# SMCJ28CA-AT

**Brightking Elec (TAIWAN)** · TVS · SMC(DO-214AB)

SMCJ28CA-AT from Brightking Elec (TAIWAN), 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 | Terminal 1 | passive | Bidirectional (CA) TVS terminal with VRWM 28V, VBR 31.10~34.40V at 1mA and VC 45.4V at 33.1A IPP; no polarity, interchangeable with the other terminal. |
| 2 | Terminal 2 | passive | Bidirectional (CA) TVS terminal with VRWM 28V, VBR 31.10~34.40V at 1mA and VC 45.4V at 33.1A IPP; no polarity, interchangeable with the other terminal. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 31.1 |  | 34.4 | V | @IT=1mA | 3 |
| Reverse Stand-Off Voltage | VRWM |  | 28 |  | V |  | 3 |
| Maximum Clamping Voltage | VC |  |  | 45.4 | V | @IPP=33.1A | 3 |
| Peak Pulse Current | IPP |  |  | 33.1 | A | 10/1000μs waveform | 3 |
| Reverse Leakage | IR |  |  | 1 | μA | @VRWM | 3 |
| Test Current | IT |  | 1 |  | mA |  | 3 |
| Peak pulse power dissipation | PPPM | 1500 |  |  | Watts | 10/1000μs waveform, Minimum | 1 |
| Steady state power dissipation | PM(AV) |  |  | 6.5 | Watts | TA=50℃ | 1 |
| Peak forward surge current | IFSM |  |  | 200 | Amps | 8.3ms single half sine-wave superimposed on rated load | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance junction to lead | RθJL |  | 15 |  | ℃/W | Typical | 1 |
| Thermal resistance junction to ambient | RθJA |  | 75 |  | ℃/W | Typical | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | 2. Mounted on 8.0mm×8.0mm copper pads to each terminal. | 1 |

## CAD (KiCad official)

- Symbol: `SMCJ28CA-AT`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smcj28ca-at-etched.step` / `smcj28ca-at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smcj28ca-at.step` / `smcj28ca-at.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Brightking Elec (TAIWAN) datasheet](docs/smcj28ca-at-datasheet.pdf) (6 pp, sha256 `7e72475ef0547e76`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/smcj28ca-at-datasheet.pdf)