component
1812L075PR
Public Made by Adomby adom
Littelfuse Resettable Fuses, 1812. 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
markdown1812L075PR
Littelfuse · Resettable Fuses · 1812
1812L075PR from Littelfuse, in a 1812. 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 | Non-polarized solder-plated copper terminal of the 1812L075 PTC (0.75 A hold, 1.50 A trip, 13.2 Vdc max, 100 A max fault current); interchangeable with the other terminal. |
| 2 | 2 | passive | Non-polarized solder-plated copper terminal of the 1812L075 PTC (0.75 A hold, 1.50 A trip, 13.2 Vdc max, 100 A max fault current); interchangeable with the other terminal. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | 1812 |
| 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 |
|---|---|---|---|---|---|---|---|
| Hold current (I hold) | I hold | 0.75 | A | 20°C still air | 1 | ||
| Trip current (I trip) | I trip | 1.5 | A | 20°C still air | 1 | ||
| Maximum voltage (V max) | Vmax | 13.2 | Vdc | 1 | |||
| Maximum fault current (I max) | Imax | 100 | A | 1 | |||
| Power dissipated in tripped state (Pd) | Pd | 0.8 | W | tripped state at 20°C still air | 1 | ||
| Max. time to trip | 0.2 | s | at 8.00 A | 1 | |||
| Minimum resistance (R min) | R min | 0.1 | Ω | initial (un-soldered) state | 1 | ||
| Maximum resistance (R 1max) | R 1max | 0.45 | Ω | at 20°C, one hour after tripping or reflow soldering of 260°C for 20 sec | 1 | ||
| Operating/storage temperature | -40 | 85 | °C | Operating/Storage Temp. | 3 | ||
| Max. device surface temperature in tripped state | 125 | °C | in tripped state | 3 | |||
| Passive aging resistance change | -5 | 5 | % | +85°C, 1000 hours; typical resistance change | 3 | ||
| Humidity aging resistance change | -5 | 5 | % | +85°C, 85% R.H., 1000 hours; typical resistance change | 3 | ||
| Thermal shock resistance change | -30 | % | MIL-STD-202 Method 107, +85°C/-40°C 20 times; typical resistance change | 3 |
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 | Copper | Terminal Material Solder-Plated Copper (Solder Material: | 3 |
CAD (KiCad official)
- Symbol:
1812L075PR - Footprint:
Fuse:Fuse_1812_4532Metric - 3D model: 1812, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal 1806 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
1812l075pr-etched.step/1812l075pr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1812l075pr.step/1812l075pr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (7 pp, sha256
6208de21968a51c9, retrieved 2026-10-18, 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).