component
0438002.WR
Public Made by Adomby adom
Littelfuse Disposable Fuses, 0603. 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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README
markdown0438002.WR
Littelfuse · Disposable Fuses · 0603
0438002.WR from Littelfuse, in a 0603. 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 | Fuse terminal 1 (Ag/Ni/Sn termination); non-polarized, 2 A rated, 32 V max, 50 A interrupting rating at 32VDC/12VAC. |
| 2 | 2 | passive | Fuse terminal 2 (Ag/Ni/Sn termination); non-polarized and interchangeable with terminal 1, in series with the protected circuit. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | 0603 |
| 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; opening time at 25ºC | 1 | |||
| Opening time at 250% of ampere rating | 5 | s | 250% of ampere rating; opening time at 25ºC | 1 | |||
| Operating temperature | -55 | 150 | ºC | 1 | |||
| Continuous operating current | 80 | % | Recommended continuous operation, percent of rated current | 1 | |||
| Max. voltage rating | 32 | VDC | Amp code 002. | 1 | |||
| Interrupting rating | 50 | A | @ 32VDC/12VAC | 1 | |||
| Peak temperature (Pb-free reflow) | TP | 260 | °C | Printed as 260+0/-5 °C; Pb-free reflow assembly | 2 | ||
| Time within 5°C of peak temperature | tp | 10 | 30 | s | Pb-free reflow assembly | 2 | |
| Time 25°C to peak temperature | 8 | min | Pb-free reflow assembly | 2 | |||
| Average ramp-up rate (TL to peak) | 3 | °C/second | Pb-free reflow assembly | 2 | |||
| Ramp-down rate | 6 | °C/second | Pb-free reflow assembly | 2 | |||
| Wave soldering time | 10 | s | Wave soldering at 260°C | 2 | |||
| Rated current (ampere rating) | 2 | A | Amp code 002. | 1 | |||
| Nominal resistance | 0.051 | Ohms | Measured with <10% rated current; amp code 002. | 1 | |||
| Nominal melting I2t | I2t | 0.149 | A2Sec. | Measured at 1 msec. opening time; amp code 002. | 1 | ||
| Nominal voltage drop at rated current | 0.107 | V | Measured at rated current after temperature has stabilized; amp code 002. | 1 | |||
| Nominal power dissipation at rated current | 0.214 | W | At rated current; amp code 002. | 1 |
CAD (KiCad official)
- Symbol:
0438002.WR - Footprint:
Fuse:Fuse_0603_1608Metric - 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files:
0438002-wr-etched.step/0438002-wr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);0438002-wr.step/0438002-wr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (3 pp, sha256
052a726ae5f412a4, retrieved 2026-10-15, 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).