component
0437002.WR
Public Made by Adomby adom
Littelfuse Disposable Fuses, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdown0437002.WR
Littelfuse · Disposable Fuses · 1206
0437002.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 Ag/Ni/Sn end termination of the 2 A (amp code 002.) fast-acting fuse, rated 63 V with 0.058 ohm nominal resistance and 50 A @ 63 V AC/DC interrupting rating. |
| 2 | 2 | passive | Other Ag/Ni/Sn end termination of the 2 A (amp code 002.) fast-acting fuse, rated 63 V with 0.058 ohm nominal resistance and 50 A @ 63 V AC/DC interrupting rating. |
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 ampere rating | 4 | hours | 100% of ampere rating, 250mA-8A, at 25ºC | 1 | |||
| Opening time at 250% of ampere rating | 5 | seconds | 250% of ampere rating, 750mA-8A, at 25ºC | 1 | |||
| Opening time at 350% of ampere rating | 1 | second | 350% of ampere rating, 750mA-8A, at 25ºC | 1 | |||
| Max. voltage rating | 63 | V | 1 | ||||
| Interrupting rating | 50 | A | tested at rated voltage 63 V AC/DC | 1 | |||
| Operating temperature | -55 | 150 | ºC | 1 | |||
| Continuous operation current | 80 | % of rated current | devices operated continuously | 1 | |||
| Peak reflow temperature | TP | 260 | °C | Pb-free reflow; do not exceed 260°C | 2 | ||
| Nominal resistance | 0.058 | Ohms | measured with < 10% rated current | 1 | |||
| Nominal melting I2t | 0.197 | A2Sec. | 1 | ||||
| Nominal voltage drop at rated current | 0.2 | V | measured at rated current after temperature has stabilized | 1 | |||
| Nominal power dissipation at rated current | 0.4 | W | at 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:
0437002.WR - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
0437002-wr-etched.step/0437002-wr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);0437002-wr.step/0437002-wr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (3 pp, sha256
c2236d59abc0fa90, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).