# SMAJ43CA-TP

**MCC(美微科)** · IC · SMA(DO-214AC)

SMAJ43CA-TP from MCC(美微科), 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 | 1 | passive | One of two interchangeable terminals of the bidirectional TVS SMAJ43CA, which clamps in either polarity with a working peak reverse voltage VRWM of 43 V and breakdown VBR of 47.8 to 52.8 V at IT = 1 mA. |
| 2 | 2 | passive | The second of two interchangeable terminals of the bidirectional TVS SMAJ43CA, rated for 400 W peak pulse power on a 10/1000 µs waveform, with a maximum clamping voltage of 69.4 V at IPP = 5.7 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC(美微科) |
| Package | SMA(DO-214AC) |
| Category |  |
| 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 (bi-directional, CA) | VBR | 47.8 |  | 52.8 | V | @IT = 1 mA | 3 |
| Maximum Reverse Leakage | IR |  |  | 1 | μA | @VRWM = 43.0 V | 3 |
| Maximum Clamping Voltage | VC |  |  | 69.4 | V | @IPP = 5.7 A | 3 |
| Maximum Reverse Surge Current | IPP |  |  | 5.7 | A |  | 3 |
| Working Peak Reverse Voltage | VRWM |  |  | 43 | V |  | 3 |
| Peak Pulse Power Dissipation | PPPM |  |  | 400 | W | 10/1000μs waveform (Note 3) | 1 |
| Power Dissipation on Infinite Heatsink | PD |  |  | 1.5 | W | TL = 75°C | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 175 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 175 | ℃ |  | 1 |
| Typical Thermal Resistance Junction to Lead | RθJL |  | 30 |  | ℃/W |  | 2 |
| Typical Thermal Resistance Junction to Ambient | RθJA |  | 120 |  | ℃/W |  | 2 |
| Typical Thermal Resistance Junction to Case | RθJC |  | 20 |  | ℃/W |  | 2 |

## 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 |  | 6. Mounted on 0.2 x 0.2" (5.0 x 5.0 mm) copper pads to each terminal. | 2 |

## CAD (KiCad official)

- Symbol: `SMAJ43CA-TP`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `smaj43ca-tp-etched.step` / `smaj43ca-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smaj43ca-tp.step` / `smaj43ca-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC(美微科) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590348269428903936) (5 pp, sha256 `13bcafd7f8fcba0f`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/smaj43ca-tp-datasheet.pdf)