# T1210T-8T

**STMicroelectronics** · Thyristors (SCR)/Modules · TO-220AB-3

T1210T-8T from STMicroelectronics, in a TO-220AB-3. 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 | A1 | passive | Main terminal 1, the reference for A2 and gate polarity, carrying up to IT(RMS) = 12 A on-state RMS current at Tc = 131 °C. |
| 2 | A2 | passive | Main terminal 2, which blocks a repetitive peak off-state voltage VDRM/VRRM of 800 V at Tj = 125 °C and carries IT(RMS) = 12 A. |
| 3 | G | input | Gate trigger input needing IGT of at most 10 mA (VD = 12 V, RL = 30 Ω) and VGT of at most 1.3 V, with peak gate current IGM limited to 4 A (tp = 20 µs). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `T1210T-8T`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220AB-3 (KiCad packages3D, STEP)
- 3D model files: `t1210t-8t-etched.step` / `t1210t-8t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `t1210t-8t.step` / `t1210t-8t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/t1210t-8t.pdf) (11 pp, sha256 `8410cf1eb4d8fa6a`, retrieved 2026-11-02, tier: manufacturer)
- **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/t1210t-8t-datasheet.pdf)