# BTA12-800B

**KY** · TRIACs · TO-220

BTA12-800B from KY, 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 | T1 | passive | Main terminal 1 (T1) of the triac, the current return and gate reference terminal, carrying up to IT(RMS) 12 A at Tc=110°C. |
| 2 | T2 | passive | Main terminal 2 (T2) of the triac, rated for repetitive peak off-state voltage VDRM/VRRM of 800 V for the -800 version and IT(RMS) 12 A at Tc=110°C. |
| 3 | G | input | Gate trigger input (G) with gate trigger voltage VGT of at most 1.3 V at VD=12 V and RL=30 Ω. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | TO-220 |
| Category | Transistors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BTA12-800B`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `bta12-800b-etched.step` / `bta12-800b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bta12-800b.step` / `bta12-800b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KY datasheet](docs/bta12-800b-datasheet.pdf) (7 pp, sha256 `4b7941769a7eb9cf`, retrieved 2026-10-27, 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/bta12-800b-datasheet.pdf)