# MPSA56

**Changjing** · Bipolar (BJT) · TO-92

MPSA56 from Changjing, in a TO-92. 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 MPSA56 PNP transistor; the emitter-base breakdown voltage is -4 V minimum magnitude per V(BR)EBO and VEBO is rated -4 V. |
| 2 | BASE | passive | Base terminal of the MPSA56 PNP transistor; base-emitter voltage is specified at VBE = -1.2 V (max) with IC = -100 mA and VCE = -1 V. |
| 3 | COLLECTOR | passive | Collector terminal of the MPSA56 PNP transistor; rated VCBO and VCEO of -80 V, collector current IC of -0.5 A, and collector power dissipation PC of 625 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-92 |
| 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 | -80 |  |  | V | IC= -0.1mA,IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | -80 |  |  | V | IC=-1mA,IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | -4 |  |  | V | IE=-0.1mA,IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | -0.1 | μA | VCB=-80V,IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -0.1 | μA | VEB=-4V,IC=0 | 1 |
| DC current gain | hFE(1) | 100 |  |  |  | VCE=-1V, IC=-10mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.25 | V | IC=-100mA,IB=-10mA | 1 |
| Base-emitter voltage | VBE |  |  | -1.2 | V | IC=-100mA, VCE=-1V | 1 |
| Transition frequency | fT | 50 |  |  | MHz | VCE=-1V,IC=-100mA,f=100MHz | 1 |
| Collector-Base Voltage | VCBO |  |  | -80 | V |  | 1 |
| Collector-Emitter Voltage | VCEO |  |  | -80 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | -4 | V |  | 1 |
| Collector Current | IC |  |  | -0.5 | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 625 | mW |  | 1 |
| Junction Temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance From Junction To Ambient | RθJA |  |  | 200 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `MPSA56`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `mpsa56-etched.step` / `mpsa56-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mpsa56.step` / `mpsa56.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/8588887149412290560) (2 pp, sha256 `35b6f999922c0cd8`, retrieved 2026-10-19, 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/mpsa56-datasheet.pdf)