# TIP42C

**JSMSEMI** · Bipolar (BJT) · TO-220

TIP42C from JSMSEMI, in a TO-220. 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; continuous base current is limited to -2.0 A and emitter-to-base voltage to -5.0 V. |
| 2 | Collector | passive | Collector terminal of the PNP transistor; for TIP42C, VCEO is -100 V, continuous collector current is limited to -6.0 A (peak -10 A), and collector power dissipation is 65 W at Tc=25°C. |
| 3 | Emitter | passive | Emitter terminal of the PNP transistor; emitter-to-base voltage is limited to -5.0 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | TO-220 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TIP42C`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `tip42c-etched.step` / `tip42c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tip42c.step` / `tip42c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945060679864320) (4 pp, sha256 `8d61dcc13a4751fe`, retrieved 2026-10-09, 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/tip42c-datasheet.pdf)