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mSMD035

Public Made by Adom

by adom

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

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mSMD035

TECHFUSE · Resettable Fuses · 1812

mSMD035 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 One terminal pad of the non-polarized PPTC (tin-plated nickel-copper), rated 30 Vdc max, 0.35 A hold and 0.70 A trip current at 25°C, 100 A max fault current.
2 2 passive Second terminal pad of the non-polarized PPTC (tin-plated nickel-copper), rated 30 Vdc max, 0.35 A hold and 0.70 A trip current at 25°C, 100 A max fault current.

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
Rated voltage (Vmax) Vmax 30 Vdc Maximum operating voltage at rated current (Imax) 2
Maximum fault current (Imax) Imax 100 A At rated voltage (Vmax) 2
Trip current (Itrip) Itrip 0.7 A 25°C still air; minimum current at which device always trips 2
Minimum resistance prior to tripping (Rimin) Rimin 0.1 Ω 25°C 2
Maximum resistance one hour post reflow (R1max) R1max 0.23 Ω 25°C, measured one hour post reflow 2
Power dissipation in tripped state (Pd) Pd 0.8 W Tripped state, 25°C still air, at rated voltage 2
Time to trip 8 Sec Typical time-to-trip at 25°C; test current not printed 2
Hold current (Ihold) nominal Ihold 0.35 A 25°C still air; maximum current device will not trip 2
Ambient operating temperature Tamb -40 85 °C Ambient operating conditions 2
Maximum surface temperature in tripped state 125 °C Device in tripped state 2
Maximum ambient operating temperature vs hold current: Ihold at -40°C Ihold 0.51 A Ambient -40°C 2
Maximum ambient operating temperature vs hold current: Ihold at -20°C Ihold 0.45 A Ambient -20°C 2
Maximum ambient operating temperature vs hold current: Ihold at 0°C Ihold 0.4 A Ambient 0°C 2
Maximum ambient operating temperature vs hold current: Ihold at 25°C Ihold 0.35 A Ambient 25°C 2
Maximum ambient operating temperature vs hold current: Ihold at 40°C Ihold 0.3 A Ambient 40°C 2
Maximum ambient operating temperature vs hold current: Ihold at 50°C Ihold 0.26 A Ambient 50°C 2
Maximum ambient operating temperature vs hold current: Ihold at 60°C Ihold 0.24 A Ambient 60°C 2
Maximum ambient operating temperature vs hold current: Ihold at 70°C Ihold 0.21 A Ambient 70°C 2
Maximum ambient operating temperature vs hold current: Ihold at 85°C Ihold 0.17 A Ambient 85°C 2
Storage temperature 40 °C Storage conditions, maximum 4
Storage relative humidity 70 %R.H. Storage conditions, maximum 4

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 tin Termination Pad Characteristics Terminal pad materials： Tin-plated Nickel-Copper Terminal pad solderability： Meets EIA specification RS186-9E and ANSI/J-STD-002 Category 3. Rework 3

CAD (KiCad official)

  • Symbol: mSMD035
  • 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: msmd035-etched.step / msmd035-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); msmd035.step / msmd035.glb are the bare package body.

Provenance

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

  • Datasheet: TECHFUSE datasheet (4 pp, sha256 0a6daece1b218f5c, retrieved 2026-10-18, 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