wave Soldering 260°C, 10 seconds max. Note: 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 2. The temperature derating curve represents the nominal conditions. For questions about temperature derating curve, please consult Littelfuse technical support for assistance. Time Te mperature TP TL TS(max) TS(min) tP tL tS time to peak temperature (t 25ºC to peak) Ramp-down Ramp-up Preheat Critical Zone TL to TP

35© 2009 Littelfuse, Inc. Specifications are subject to change without notice. Surface Mount Fuses Thin Film > 1206 Size > Very Fast-Acting > 429 Series Please refer to www.littelfuse.com/series/429.html for current information. Body: Epoxy Substrate T erminations, 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 – 55 OC to 90OC. Consult temperature rerating chart. For operation above 90°C contact Littelfuse. Thermal Shock Withstands 5 cycles of – 55OC to 125OC Humidity MIL-STD-202F, Method 103B Condition D Vibration Withstands 10 – 55 Hz per MIL -STD- 202F , 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 Product Characteristics Dimensions REFLOW SOLDER RECO MME NDE D PAD LAYOUTS 3.81 (.150") 1.52 (.060") 2.03 (.080") .635 (.025") 1.14 (.045") 2.49 (.098") REF. 1.52 (.060") 3.18 (.125") 1.14 (.045") 1.12 (.044") REF. Part Numbering System Packaging Part Marking System packaging Option packaging Specification Quantity Quantity & packaging code Tape & Reel – 8mm tape EIA-481 Rev. D (IEC 60286, part 3) 3000 WRM Series marking code 429L 7 0429 007 . WRM L HF SERIES AMP Code QuANTITy Code L = Lead-Free device and RoHS compliant device Refer to Amp Code Column of Electrical characteristics table WRM = 3000 pieces, Tape and Reel Halogen-Free item