component
KSA1220A
Public Made by Adomby adom
Changjing Bipolar Transistors - BJT, TO-126. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownKSA1220A
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ksa1220a.step/ksa1220a.glbare 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, primaryclaude-haiku-5-5(text), consensusoff(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).