# TPSMAJ40A

**PTTC Polytronics Tech** · ESD And Surge Protection (TVS/ESD) · SMA(DO-214AC)

TPSMAJ40A from PTTC Polytronics Tech, in a SMA(DO-214AC). 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 terminal, marked by the color band on the uni-directional TPSMAJ40A; reverse stand-off voltage 40 V, breakdown 44.4-49.1 V at 1 mA, max clamping 64.5 V at 6.20 A. |
| 2 | A | passive | Anode terminal at the end opposite the cathode band; the 400 W (10/1000 µs) TVS conducts in forward direction from this pin on the uni-directional part. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PTTC Polytronics Tech |
| Package | SMA(DO-214AC) |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `TPSMAJ40A`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `tpsmaj40a-etched.step` / `tpsmaj40a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpsmaj40a.step` / `tpsmaj40a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PTTC Polytronics Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918354068955136) (6 pp, sha256 `7384dbc670e33d22`, 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/tpsmaj40a-datasheet.pdf)