component

mSMD350

Public Made by Adom

by adom

TECHFUSE 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
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 25d ago
viewers msmd350: viewers · Ray 25d ago
msmd350-etched.glb msmd350: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
msmd350-etched.step msmd350: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
msmd350-hero.glb msmd350: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
msmd350-hero.overlay.json msmd350: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
msmd350.glb plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 23d ago
msmd350.kicad_mod Publish 0.1.0 · Ray 25d ago
msmd350.kicad_sym msmd350: KiCad Device:Fuse symbol instead of a box (two-terminal passive) · Ray 11d ago
msmd350.lbr msmd350: KiCad Device:Fuse symbol instead of a box (two-terminal passive) · Ray 11d ago
msmd350.step plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 23d ago
package.json msmd350: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
page.json msmd350: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
README.md Publish 0.1.0 · Ray 25d ago

mSMD350

TECHFUSE · Resettable Fuses · 1812

mSMD350 from TECHFUSE, 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 TECHFUSE
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 (Ihold), typical Ihold 3.5 A 25°C still air, maximum current device will not trip 1
Trip current (Itrip), minimum Itrip 6 A 25°C still air, minimum current at which device will always trip 1
Minimum resistance prior to tripping (Rimin) Rimin 0.008 Ω 25°C, prior to tripping 1
Maximum resistance one hour post reflow (R1max) R1max 0.03 Ω measured one hour post reflow 1
Maximum operating voltage (Vmax) Vmax 6 Vdc @25°C, without damage at rated current (Imax) 1
Maximum fault current (Imax) Imax 100 A @25°C, without damage at rated voltage (Vmax) 1
Power dissipation in tripped state (Pd) Pd 2 W tripped state, 25°C still air, at rated voltage 1
Time to trip (Time column) 4 s 1
Resistance change, passive aging -5 5 % +85°C, 1000 hrs; typical 1
Resistance change, humidity aging -5 5 % +85°C, 85% R.H., 168 hours; typical 1
Resistance change, thermal shock -33 33 % +85°C to -40°C, 20 times; typical 1
Ambient operating temperature range -40 85 °C ambient operating conditions 1
Maximum surface temperature in tripped state 125 °C device in tripped state 1
Hold current vs ambient temperature Ihold 4.84 A Tmao = -40°C 1
Hold current vs ambient temperature Ihold 4.39 A Tmao = -20°C 1
Hold current vs ambient temperature Ihold 4.04 A Tmao = 0°C 1
Hold current vs ambient temperature Ihold 3.5 A Tmao = 25°C 1
Hold current vs ambient temperature Ihold 2.98 A Tmao = 40°C 1
Hold current vs ambient temperature Ihold 2.66 A Tmao = 50°C 1
Hold current vs ambient temperature Ihold 2.35 A Tmao = 60°C 1
Hold current vs ambient temperature Ihold 1.88 A Tmao = 70°C 1
Hold current vs ambient temperature Ihold 1.55 A Tmao = 85°C 1
Storage temperature maximum 40 °C storage, 70% R.H. max 3

CAD (KiCad official)

  • Symbol: mSMD350
  • 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: msmd350-etched.step / msmd350-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); msmd350.step / msmd350.glb are the bare package body.

Provenance

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

  • Datasheet: TECHFUSE datasheet (3 pp, sha256 67b891cab3436150, retrieved 2026-10-15, tier: lcsc)
  • 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