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FMMT618

Changjing · Bipolar (BJT) · SOT-23

FMMT618 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; base current is rated up to 0.5 A (IB) and emitter-base voltage up to 5 V (VEBO).
2 EMITTER passive Emitter terminal; emitter-base voltage is limited to 5 V (VEBO) and the device is rated for an operating junction and storage range of -55 to +150 ℃.
3 COLLECTOR passive Collector terminal; continuous collector current is rated up to 2.5 A (IC) with collector-emitter voltage up to 20 V (VCEO).

Key specifications

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

CAD (KiCad official)

  • Symbol: FMMT618
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: fmmt618-etched.step / fmmt618-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fmmt618.step / fmmt618.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (5 pp, sha256 545b7d2e42682366, 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