# SMCJ30AQ

**Yangzhou Yangjie Elec Tech** · ESD And Surge Protection (TVS/ESD) · SMC(DO-214AB)

SMCJ30AQ from Yangzhou Yangjie Elec Tech, 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 terminal, marked by the band on the uni-directional SMCJ30AQ; working peak reverse voltage 30 V, breakdown 33.3 V to 36.8 V at 1 mA, maximum clamping voltage 48.4 V at 31.0 A. |
| 2 | A | passive | Anode terminal at the end opposite the cathode band on the uni-directional SMCJ30AQ; maximum forward voltage 3.5 V at 100 A and peak forward surge current 200 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| 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 | 33.3 |  | 36.8 | V | @ IT = 1 mA | 2 |
| Test current for breakdown voltage | IT |  | 1 |  | mA | Pulse test tp≤50ms | 2 |
| Maximum Reverse Leakage | IR |  |  | 1 | μA | @ VRWM | 2 |
| Working Peak Reverse Voltage | VRWM |  | 30 |  | V |  | 2 |
| Maximum Reverse Surge Current | IPP |  |  | 31 | A | Surge waveform per Fig.3, derated per Fig.2 | 2 |
| Maximum Clamping Voltage | Vc |  |  | 48.4 | V | @ IPP | 2 |
| Maximum instantaneous forward voltage | VFM |  |  | 3.5 | V | at 100A, unidirectional only | 1 |
| Peak power dissipation | PPPM |  |  | 1500 | W | 10/1000us waveform | 1 |
| Power dissipation on infinite heat sink | PD |  |  | 6.5 | W | TL=75℃ | 1 |
| Peak forward surge current | IFSM |  |  | 200 | A | 8.3 ms single half sine-wave, unidirectional only | 1 |
| Operating junction temperature | TJ | -55 |  | 175 | ℃ |  | 1 |
| Storage temperature range | TSTG | -55 |  | 175 | ℃ |  | 1 |
| Thermal resistance junction to ambient | RθJ-A |  | 75 |  | ℃/W | junction to ambient | 3 |
| Thermal resistance junction to lead | RθJ-L |  | 15 |  | ℃/W | junction to lead | 3 |

## 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 |
|---|---|---|---|---|
| housing |  | black | 4. Body color: Black | 4 |
| contacts |  | tin | ● Terminals: Matte tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `SMCJ30AQ`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smcj30aq-etched.step` / `smcj30aq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smcj30aq.step` / `smcj30aq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](docs/smcj30aq-datasheet.pdf) (7 pp, sha256 `bc358d52c706a87f`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/smcj30aq-datasheet.pdf)