component

MF-USML500

Public Made by Adom

by adom

BOURNS Resettable Fuses, 1210. 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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MF-USML500

BOURNS · Resettable Fuses · 1210

MF-USML500 from BOURNS, in a 1210. 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 BOURNS
Package 1210
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
Resistance R 0.001 0.012 Ω In still air at 23 °C (Rmin / R1max) 1
Maximum time to trip 2 s At 25 A 1
Maximum interrupt current Imax 50 A 1
Resistance change after passive aging ΔR/R -10 10 % +85 °C, 1000 hours (typical) 1
Resistance change after humidity aging ΔR/R -15 15 % +85 °C, 85 % R.H., 100 hours (typical) 1
Resistance change after thermal shock ΔR/R -30 30 % -40 °C to +85 °C, 20 times (typical) 1
Hold current Ihold 5 A at 23 °C 1
Trip current Itrip 10 A at 23 °C 1
Tripped power dissipation 1.2 W at 23 °C 1
Operating temperature TA -40 85 °C 1
Storage temperature before opening 40 °C Before opening, 70 % RH max 1

CAD (KiCad official)

  • Symbol: MF-USML500
  • Footprint: Fuse:Fuse_1210_3225Metric
  • 3D model: 1210 (KiCad packages3D, STEP)
  • 3D model files: mf-usml500-etched.step / mf-usml500-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mf-usml500.step / mf-usml500.glb are the bare package body.

Provenance

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

  • Datasheet: BOURNS datasheet (7 pp, sha256 86b60882e1aa972e, retrieved 2026-10-18, 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