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KTC4373

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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KTC4373

Changjing · Bipolar (BJT) · SOT-89-3L

KTC4373 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 NPN transistor base terminal; the datasheet's maximum ratings table lists VEBO 5 V and the emitter-base breakdown voltage is 5 V minimum at IE=1mA.
2 COLLECTOR passive NPN transistor collector terminal; rated for VCBO 120 V, VCEO 120 V, and collector current IC 800 mA with collector power dissipation PC 500 mW.
3 EMITTER passive NPN transistor emitter terminal; the emitter-base voltage rating VEBO is 5 V and the emitter cut-off current is 100 nA max at VEB=5V.

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 100 nA VCB=120V,IE=0 1
Emitter cut-off current IEBO 100 nA 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
Collector output capacitance Cob 30 pF VCB=10V,IE=0, f=1MHz 1
Transition frequency fT 120 MHz VCE=5V,IC= 500mA 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
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1
Thermal resistance, junction to ambient RθJA 250 ℃/W 1

CAD (KiCad official)

  • Symbol: KTC4373
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: ktc4373-etched.step / ktc4373-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ktc4373.step / ktc4373.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (1 pp, sha256 fb7b61e01e4397b3, retrieved 2026-10-19, 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