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KSA1220A

Public Made by Adom

by adom

Changjing Bipolar Transistors - BJT, TO-126. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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KSA1220A

Changjing · Bipolar Transistors - BJT · TO-126

KSA1220A from Changjing, in a TO-126. 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 EMITTER passive Emitter terminal of the KSA1220A PNP transistor in the TO-126 package, listed as pin 1 in the datasheet pinout.
2 COLLECTOR passive Collector terminal of the KSA1220A PNP transistor, with collector-emitter voltage rated at -160 V and DC collector current at -1.2 A.
3 BASE passive Base terminal of the KSA1220A PNP transistor, with base current rated at -0.3 A.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-126
Category Triode/MOS Tube/Transistor
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 Voltage VCBO -160 V KSA1220A 1
Collector-Emitter Voltage VCEO -160 V KSA1220A 1
Emitter-Base Voltage VEBO -5 V 1
Collector Current (DC) IC -1.2 A 1
Collector Current (pulse) ICP -2.5 A PW ≤10ms,Duty Cycle ≤2 % 1
Base Current IB -0.3 A 1
Collector Power Dissipation PC 1.25 W Ta = 25 ℃ 1
Collector Power Dissipation PC 20 W Tc = 25 ℃ 1
Operation Junction and Storage Temperature Range TJ,Tstg -55 150 ℃ 1
Collector cut-off current ICBO -1 μA VCB=-120V, IE=0 2
Emitter cut-off current IEBO -1 μA VEB=-3 V, IC=0 2
DC current gain hFE(1) 35 VCE=-5V, IC=-5mA 2
DC current gain hFE(2) 60 320 VCE=-5V, IC=-300mA 2
Collector-emitter saturation voltage VCE(sat) -0.4 -0.7 V IC=-1 A, IB=-200mA (1) 2
Base-emitter saturation voltage VBE(sat) -1 -1.3 V IC=-1 A, IB=-200mA (1) 2
Transition frequency fT 175 MHz VCE=-5V, IC=-200mA 2
Collector output capacitance Cob 26 pF VCB=-10V, IE=0, f=1MHz 2

CAD (KiCad official)

  • Symbol: KSA1220A
  • Footprint: Package_TO_SOT_THT:TO-126-3_Vertical
  • 3D model: TO-126 (KiCad packages3D, STEP)
  • 3D model files: ksa1220a-etched.step / ksa1220a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ksa1220a.step / ksa1220a.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (3 pp, sha256 1f9e824f10ee6b53, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), 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