component

0437004.WR

Public Made by Adom

by adom

Littelfuse Disposable Fuses, 1206. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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0437004-wr-etched.step 0437004-wr: factory component page (tier=lcsc) · Ray 1d ago
0437004-wr-hero.glb 0437004-wr: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
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0437004.WR

Littelfuse · Disposable Fuses · 1206

0437004.WR from Littelfuse, in a 1206. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1 passive Terminal 1 of an unpolarised fuse; either orientation.
2 2 passive Terminal 2 of an unpolarised fuse; either orientation.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package 1206
Category Circuit Protection
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Max. Voltage Rating 63 V 1
Ampere Rating 4 A 1
Nominal Resistance 0.022 Ohms Measured with <10% rated current 1
Nominal Melting I2t 1.024 A2 Sec. 1
Nominal Voltage Drop At Rated Current 0.13 V Measured at rated current after temperature has stabilized 1
Nominal Power Dissipation At Rated Current 0.52 W At rated current 1
Opening Time at 25ºC (100% of ampere rating) 4 hours 100% of ampere rating, 750mA-8A range is 250% row; this row applies to 250mA-8A, at 25ºC 1
Opening Time at 25ºC (250% of ampere rating) 5 seconds 250% of ampere rating, 750mA-8A, at 25ºC 1
Opening Time at 25ºC (350% of ampere rating) 1 seconds 350% of ampere rating, 750mA-8A, at 25ºC 1
Operating Temperature -55 150 ºC 1
Continuous Operating Current (recommended) 80 % Continuous operation, percent of rated current 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin Terminations: Ag / Ni / Sn (100% Lead-free) Element Cover Coating: Ceramic/Lead-free 3

CAD (KiCad official)

  • Symbol: 0437004.WR
  • Footprint: Fuse:Fuse_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: 0437004-wr-etched.step / 0437004-wr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 0437004-wr.step / 0437004-wr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Littelfuse datasheet (3 pp, sha256 cc8a5347bf86eeaf, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF