# SMDJ22AQ

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

SMDJ22AQ from Yangzhou Yangjie Elec Tech, in a DO-214AB(SMC). 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 | Yangzhou Yangjie Elec Tech |
| Package | DO-214AB(SMC) |
| 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 | 24.4 |  | 26.9 | V | IT = 1 mA; pulse test tp≤50ms (note 4) | 2 |
| Maximum Reverse Leakage | IR |  |  | 1 | μA | @ VRWM = 22 V | 2 |
| Maximum Reverse Surge Current | IPP |  |  | 84.51 | A | Surge waveform per Fig.3, derated per Fig.2 (note 6) | 2 |
| Maximum Clamping Voltage | VC |  |  | 35.5 | V | @ IPP | 2 |
| Maximum Instantaneous Forward Voltage | VF |  |  | 3.5 | V | @ 100A, unidirectional only | 1 |
| Peak Power Dissipation | PPPM |  |  | 3000 | W | 10/1000us waveform (notes 1, 2; Fig.1) | 1 |
| Power Dissipation | PD |  |  | 6.5 | W | On infinite heat sink at TL=75℃ (note 2) | 1 |
| Peak Forward Surge Current | IFSM |  |  | 300 | A | 8.3 ms single half sine-wave, unidirectional only (note 3) | 1 |
| Operating Junction Temperature | TJ | -55 |  | 175 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 175 | ℃ |  | 1 |
| Working Peak Reverse Voltage | VRWM |  | 22 |  | V | Uni-directional SMDJ22AQ | 2 |
| Thermal Resistance (Typical), junction to ambient | RθJA |  | 75 |  | ℃/W | junction to ambient | 2 |
| Thermal Resistance (Typical), junction to lead | RθJL |  | 15 |  | ℃/W | junction to lead | 2 |

## CAD (KiCad official)

- Symbol: `SMDJ22AQ`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files: `smdj22aq-etched.step` / `smdj22aq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smdj22aq.step` / `smdj22aq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603065272815808512) (5 pp, sha256 `f699c92f072cb9bb`, retrieved 2026-10-15, 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/smdj22aq-datasheet.pdf)