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SMD1812-350C-6V

BNstar · Resettable Fuses · 1812

SMD1812-350C-6V from BNstar, 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 First terminal of the non-polarized PTC; device holds 3.5 A and trips at 7.0 A at 25 °C, with Vmax 6.0 V and Imax 100 A.
2 2 passive Second terminal of the non-polarized PTC; device holds 3.5 A and trips at 7.0 A at 25 °C, with Vmax 6.0 V and Imax 100 A.

Key specifications

Parameter Value
Manufacturer BNstar
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) Rmin 0.008 Ω initial (un-soldered) state 1
Maximum resistance at 25℃ one hour after reflow R1max 0.035 Ω 25℃, one hour after reflow soldering of 260℃ for 20 sec 1
Trip current IT 7 A 25℃ still air, reflow 260℃ for 20 sec 1
Hold current IH 3.5 A 25℃ still air, reflow 260℃ for 20 sec 1
Maximum continuous voltage (rated voltage) Vmax 6 V at rated current 1
Maximum fault current Imax 100 A at rated voltage 1
Maximum time to trip Ttrip 4 s at assigned current 10.0 A, 25℃ 1
Typical power dissipation Pdtyp 2 W still air environment 1

CAD (KiCad official)

  • Symbol: SMD1812-350C-6V
  • 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: smd1812-350c-6v-etched.step / smd1812-350c-6v-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smd1812-350c-6v.step / smd1812-350c-6v.glb are the bare package body.

Provenance

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

  • Datasheet: BNstar datasheet (3 pp, sha256 19022ea273a17196, 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