# 2SA1576A

**Changjing** · Bipolar (BJT) · SOT-323

2SA1576A from Changjing, in a SOT-323. 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 | input | Base terminal of the PNP transistor; emitter-base breakdown voltage V(BR)EBO is -6 V minimum at IE=-50μA, IC=0. |
| 2 | EMITTER | passive | Emitter terminal of the PNP transistor; the absolute maximum emitter-base voltage VEBO is -6 V. |
| 3 | COLLECTOR | passive | Collector terminal of the PNP transistor; absolute maximum ratings are VCBO -60 V, VCEO -50 V and collector current IC -150 mA, with PC 200 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-323 |
| 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 | -60 |  |  | V | IC=-50μA,IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | -50 |  |  | V | IC=-1mA,IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | -6 |  |  | V | IE=-50μA,IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | -0.1 | μA | VCB=-60V,IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -0.1 | μA | VEB=-6V,IC=0 | 1 |
| DC current gain | hFE | 120 |  | 560 |  | VCE=-6V,IC=-1mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.5 | V | IC=-50mA,IB=-5mA | 1 |
| Transition frequency | fT | 140 |  |  | MHz | VCE=-12V,IC=-2mA,f=30MHz | 1 |
| Collector output capacitance | Cob |  | 4 | 5 | pF | VCB=-12V,IE=0,f=1MHz | 1 |
| Collector-base voltage | VCBO |  |  | -60 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -50 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -6 | V |  | 1 |
| Collector current | IC |  |  | -150 | mA |  | 1 |
| Collector power dissipation | PC |  |  | 200 | mW |  | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance from junction to ambient | RΘJA |  | 625 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `2SA1576A`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `2sa1576a-etched.step` / `2sa1576a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sa1576a.step` / `2sa1576a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175206024466432) (4 pp, sha256 `729d5f98e6fbfd91`, retrieved 2026-10-18, 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](docs/2sa1576a-datasheet.pdf)