component

1812L020PR

Public Made by Adom

by adom

Littelfuse Resettable Fuses, 1812. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
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docs Publish 0.2.1 · Ray 11d ago
viewers 1812l020pr: viewers · Ray 1mo ago
1812l020pr-etched.fit.json 1812l020pr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
1812l020pr-etched.glb Publish 0.2.1 · Ray 11d ago
1812l020pr-etched.step 1812l020pr: factory component page (tier=mfr) · Ray 11d ago
1812l020pr-hero.glb 1812l020pr: hero GLB from the etched model (keeps the MPN mark) · Ray 11d ago
1812l020pr-hero.overlay.json Publish 0.2.1 · Ray 11d ago
1812l020pr.glb Publish 0.2.1 · Ray 11d ago
1812l020pr.kicad_mod Publish 0.2.0 · Ray 1mo ago
1812l020pr.kicad_sym 1812l020pr: KiCad Device:Fuse symbol instead of a box (two-terminal passive) · Ray 11d ago
1812l020pr.lbr 1812l020pr: KiCad Device:Fuse symbol instead of a box (two-terminal passive) · Ray 11d ago
1812l020pr.step Publish 0.2.1 · Ray 11d ago
package.json Publish 0.2.1 · Ray 11d ago
page.json Set visibility: public · Ray 11d ago
README.md Publish 0.2.1 · Ray 11d ago

1812L020PR

Littelfuse · Resettable Fuses · 1812

1812L020PR 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 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 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
Minimum resistance (initial, un-soldered) R min 0.8 Ω initial (un-soldered) state 2
Maximum resistance after trip or reflow R 1max 5 Ω 20°C, measured one hour after tripping or reflow soldering of 260°C for 20 sec 2
Trip current I trip 0.4 A 20°C still air 2
Maximum voltage V max 30 Vdc at rated current (I max) 2
Maximum fault current I max 100 A at rated voltage (Vmax) 2
Maximum time to trip 0.02 Sec. at 8.00 A 2
Passive aging resistance change -5 5 % +85°C, 1000 hours; typical resistance change 4
Humidity aging resistance change -5 5 % +85°C, 85% R.H., 1000 hours; typical resistance change 4
Operating temperature -40 85 °C Operating Temp. 4
Maximum device surface temperature in tripped state 125 °C tripped state 4
Peak classification temperature (reflow) TP 260 °C Pb-free reflow profile; printed as 260+0/-5 °C 4
Hold current I hold 0.2 A 20°C still air 2
Power dissipated in tripped state P d 0.8 W tripped state at 20°C still air 2
Resistance change after thermal shock -30 % MIL-STD-202 Method 107, +85°C/-40°C 20 times; typical resistance change 4
Hold current vs ambient temperature I hold 0.29 A ambient -40°C 3
Hold current vs ambient temperature I hold 0.26 A ambient -20°C 3
Hold current vs ambient temperature I hold 0.23 A ambient 0°C 3
Hold current vs ambient temperature I hold 0.2 A ambient 20°C 3
Hold current vs ambient temperature I hold 0.17 A ambient 40°C 3
Hold current vs ambient temperature I hold 0.15 A ambient 50°C 3
Hold current vs ambient temperature I hold 0.14 A ambient 60°C 3
Hold current vs ambient temperature I hold 0.12 A ambient 70°C 3
Hold current vs ambient temperature I hold 0.1 A ambient 85°C 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: 4

CAD (KiCad official)

  • Symbol: 1812L020PR
  • Footprint: Fuse:Fuse_1812_4532Metric
  • 3D model: 1812 (KiCad packages3D, STEP)
  • 3D model files: 1812l020pr-etched.step / 1812l020pr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1812l020pr.step / 1812l020pr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Littelfuse datasheet (8 pp, sha256 410cca68bb84b17c, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (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).

Datasheet PDF