component
0501012.WR1
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
markdown0501012.WR1
Littelfuse · Disposable Fuses · 1206
0501012.WR1 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 | Fuse terminal 1 (non-polarized, two-terminal 1206 ceramic fuse, 20A max rating series 10A-20A at 32 V max, 150 A DC interrupting rating). |
| 2 | 2 | passive | Fuse terminal 2 (non-polarized, two-terminal 1206 ceramic fuse, terminations Ag/Ni/Sn), interchangeable with terminal 1. |
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 (10A-20A range) | 4 | Hours | 100% of ampere rating, 10A-20A, opening time at 25ºC | 1 | |||
| Opening time at 350% of ampere rating (10A-20A range) | 5 | Seconds | 350% of ampere rating, 10A-20A, opening time at 25ºC | 1 | |||
| Operating temperature | -55 | 150 | ºC | Operating Temperature | 1 | ||
| Max. voltage rating (12A, Amp Code 012.) | 32 | V | 1 | ||||
| Interrupting rating (DC) | 150 | A | @ 32 VDC, DC interrupting rating tested at rated voltage with time constant < 0.5 msec | 1 | |||
| Continuous operation current re-rating | 80 | % of rated current | Devices operated continuously; recommended no more than 80% rated current | 1 | |||
| Peak temperature (TP), reflow | 260 | °C | Pb-free reflow; printed as 260+0/-5 °C; 'Do not exceed 260°C' | 2 | |||
| Wave soldering temperature | 260 | °C | Wave soldering, 10 seconds max. | 2 | |||
| Wave soldering time | 10 | seconds | Wave soldering at 260°C | 2 | |||
| Preheat temperature Ts(min) | Ts(min) | 150 | °C | Pb-free reflow pre heat | 2 | ||
| Preheat temperature Ts(max) | Ts(max) | 200 | °C | Pb-free reflow pre heat | 2 | ||
| Preheat time (Ts min to max) | ts | 60 | 180 | seconds | Time (Min to Max), Pb-free reflow pre heat | 2 | |
| Time above liquidus (tL) | tL | 60 | 150 | seconds | Reflow, Pb-free | 2 | |
| Time within 5°C of peak temperature | tp | 10 | 30 | seconds | Time within 5°C of actual peak temperature, Pb-free reflow | 2 | |
| Average ramp-up rate (TL to peak) | 3 | °C/second | Liquidus Temp (TL) to peak, max. | 2 | |||
| Ramp-up rate TS(max) to TL | 5 | °C/second | TS(max) to TL, max. | 2 | |||
| Ramp-down rate | 6 | °C/second | Pb-free reflow, max. | 2 | |||
| Time 25°C to peak temperature (TP) | 8 | minutes | Time 25°C to peak Temperature (TP), max. | 2 | |||
| Nominal resistance (12A) | 0.00311 | Ohms | Nominal Resistance measured with < 10% rated current | 1 | |||
| Nominal melting I2T (12A) | 20.341 | A2Sec. | Nominal Melting I2t measured at 1 msec. opening time | 1 | |||
| Nominal voltage drop at rated current (12A) | 0.04927 | V | Measured at rated current after temperature stabilized, fuse mounted on board with 3-oz Cu trace | 1 | |||
| Nominal power dissipation at rated current (12A) | 0.5912 | W | At rated current | 1 | |||
| Ampere rating (this part) | 12 | A | Amp Code 012. | 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: Lead-free Glass | 3 |
CAD (KiCad official)
- Symbol:
0501012.WR1 - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
0501012-wr1-etched.step/0501012-wr1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);0501012-wr1.step/0501012-wr1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (3 pp, sha256
15c363790431c053, retrieved 2026-10-19, 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).