component
0407004.WR
Public Made by Adomby 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.
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
markdown0407004.WR
Littelfuse · Disposable Fuses · 1206
0407004.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 |
|---|---|---|---|---|---|---|---|
| Opening time at 100% of ampere rating (4 A part) | 4 | hours | 100% of ampere rating, at 25ºC; 1A-8A series | 1 | |||
| Opening time at 200% of ampere rating (4 A part) | 1 | 120 | sec | 200% of ampere rating, at 25ºC; 1A-8A series (max is 120 secs) | 1 | ||
| Opening time at 300% of ampere rating (4 A part) | 0.1 | 3 | sec | 300% of ampere rating, at 25ºC; 1A-8A series (max is 3 secs) | 1 | ||
| Opening time at 800% of ampere rating (4 A part) | 0.002 | 0.05 | sec | 800% of ampere rating, at 25ºC; 1A-8A series (max is 0.05 secs) | 1 | ||
| Operating temperature | -55 | 150 | ºC | 1 | |||
| Interrupting rating (AC/DC) for 4.00 A, 004. (32 V group) | 50 | A | 50A@32VDC; AC tested at rated voltage with unity power factor; DC tested at rated voltage with time constant < 0.8 msec | 2 | |||
| Max. voltage rating (4.00 A, 004.) | 32 | V | 2 | ||||
| Nominal resistance (4.00 A, 004.) | 0.025 | Ohms | measured with < 10% rated current | 2 | |||
| Nominal power dissipation at rated current (4.00 A, 004.) | 0.56 | W | at rated current | 2 |
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% Leadfree) Element Cover Coating: Lead-free Glass | 3 |
CAD (KiCad official)
- Symbol:
0407004.WR - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
0407004-wr-etched.step/0407004-wr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);0407004-wr.step/0407004-wr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (4 pp, sha256
880b3d6222280844, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal convention(convention), consensusoff(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).