# 2SA812-M5

**Yangzhou Yangjie Elec Tech** · Bipolar (BJT) · SOT-23

2SA812-M5 from Yangzhou Yangjie Elec Tech, in a SOT-23. 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 | B | input | Base; the datasheet lists VEBO of -5 V and IEBO of -0.1 uA max at VEB=-5 V. |
| 2 | E | passive | Emitter; the datasheet gives a maximum emitter-base voltage VEBO of -5 V. |
| 3 | C | passive | Collector; the datasheet gives VCBO of -60 V, VCEO of -50 V and a maximum collector current of -0.1 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| 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 | VCBO | -60 |  |  | V | IC=-100μA,IE=0 | 1 |
| Collector-emitter breakdown voltage | VCEO | -50 |  |  | V | IC=-1mA,IB=0 | 1 |
| Emitter-base breakdown voltage | VEBO | -5 |  |  | V | IE=-100μA,IC=0 | 1 |
| Collector-base cut-off current | ICBO |  |  | -0.1 | uA | VCB=-60 V ,IE=0 | 1 |
| Emitter-base cut-off current | IEBO |  |  | -0.1 | uA | VEB=-5 V , IC=0 | 1 |
| DC current gain (rank M5) | hFE | 135 |  | 270 |  | VCE=-6V,IC=-1mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.3 | V | IC=-100mA,IB=-10mA | 1 |
| Base-emitter voltage | VBE |  |  | -0.68 | V | VCE=-6V,IC=-1mA | 1 |
| Transition frequency | fT | 180 |  |  | MHz | VCE= -6V, IC=-10mA | 1 |
| Collector-base output capacitance | Cob |  |  | 4.5 | pF | VCB=-10V,IE=0,f=1MHz | 1 |
| Collector-Base Voltage | VCBO |  |  | -60 | V | IC=-100μA,IE=0 | 1 |
| Collector-Emitter Voltage | VCEO |  |  | -50 | V | IC =-1mA,IB=0 | 1 |
| Emitter-Base Voltage | VEBO |  |  | -5 | V | IE=-100μA,IC=0 | 1 |
| Collector Current | IC |  |  | -0.1 | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 200 | mW |  | 1 |
| Junction Temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `2SA812-M5`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `2sa812-m5-etched.step` / `2sa812-m5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sa812-m5.step` / `2sa812-m5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917696826523648) (4 pp, sha256 `d2bb1cc5ebaec726`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/2sa812-m5-datasheet.pdf)