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2SC4373

Public Made by Adom

by adom

Changjing Bipolar (BJT), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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2sc4373-hero.glb 2sc4373: hero GLB from the etched model (keeps the MPN mark) · Ray 7d ago
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2SC4373

Changjing · Bipolar (BJT) · SOT-89-3L

2SC4373 from Changjing, in a SOT-89-3L. 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, shown in the datasheet pin list as pin 1 of the SOT-89-3L package.
2 COLLECTOR passive Collector terminal of the NPN transistor, rated for a maximum collector current of 800 mA and VCEO of 120 V per the maximum ratings table.
3 EMITTER passive Emitter terminal of the NPN transistor, paired with the base and collector in the SOT-89-3L pin list.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-89-3L
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 120 V IC=1mA,IE=0 1
Collector-emitter breakdown voltage V(BR)CEO 120 V IC=10mA,IB=0 1
Emitter-base breakdown voltage V(BR)EBO 5 V IE=1mA,IC=0 1
Collector cut-off current ICBO 0.1 µA VCB=120V,IE=0 1
Emitter cut-off current IEBO 0.1 µA VEB=5V,IC=0 1
DC current gain hFE 80 240 VCE=5V, IC=100mA 1
Collector-emitter saturation voltage VCE(sat) 1 V IC=500mA,IB=50mA 1
Base-emitter voltage VBE 1 V VCE=5V, IC=500mA 1
Transition frequency fT 120 MHz VCE=5V,IC=500mA 1
Collector output capacitance Cob 30 pF VCB=10V, IE=0, f=1MHz 1
Collector-base voltage VCBO 120 V 1
Collector-emitter voltage VCEO 120 V 1
Emitter-base voltage VEBO 5 V 1
Collector current IC 800 mA 1
Collector power dissipation PC 500 mW 1
Operation junction and storage temperature range TJ,Tstg -55 150 ℃ 1
Thermal resistance from junction to ambient RθJA 250 ℃/W 1

CAD (KiCad official)

  • Symbol: 2SC4373
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: 2sc4373-etched.step / 2sc4373-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2sc4373.step / 2sc4373.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 41ee22b727b21bcb, retrieved 2026-10-18, 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