# BUL216

**STMicroelectronics** · Bipolar (BJT) · TO-220

BUL216 from STMicroelectronics, in a TO-220. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | B | input | Base terminal of the NPN power transistor; base current IB max 2 A (IBM 4 A pulsed), used to drive the device into saturation (VBE(sat) up to 1.2 V). |
| 2 | C | passive | Collector terminal of the NPN power transistor, internally connected to the metal mounting tab; rated for collector current IC up to 4 A (ICM 6 A pulsed) and blocking voltages up to VCES 1600 V / VCEO 800 V. |
| 3 | E | passive | Emitter terminal of the NPN power transistor; emitter-base voltage rated VEBO 9 V (IE = 10 mA test condition). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BUL216`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `bul216-etched.step` / `bul216-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bul216.step` / `bul216.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588890187962834944) (6 pp, sha256 `f49f41b2015a4499`, retrieved 2026-09-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-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/bul216-datasheet.pdf)