# TPSMBJ12A

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SMB

TPSMBJ12A from TECH PUBLIC, in a SMB. 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 | Cathode | passive | Cathode terminal marked by the cathode band on the SMB body; the unidirectional TPSMBJ12A has a 12 V reverse stand-off voltage (VR), 13.30-14.70 V breakdown at 1 mA, and clamps at 19.9 V max at 30.2 A peak pulse current. |
| 2 | Anode | passive | Anode terminal at the end opposite the cathode band; the unidirectional TPSMBJ12A is rated for 600 W minimum peak pulse power on a 10/1000 us waveform. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SMB |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `TPSMBJ12A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `tpsmbj12a-etched.step` / `tpsmbj12a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpsmbj12a.step` / `tpsmbj12a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604432785709023232) (6 pp, sha256 `0fdea8deadcc760b`, retrieved 2026-11-07, 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/tpsmbj12a-datasheet.pdf)