component

C945

Public Made by Adom

by adom

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

componenttransistors-thyristorsc945factory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 17d ago
viewers c945: viewers · Ray 17d ago
c945-etched.glb Publish 0.1.0 · Ray 17d ago
c945-etched.step c945: factory component page (tier=lcsc) · Ray 17d ago
c945-hero.glb c945: hero GLB from the etched model (keeps the MPN mark) · Ray 17d ago
c945-hero.overlay.json Publish 0.1.0 · Ray 17d ago
c945.glb Publish 0.1.0 · Ray 17d ago
c945.kicad_mod Publish 0.1.0 · Ray 17d ago
c945.kicad_sym Publish 0.1.0 · Ray 17d ago
c945.lbr Publish 0.1.0 · Ray 17d ago
c945.step Publish 0.1.0 · Ray 17d ago
package.json Publish 0.1.0 · Ray 17d ago
page.json Set visibility: public · Ray 17d ago
README.md Publish 0.1.0 · Ray 17d ago

C945

Changjing · Bipolar (BJT) · SOT-23

C945 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; the datasheet specifies VBE(sat) of 1 V at IC=100 mA with IB=10 mA and an emitter-base breakdown of 5 V minimum (VEBO 5 V maximum rating).
2 EMITTER passive Emitter terminal of the NPN transistor; the emitter-base voltage rating VEBO is 5 V and the absolute maximum IC is 150 mA continuous.
3 COLLECTOR passive Collector terminal of the NPN transistor; ratings are VCBO 60 V, VCEO 50 V, continuous IC 150 mA, and collector power dissipation PC 200 mW.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-base breakdown voltage V(BR)CBO 60 V IC=100uA, IE=0 1
Collector-emitter breakdown voltage V(BR)CEO 50 V IC=1mA, IB=0 1
Emitter-base breakdown voltage V(BR)EBO 5 V IE=0.1mA, IC=0 1
Collector cut-off current ICBO 0.1 uA VCB=60V, IE=0 1
Emitter cut-off current IEBO 0.1 uA VEB=5V, IC=0 1
DC current gain hFE(1) 130 400 VCE=6V, IC=1mA 1
DC current gain hFE(2) 40 VCE=6V, IC=0.1mA 1
Collector-emitter saturation voltage VCE(sat) 0.3 V IC=100mA, IB=10mA 1
Base-emitter saturation voltage VBE(sat) 1 V IC=100mA, IB=10mA 1
Transition frequency fT 150 MHz VCE=6V, IC=10mA, f=30 MHz 1
Collector output capacitance Cob 3 pF VCB=10V, IE=0, f=1MHZ 1
Noise figure NF 4 10 dB VCE=6V, IC=0.1mA, Rg=10kΩ, f=1kMHZ 1
Collector-base voltage VCBO 60 V 1
Collector-emitter voltage VCEO 50 V 1
Emitter-base voltage VEBO 5 V 1
Collector current, continuous IC 150 mA 1
Collector power dissipation PC 200 mW 1
Junction temperature TJ 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: C945
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: c945-etched.step / c945-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); c945.step / c945.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (2 pp, sha256 8d46f71c7d0d0124, retrieved 2026-10-17, 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