component
SS8550 Y2
Public Made by Adomby adom
Changjing Bipolar (BJT), SOT-23. 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
markdownSS8550 Y2
Changjing · Bipolar (BJT) · SOT-23
SS8550 Y2 from Changjing, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BASE | input | Base control terminal for transistor conduction. |
| 2 | EMITTER | power_in | Emitter terminal connected to positive supply voltage, maximum VEBO -5 V. |
| 3 | COLLECTOR | output | Collector terminal with maximum collector current -1.5 A at 25 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| 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 | -40 | V | IC=-100µA, 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=-100µA, IC=0 | 1 | ||
| Collector cut-off current | ICBO | -100 | nA | VCB=-40V, IE=0 | 1 | ||
| Emitter cut-off current | IEBO | -100 | nA | VEB=-5V, IC=0 | 1 | ||
| DC current gain hFE(1) | hFE(1) | 120 | 400 | VCE=-1V, IC=-100mA | 1 | ||
| DC current gain hFE(2) | hFE(2) | 40 | VCE=-1V, IC=-800mA | 1 | |||
| 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 | ||
| Base-emitter voltage | VBE | -1 | V | VCE=-1V, IC=-10mA | 1 | ||
| Transition frequency | fT | 100 | MHz | VCE=-10V, IC=-50mA, f=30MHz | 1 | ||
| Collector output capacitance | Cob | 20 | pF | VCB=-10V, IE=0, f=1MHz | 1 | ||
| Collector-base voltage | VCBO | -40 | V | 1 | |||
| Collector-emitter voltage | VCEO | -25 | V | 1 | |||
| Emitter-base voltage | VEBO | -5 | V | 1 | |||
| Collector current | IC | -1.5 | A | 1 | |||
| Collector power dissipation | PC | 300 | mW | 1 | |||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal Resistance From Junction To Ambient | RΘJA | 417 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
SS8550 Y2 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
ss8550-y2-etched.step/ss8550-y2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ss8550-y2.step/ss8550-y2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (2 pp, sha256
27fbb2c399ee13c4, retrieved 2026-09-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).