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0437008.WR

Littelfuse · Disposable Fuses · 1206

0437008.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 One fuse terminal (Ag/Ni/Sn end termination, 0.520 ±0.200 mm long); the fuse is non-polarized, rated 8 A, 32 V, and the two terminals are interchangeable.
2 2 passive Other fuse terminal (Ag/Ni/Sn end termination, 0.520 ±0.200 mm long); the fuse is non-polarized, rated 8 A, 32 V, and the two terminals are interchangeable.

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
Opening time at 100% of rated current 4 hours 250mA-8A, at 25ºC 1
Opening time at 250% of rated current 5 seconds 750mA-8A, at 25ºC 1
Opening time at 350% of rated current 1 second 750mA-8A, at 25ºC 1
Maximum voltage rating 32 V 1
Interrupting rating 50 A @ 32 V AC/35 V DC 1
Nominal resistance 0.008 Ohms Measured with <10% rated current 1
Nominal melting I2t 7.23 A2Sec. 1
Nominal voltage drop at rated current 0.13 V At rated current, after temperature has stabilized 1
Nominal power dissipation at rated current 1.04 W At rated current 1
Operating temperature -55 150 ºC 1
Continuous operating current 80 % of rated current Continuous operation 1
Peak reflow temperature (TP) TP 260 °C Pb-free reflow; printed as 260 +0/-5 °C 2
Wave soldering temperature 260 °C Wave soldering 2
Wave soldering time 10 seconds Wave soldering 2
Time 25°C to peak temperature 8 minutes Pb-free reflow 2

CAD (KiCad official)

  • Symbol: 0437008.WR
  • Footprint: Fuse:Fuse_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: 0437008-wr-etched.step / 0437008-wr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 0437008-wr.step / 0437008-wr.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (3 pp, sha256 a7789cf92a0beba5, retrieved 2026-10-13, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (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