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MMST2222A

Public Made by Adom

by adom

Changjing Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MMST2222A

Changjing · Bipolar (BJT) · SOT-323

MMST2222A from Changjing, in a SOT-323. 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; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCBO 75 V, VEBO 6 V, IC 600 mA continuous, PC 200 mW).
2 EMITTER passive Emitter terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCEO 40 V, IC 600 mA continuous).
3 COLLECTOR passive Collector terminal of the NPN transistor; the datasheet gives no separate pin-level limit, only the device maximum ratings (VCBO 75 V, VCEO 40 V, IC 600 mA continuous, PC 200 mW).

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-323
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: MMST2222A
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: mmst2222a-etched.step / mmst2222a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmst2222a.step / mmst2222a.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 65e8da25071cbe64, 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