# BTB26-800B

**KY** · TRIACs · TO-263

BTB26-800B from KY, in a TO-263. 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 T1 (T1(1) in the symbol), the current-carrying terminal on the opposite side of the triac from T2, rated IT(RMS) 25A at Tc=110°C. |
| 2 | T2 | passive | Main terminal T2 (T2(2) in the symbol), connected to the tab, with repetitive peak off-state voltage VDRM/VRRM of 800V for the -800 version. |
| 3 | G | input | Gate trigger input (G(3) in the symbol) with gate trigger voltage VGT ≤1.5V at VD=12V, RL=30Ω. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | TO-263 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BTB26-800B`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `btb26-800b-etched.step` / `btb26-800b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `btb26-800b.step` / `btb26-800b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KY datasheet](docs/btb26-800b-datasheet.pdf) (7 pp, sha256 `b9ad868fbb595d26`, retrieved 2026-10-28, 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/btb26-800b-datasheet.pdf)