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FMMT491

Public Made by Adom

by adom

Changjing Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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fmmt491-etched.step fmmt491: factory component page (tier=lcsc) · Ray 28d ago
fmmt491-hero.glb fmmt491: hero GLB from the etched model (keeps the MPN mark) · Ray 28d ago
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FMMT491

Changjing · Bipolar (BJT) · SOT-23

FMMT491 from Changjing, in a SOT-23. 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 BASE input Base terminal of the NPN transistor, with emitter-base voltage limited to VEBO 5 V and continuous collector current limited to IC 1 A.
2 EMITTER passive Emitter terminal of the NPN transistor, with emitter-base breakdown V(BR)EBO of 5 V at IE=100μA and emitter cut-off current IEBO of 0.1 μA at VEB=4 V.
3 COLLECTOR passive Collector terminal of the NPN transistor, rated for VCBO 80 V, VCEO 60 V, continuous IC 1 A, peak pulse current ICM 2 A and power dissipation PC 250 mW.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-23
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: FMMT491
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: fmmt491-etched.step / fmmt491-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fmmt491.step / fmmt491.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (2 pp, sha256 407b8d50e57e4aed, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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