# SMLJ78CA-TP

**MCC(Micro Commercial Components)** · TVS · SMC(DO-214AB)

SMLJ78CA-TP from MCC(Micro Commercial Components), 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC(Micro Commercial Components) |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Dissipation on 10/1000μs Waveform | PPPM | 3000 |  |  | W | 10/1000μs waveform, Note 3,4, Fig.1 | 1 |
| Breakdown Voltage (SMLJ78CA) | VBR | 86.7 |  | 95.8 | V | IT = 1 mA | 3 |
| Max Clamping Voltage (SMLJ78CA) | VC |  |  | 126 | V | @ IPP = 22.8 A | 3 |
| Reverse Leakage Current (SMLJ78CA) | ID |  |  | 2 | µA | @ VWM = 78 V | 3 |
| Reverse Stand-Off Voltage (SMLJ78CA) | VWM |  | 78 |  | V |  | 3 |
| Operating Junction Temperature Range |  | -55 |  | 175 | °C |  | 1 |
| Storage Temperature Range |  | -55 |  | 175 | °C |  | 1 |
| Thermal Resistance Junction to Lead |  |  | 17.5 |  | °C/W |  | 1 |
| Thermal Resistance Junction to Ambient |  |  | 75 |  | °C/W |  | 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 |  | copper pads to each terminal. | 1 |

## CAD (KiCad official)

- Symbol: `SMLJ78CA-TP`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smlj78ca-tp-etched.step` / `smlj78ca-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smlj78ca-tp.step` / `smlj78ca-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC(Micro Commercial Components) datasheet](docs/smlj78ca-tp-datasheet.pdf) (8 pp, sha256 `bf49ac7e2607542d`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/smlj78ca-tp-datasheet.pdf)