component
0437.375WR
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
markdown0437.375WR
Littelfuse · Disposable Fuses · 1206
0437.375WR 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 |
|---|---|---|---|---|---|---|---|
| Max. Voltage Rating | 125 | V | 1 | ||||
| Interrupting Rating | 50 | A | @ 125 V AC/DC | 1 | |||
| Opening time at 100% of ampere rating | 4 | hours | 250mA - 8A, at 25ºC; minimum | 1 | |||
| Opening time at 350% of ampere rating | 5 | seconds | 250mA - 500mA, at 25ºC; maximum | 1 | |||
| Operating Temperature | -55 | 150 | ºC | Series operating temperature range | 1 | ||
| Continuous operation current (re-rating) | 80 | % | Devices operated continuously; percent of rated current | 1 | |||
| Peak soldering temperature (Pb-free reflow) | 260 | °C | Do not exceed 260°C (Pb-free reflow) | 2 | |||
| Wave soldering temperature | 260 | °C | Wave soldering, 10 seconds max | 2 | |||
| Nominal Resistance | 1.33 | Ohms | Measured with < 10% rated current | 1 | |||
| Nominal Melting I2t | I2t | 0.01 | A2Sec. | 1 | |||
| Nominal Voltage Drop At Rated Current | 0.6 | V | Measured at rated current after temperature has stabilized | 1 | |||
| Nominal Power Dissipation At Rated Current | 0.225 | 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:
0437.375WR - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
0437-375wr-etched.step/0437-375wr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);0437-375wr.step/0437-375wr.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, 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).