# 2SA1294

**SPTECH** · Bipolar Transistors - BJT · TO-3PN

2SA1294 from SPTECH, in a TO-3PN. 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 of the PNP transistor; base current continuous max -4 A, emitter-base voltage max -5 V. |
| 2 | Collector | passive | Collector (also the mounting tab); VCBO and VCEO -230 V, continuous collector current -15 A, power dissipation 130 W at TC=25℃. |
| 3 | Emitter | passive | Emitter of the PNP transistor; emitter-base voltage max -5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SPTECH |
| Package | TO-3PN |
| 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-Emitter Breakdown Voltage | V(BR)CEO | -230 |  |  | V | IC= -25mA ; IB= 0 | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -2 | V | IC= -5.0A; IB= -0.5A | 2 |
| Collector Cutoff Current | ICBO |  |  | -100 | μA | VCB= -230V ; IE= 0 | 2 |
| Emitter Cutoff Current | IEBO |  |  | -100 | μA | VEB= -5V; IC= 0 | 2 |
| DC Current Gain | hFE | 50 |  | 140 |  | IC= -5A ; VCE= -4V | 2 |
| Collector-Base Voltage | VCBO | -230 |  |  | V |  | 1 |
| Collector-Emitter Voltage | VCEO | -230 |  |  | V |  | 1 |
| Emitter-Base Voltage | VEBO | -5 |  |  | V |  | 1 |
| Collector Current-Continuous | IC | -15 |  |  | A |  | 1 |
| Base Current-Continuous | IB | -4 |  |  | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 130 | W | @ TC=25℃ | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | 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 |
|---|---|---|---|---|
| housing | PC |  | IB Base Current-Continuous -4 A PC Collector Power Dissipation | 1 |

## CAD (KiCad official)

- Symbol: `2SA1294`
- Footprint: `Package_TO_SOT_THT:TO-3P-3_Vertical`
- 3D model: TO-3PN (KiCad packages3D, STEP)
- 3D model files: `2sa1294-etched.step` / `2sa1294-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sa1294.step` / `2sa1294.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SPTECH datasheet](docs/2sa1294-datasheet.pdf) (2 pp, sha256 `0646231e13c80dec`, retrieved 2026-11-07, 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/2sa1294-datasheet.pdf)