component
043801.5WR
Public Made by Adomby adom
Littelfuse Disposable Fuses, 0603. 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
markdown043801.5WR
Littelfuse · Disposable Fuses · 0603
043801.5WR 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 | 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 | 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, 25ºC | 4 | hours | 100% of ampere rating; opening time at 25ºC | 1 | |||
| Opening time at 250% of ampere rating, 25ºC | 5 | seconds | 250% of ampere rating; opening time at 25ºC | 1 | |||
| Max. Voltage Rating | 63 | VDC | Amp code 01.5 (1.5 A) row | 1 | |||
| Interrupting rating (DC) | 50 | A | @ 63VDC | 1 | |||
| Interrupting rating (AC) | 50 | A | @ 32VAC | 1 | |||
| Nominal Resistance | 0.174 | Ohms | Measured with < 10% rated current | 1 | |||
| Nominal Melting I2t | 0.0902 | A2Sec. | Measured at 1 msec. opening time | 1 | |||
| Nominal Voltage Drop At Rated Current | 0.368 | V | At rated current after temperature has stabilized | 1 | |||
| Nominal Power Dissipation At Rated Current | 0.552 | W | At rated current | 1 | |||
| Operating Temperature | -55 | 150 | ºC | 1 | |||
| Continuous operation current | 80 | % of rated current | Continuous operation; no more than 80% rated current | 1 | |||
| Pre-heat temperature Ts(min) | Ts(min) | 150 | °C | Pb-free reflow pre-heat | 2 | ||
| Pre-heat temperature Ts(max) | Ts(max) | 200 | °C | Pb-free reflow pre-heat | 2 | ||
| Pre-heat time (Min to Max) | ts | 60 | 180 | seconds | Pb-free reflow pre-heat | 2 | |
| Average ramp-up rate (TL to peak) | 3 | °C/second | Liquidus (TL) to peak | 2 | |||
| TS(max) to TL ramp-up rate | 5 | °C/second | TS(max) to TL | 2 | |||
| Time above liquidus (tL) | tL | 60 | 150 | seconds | Reflow, Pb-free | 2 | |
| Peak temperature (TP) | TP | 260 | °C | Pb-free reflow; printed as 260+0/-5 °C | 2 | ||
| Time within 5°C of actual peak temperature (tp) | tp | 10 | 30 | seconds | Within 5°C of actual peak | 2 | |
| Ramp-down rate | 6 | °C/second | Reflow, Pb-free | 2 | |||
| Time 25°C to peak temperature (TP) | 8 | minutes | 25°C to peak temperature | 2 | |||
| Maximum soldering temperature | 260 | °C | Do not exceed | 2 | |||
| Wave soldering temperature | 260 | °C | Wave soldering | 2 | |||
| Wave soldering time | 10 | seconds | Wave soldering | 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% Lead-free) Element Cover Coating: Lead-free Glass | 3 |
CAD (KiCad official)
- Symbol:
043801.5WR - Footprint:
Fuse:Fuse_0603_1608Metric - 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files:
043801-5wr-etched.step/043801-5wr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);043801-5wr.step/043801-5wr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (3 pp, sha256
052a726ae5f412a4, retrieved 2026-10-20, 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).