component
8550SS-TA
Public Made by Adomby adom
Changjing Bipolar (BJT), TO-92-3. 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
markdown8550SS-TA
Changjing · Bipolar (BJT) · TO-92-3
8550SS-TA from Changjing, in a TO-92-3. 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 PNP transistor; the datasheet limits the emitter-base voltage to -5 V (VEBO). |
| 2 | COLLECTOR | passive | Collector terminal of the PNP transistor; the datasheet limits continuous collector current to -1.5 A, collector-base voltage to -40 V (VCBO), and collector power dissipation to 1 W. |
| 3 | BASE | passive | Base terminal of the PNP transistor; the datasheet gives VBE(sat) of -1.2 V at IC=-800 mA, IB=-80 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-92-3 |
| 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-emitter saturation voltage | VCE(sat) | -0.5 | V | IC=-800mA,IB=-80mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | -1.2 | V | IC=-800mA,IB=-80mA | 1 | ||
| DC current gain hFE(1) | hFE(1) | 85 | 300 | VCE=-1, IC=-100mA | 1 | ||
| DC current gain hFE(2) | hFE(2) | 40 | VCE=-1V, IC=-800mA | 1 | |||
| Transition frequency | fT | 100 | MHz | VCE=-10V,IC=-50mA,f=30MHz | 1 | ||
| Collector-base breakdown voltage | V(BR)CBO | -40 | V | IC= -0.1mA,IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | -25 | V | IC=-0.1mA,IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | -5 | V | IE=-0.1mA,IC=0 | 1 | ||
| Collector cut-off current | ICBO | -0.1 | μA | VCB=-40V,IE=0 | 1 | ||
| Emitter cut-off current | IEBO | -0.1 | μA | VEB=-5V,IC=0 | 1 | ||
| Collector-base voltage | VCBO | -40 | V | 1 | |||
| Collector-emitter voltage | VCEO | -25 | V | 1 | |||
| Emitter-base voltage | VEBO | -5 | V | 1 | |||
| Collector current, continuous | IC | -1.5 | A | Continuous | 1 | ||
| Collector power dissipation | PC | 1 | W | 1 | |||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to ambient | RθJA | 125 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
8550SS-TA - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
8550ss-ta-etched.step/8550ss-ta-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);8550ss-ta.step/8550ss-ta.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (2 pp, sha256
719b36a5f64af94c, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).