component
04371.75WR
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
markdown04371.75WR
Littelfuse · Disposable Fuses · 1206
04371.75WR 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 end-cap terminal (Ag/Ni/Sn) of the 1206 fast-acting fuse; the element is non-polarized, rated 1.75A, 63V max, interrupting rating 50 A @ 63 V AC/DC. |
| 2 | 2 | passive | Other end-cap terminal (Ag/Ni/Sn) of the 1206 fast-acting fuse; the element is non-polarized and interchangeable with the other terminal, operating temperature -55°C to +150°C. |
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 (250mA-8A) | 4 | hours | 100% of ampere rating, 250mA - 8A, at 25ºC | 1 | |||
| Opening time at 250% of ampere rating (750mA-8A) | 5 | seconds | 250% of ampere rating, 750mA - 8A, at 25ºC | 1 | |||
| Opening time at 350% of ampere rating (750mA-8A) | 1 | seconds | 350% of ampere rating, 750mA - 8A, at 25ºC | 1 | |||
| Max. Voltage Rating | 63 | V | 1.75A (amp code 1.75) row | 1 | |||
| Interrupting Rating | 50 | A | 63 V AC/DC; AC tested at rated voltage with unity power factor; DC tested at rated voltage with time constant < 0.8 msec | 1 | |||
| Operating Temperature | -55 | 150 | ºC | 1 | |||
| Continuous operation current (re-rating) | 80 | % of rated current | continuous operation; recommended, in addition to standard 20% re-rating for continuous operation | 1 | |||
| Nominal Resistance | 0.071 | Ohms | measured with < 10% rated current | 1 | |||
| Nominal Melting I2t | 0.075 | A2Sec. | 1 | ||||
| Nominal Voltage Drop At Rated Current | 0.27 | V | at rated current, after temperature has stabilized | 1 | |||
| Nominal Power Dissipation At Rated Current | 0.473 | W | at rated current | 1 | |||
| Ampere Rating | 1.75 | A | amp code 1.75 (marking L) | 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:
04371.75WR - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
04371-75wr-etched.step/04371-75wr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);04371-75wr.step/04371-75wr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (3 pp, sha256
4118dc56d128f864, retrieved 2026-10-18, 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).