# BT138S-600D

**JSMSEMI** · Thyristors (SCR)/Modules · TO-252

BT138S-600D from JSMSEMI, in a TO-252. 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 rates the part for 600 V VDRM/VRRM and 12 A IT(RMS). |
| 2 | T2 | passive | Main terminal T2 of the triac; the datasheet rates the part for 600 V VDRM/VRRM and 12 A IT(RMS). |
| 3 | G | input | Gate terminal; the BT138S-600D has IGT max 5 mA in quadrants I-II-III and 10 mA in quadrant IV (VD=12 V, RL=33 Ω), with VGT max 1 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | TO-252 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BT138S-600D`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `bt138s-600d-etched.step` / `bt138s-600d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bt138s-600d.step` / `bt138s-600d.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](docs/bt138s-600d-datasheet.pdf) (5 pp, sha256 `6ff7f79ce15e0d33`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/bt138s-600d-datasheet.pdf)