# MPSA13

**Changjing** · Bipolar Transistors - BJT · TO-92

MPSA13 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 NPN Darlington transistor, which the datasheet rates for emitter-base voltage of 10 V and collector-emitter voltage of 30 V. |
| 2 | BASE | passive | Base terminal of the NPN Darlington transistor, which the datasheet specifies with base-emitter voltage VBE of 2.0 V max at VCE=5V and IC=100mA. |
| 3 | COLLECTOR | passive | Collector terminal of the NPN Darlington transistor, rated for 0.5 A continuous collector current and 625 mW collector power dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-92 |
| 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 breakdown voltage | V(BR)CBO | 30 |  |  | V | IC= 0.1mA,IE=0 | 2 |
| Collector-emitter breakdown voltage | V(BR)CEO | 30 |  |  | V | IC=1mA,IB=0 | 2 |
| Emitter-base breakdown voltage | V(BR)EBO | 10 |  |  | V | IE=0.1mA,IC=0 | 2 |
| Collector cut-off current | ICBO |  |  | 0.1 | A | VCB=30V,IE=0 | 2 |
| Emitter cut-off current | IEBO |  |  | 0.1 | A | VEB=10V,IC=0 | 2 |
| DC current gain hFE(1) | hFE(1) | 5000 |  |  |  | VCE=5V, IC=10mA; pulse test: pulse width 300us, duty cycle 2.0% | 2 |
| DC current gain hFE(2) | hFE(2) | 10000 |  |  |  | VCE=5V, IC=100mA; pulse test: pulse width 300us, duty cycle 2.0% | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 1.5 | V | IC=100mA,IB=0.1mA; pulse test: pulse width 300us, duty cycle 2.0% | 2 |
| Base-emitter voltage | VBE |  |  | 2 | V | VCE=5V,IC=100mA; pulse test: pulse width 300us, duty cycle 2.0% | 2 |
| Current gain-bandwidth product | fT | 125 |  |  | MHz | VCE=5V,IC=10mA,f=100MHz | 2 |
| Collector-base voltage | VCBO |  |  | 30 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | 30 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | 10 | V |  | 1 |
| Collector current -continuous | IC |  |  | 0.5 | A |  | 1 |
| Collector power dissipation | PC |  |  | 625 | mW |  | 1 |
| Operation junction and storage temperature range | TJ, Tstg | -55 |  |  |  |  | 1 |
| Thermal resistance from junction to ambient |  |  |  | 200 | /W |  | 1 |

## CAD (KiCad official)

- Symbol: `MPSA13`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `mpsa13-etched.step` / `mpsa13-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mpsa13.step` / `mpsa13.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/mpsa13-datasheet.pdf) (5 pp, sha256 `d70dde48fdda0c73`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (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).

[Datasheet PDF](docs/mpsa13-datasheet.pdf)