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KTA1666Y

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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KTA1666Y

Changjing · Bipolar (BJT) · SOT-89-3L

KTA1666Y 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 KTA1666 PNP transistor; VBE(sat) is specified at IC=-1A and IB=-50mA with a maximum of -1.2 V.
2 COLLECTOR passive Collector terminal; rated for VCBO and VCEO of -50 V, IC of -2 A, and PC of 500 mW.
3 EMITTER passive Emitter terminal; emitter-base breakdown voltage V(BR)EBO is -5 V minimum and VEBO is rated -5 V.

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 -50 V IC= -1mA,IE=0 1
Collector-emitter breakdown voltage V(BR)CEO -50 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=-50V,IE=0 1
Emitter cut-off current IEBO -100 nA VEB=-5V,IC=0 1
DC current gain, rank Y (hFE(1) range 120-240) hFE(1) 120 240 VCE=-2V, IC=-500mA 1
DC current gain hFE(2) 40 VCE=-2V, IC=-1.5A 1
Collector-emitter saturation voltage VCE(sat) -0.5 V IC=-1A,IB=-50mA 1
Base-emitter saturation voltage VBE(sat) -1.2 V IC=-1A,IB=-50mA 1
Collector output capacitance Cob 40 pF VCB=-10V,IE=0, f=1MHz 1
Transition frequency fT 120 MHz VCE=-2V,IC= -500mA 1
Collector-base voltage VCBO -50 V 1
Collector-emitter voltage VCEO -50 V 1
Emitter-base voltage VEBO -5 V 1
Collector current IC -2 A 1
Collector power dissipation PC 500 mW 1
Operation junction and storage temperature range TJ,Tstg -55 150 ℃ 1
Thermal resistance, junction to ambient RθJA 250 ℃/W 1

CAD (KiCad official)

  • Symbol: KTA1666Y
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: kta1666y-etched.step / kta1666y-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); kta1666y.step / kta1666y.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 848c23bb33288abd, 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