# TPSMBJ20A

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

TPSMBJ20A 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 | K | passive | Cathode of the unidirectional TVS, marked by the cathode band on the SMB (DO-214AA) body; TPSMBJ20A has VR 20 V, VBR 22.20-24.50 V at 1 mA and VC 32.4 V max at IPP 18.6 A. |
| 2 | A | passive | Anode of the unidirectional TVS on the SMB (DO-214AA) package, the terminal opposite the cathode band; peak pulse power is min 600 W on 10/1000 us waveform. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `TPSMBJ20A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `tpsmbj20a-etched.step` / `tpsmbj20a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpsmbj20a.step` / `tpsmbj20a.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/8604435865007771648) (6 pp, sha256 `4f7dc611f4b91fda`, 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/tpsmbj20a-datasheet.pdf)