# TN2540-12G-TR

**STMicroelectronics** · Thyristors (SCR)/Modules · D2PAK

TN2540-12G-TR from STMicroelectronics, in a D2PAK. 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 | K | passive | Cathode, carrying the on-state current of up to 25 A RMS (IT(RMS) at Tc = 102 °C). |
| 2 | A | passive | Anode, also connected to the backside tab, blocking up to 1200 V (VDRM/VRRM). |
| 3 | G | input | Gate trigger input with IGT max 40 mA (VD = 12 V, RL = 33 Ω), VGT max 1.3 V and peak gate current IGM of 4 A (tp = 20 µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | D2PAK |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TN2540-12G-TR`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: D2PAK (KiCad packages3D, STEP)
- 3D model files: `tn2540-12g-tr-etched.step` / `tn2540-12g-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tn2540-12g-tr.step` / `tn2540-12g-tr.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/tn2540-12g-tr.pdf) (10 pp, sha256 `85f7ed4dfdbe0e34`, 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/tn2540-12g-tr-datasheet.pdf)