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SMD1812-050-15

Public Made by Adom

by adom

hongjiacheng Resettable Fuses, 1812. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SMD1812-050-15

hongjiacheng · Resettable Fuses · 1812

SMD1812-050-15 from hongjiacheng, 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 One of two interchangeable end terminals of the non-polarized PTC; Ihold 0.50 A, Itrip 1.0 A, Vmax 15 V, Imax 40 A.
2 2 passive Second interchangeable end terminal of the non-polarized PTC; recommended pad 1.7±0.1 mm wide by 3.5±0.1 mm tall, with 3.0±0.1 mm between pads.

Key specifications

Parameter Value
Manufacturer hongjiacheng
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 (maximum current without tripping) Ihold 0.5 A 25°C still air 2
Trip current (minimum current to trip) Itrip 1 A 25°C still air 2
Maximum voltage Vmax 15 V at rated current (Imax) 2
Maximum fault current Imax 40 A at rated voltage (Vmax) 2
Max. time-to-trip 8 Sec 2
Minimum resistance in initial state Ri 0.15 Ω initial (un-soldered) state 2
Maximum resistance at 25°C after trip or reflow R1 1.4 Ω 25°C, measured one hour after tripping or reflow soldering of 260°C for 20 sec 2
Operating / storage temperature -40 85 °C operating / storage temperature 5
Maximum device surface temperature in tripped state 125 °C tripped state 5
Typical power dissipated in tripped state Pd 0.8 W tripped state, 25°C still air 2

CAD (KiCad official)

  • Symbol: SMD1812-050-15
  • 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: smd1812-050-15-etched.step / smd1812-050-15-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smd1812-050-15.step / smd1812-050-15.glb are the bare package body.

Provenance

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

  • Datasheet: hongjiacheng datasheet (6 pp, sha256 8ab1f213bc6d6cd2, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF