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FMMT634

Public Made by Adom

by adom

YFW Darlington Transistors, SOT-23-3L. 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
Name Last commit message Last updated
docs fmmt634: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers fmmt634: viewers · Ray 1mo ago
fmmt634-etched.fit.json fmmt634: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
fmmt634-etched.glb fmmt634: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
fmmt634-etched.step fmmt634: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
fmmt634.glb Publish 0.1.0 · Ray 1mo ago
fmmt634.kicad_mod Publish 0.1.0 · Ray 1mo ago
fmmt634.kicad_sym Publish 0.1.0 · Ray 1mo ago
fmmt634.lbr Publish 0.1.0 · Ray 1mo ago
fmmt634.step Publish 0.1.0 · Ray 1mo ago
package.json fmmt634: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json fmmt634: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
README.md Initial commit: component/fmmt634 · Ray 1mo ago

FMMT634

YFW · Darlington Transistors · SOT-23-3L

FMMT634 from YFW, in a SOT-23-3L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 B input Base input of NPN Darlington pair; VBE(on) = 1.50 V typ at VCE = 5 V, IC = 1 A; drives collector current up to 900 mA continuous (ICM 5 A peak).
2 E passive Emitter; BVEBO = 12 V; emitter cut-off current IEBO ≤ 10 nA at VEB = 7 V.
3 C output Collector; BVCEO = 100 V, BVCBO = 120 V; IC max 900 mA continuous, ICM 5 A peak; VCE(sat) ≤ 0.96 V at IC = 900 mA, IB = 5 mA.

Key specifications

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

CAD (KiCad official)

  • Symbol: FMMT634
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: fmmt634-etched.step / fmmt634-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fmmt634.step / fmmt634.glb are the bare package body.

Provenance

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

  • Datasheet: YFW datasheet (4 pp, sha256 24a0159b2d5e6073, retrieved 2026-09-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-sonnet-4-6 (text+vision), consensus claude-opus-4-7 (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