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2SA1661

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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2SA1661

Changjing · Bipolar (BJT) · SOT-89-3L

2SA1661 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 passive Base terminal of the PNP transistor; the datasheet's emitter-base breakdown limit is V(BR)EBO -5 V with IE=-1mA.
2 COLLECTOR passive Collector terminal of the PNP transistor; absolute maximum ratings are VCBO -120 V, VCEO -120 V and IC -0.8 A.
3 EMITTER passive Emitter terminal of the PNP transistor; the datasheet's emitter-base breakdown limit is V(BR)EBO -5 V with IC=0.

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=-0.1A, f=30MHz 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 -0.8 A 1
Collector power dissipation PC 500 mW 1
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1
Thermal resistance from junction to ambient RθJA 250 ℃/W 1

CAD (KiCad official)

  • Symbol: 2SA1661
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: 2sa1661-etched.step / 2sa1661-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2sa1661.step / 2sa1661.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 91e42c25bed50c40, 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