# BTB24-800BW

**KY** · Thyristors (SCR)/Modules · TO-263

BTB24-800BW 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 of the triac (the datasheet symbol shows T1(1)); the part is rated for 25 A RMS on-state current (IT(RMS)). |
| 2 | T2 | passive | Main terminal T2 of the triac (the datasheet symbol shows T2(2)), connected to the TO-263 tab, with a repetitive peak off-state voltage VDRM/VRRM of 800 V for the -800 version. |
| 3 | G | input | Gate trigger input (the datasheet symbol shows G(3)); it needs a gate trigger voltage VGT of at most 1.5 V at VD=12 V, RL=30 Ω. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | TO-263 |
| Category | Transistors/Thyristors |
| 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 |
|---|---|---|---|---|---|---|---|
| Repetitive Peak Off-State Current | IDRM |  |  | 3 | mA | Tj= °C | 3 |
| Repetitive Peak Reverse Current | IRRM |  |  | 3 | mA | Tj= °C | 3 |
| Gate trigger current | IGT |  |  | 50 | mA | I,II,III; VD=12V RL=30Ω | 3 |
| Holding current | IH |  |  | 80 | mA | IT=0.2A | 3 |
| Gate trigger voltage | VGT |  |  | 1.5 | V | VD=12V ,RL=30Ω | 3 |
| Forward on voltage | VTM |  |  | 1.55 | V | IT=35A tp=380us | 3 |
| Surge on-state current | ITSM |  |  | 280 | A | tp=16.7ms | 3 |
| Surge on-state current | ITSM |  |  | 300 | A | tp=10ms | 3 |
| I²t for fusing | I²t |  |  | 520 | A²s | Tp=10ms | 3 |
| R.M.S On-State Current | IT(RMS) |  |  | 25 | A | Tc=110°C | 3 |
| Repetitive Peak Off-State Voltage | VDRM |  |  | 800 | V |  | 3 |
| Average Gate Power Dissipation | PG(AV) |  |  | 1 | W | Tj=150°C | 3 |
| Peak Gate Current | IGM |  |  | 6 | A | Tj= °C | 3 |
| Gate non-trigger voltage | VDG | 0.2 |  |  | V | ALL VD=VDRM TJ= °C | 3 |
| Critical rate of rise of commutation voltage | dv/dt | 1000 |  |  | V/us | TJ= °C VD=2/3VDRM Gate open circuit | 3 |
| Critical rate of rise of on-state current |  | 50 |  |  | A/us | I,II,III F=120Hz,Tj= °C IG=2xIGT,tr≤100ns | 3 |
| Operating Junction Temperature | Tj | -40 |  |  | °C |  | 3 |
| Storage Temperature | TSTG | -40 |  | 150 | °C |  | 3 |

## CAD (KiCad official)

- Symbol: `BTB24-800BW`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `btb24-800bw-etched.step` / `btb24-800bw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `btb24-800bw.step` / `btb24-800bw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KY datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757119965768237056) (7 pp, sha256 `0d7bfd6e2d54aa1a`, retrieved 2026-10-17, 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/btb24-800bw-datasheet.pdf)