# SMCJ40CA-TR

**STMicroelectronics** · ESD And Surge Protection (TVS/ESD) · SMC(DO-214AB)

SMCJ40CA-TR from STMicroelectronics, in a SMC(DO-214AB). 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 | Bidirectional TVS terminal with no polarity; either terminal may connect to the protected line, with stand-off voltage VRM 40 V and breakdown 44.4 to 46.7 V in both directions. |
| 2 | A2 | passive | Second bidirectional TVS terminal with no polarity; 1500 W (10/1000 µs) peak pulse power, clamping 64.5 V at 24 A (10/1000 µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SMC(DO-214AB) |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SMCJ40CA-TR`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smcj40ca-tr-etched.step` / `smcj40ca-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smcj40ca-tr.step` / `smcj40ca-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879993380483072) (10 pp, sha256 `3e2a8c449f34f529`, retrieved 2026-10-13, 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/smcj40ca-tr-datasheet.pdf)