# T1635T-6I

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

T1635T-6I from STMicroelectronics, in a TO-220AB. 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 A1, the reference terminal for A2 polarity and the gate trigger, with IT(RMS) of 16 A at Tc = 86 °C. |
| 2 | A2 | passive | Main terminal A2, which blocks VDRM/VRRM of 600 V and carries up to 16 A rms on-state current. |
| 3 | G | input | Gate trigger input, where the T1635T needs IGT of 35 mA max (VD = 12 V, RL = 30 Ω) and VGT of 1.3 V max. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `T1635T-6I`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220AB (KiCad packages3D, STEP)
- 3D model files: `t1635t-6i-etched.step` / `t1635t-6i-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `t1635t-6i.step` / `t1635t-6i.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/t1635t-6i.pdf) (9 pp, sha256 `26dd94dbd9401a7e`, retrieved 2026-11-06, 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/t1635t-6i-datasheet.pdf)