# SMBJ20CAQ

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

SMBJ20CAQ from Yangzhou Yangjie Elec Tech, in a DO-214AA(SMB). 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-214AA(SMB) |
| 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 power dissipation, 10/1000us waveform | PPPM |  |  | 600 | W | 10/1000us waveform (1) (2) (Fig.1) | 1 |
| Power dissipation, on infinite heat sink | PD |  |  | 5 | W | on infinite heat sink at TL=75℃ | 1 |
| Operating junction temperature range | TJ | -55 |  | 175 | ℃ |  | 1 |
| Storage temperature range | TSTG | -55 |  | 175 | ℃ |  | 1 |
| Breakdown voltage (SMBJ20CAQ, bi-directional) | VBR | 22.2 |  | 24.5 | V | IT = 1 mA (note 4: pulse test tp≤50ms) | 2 |
| Maximum reverse leakage (SMBJ20CAQ) | IR |  |  | 1 | μA | @ VRWM = 20.0 V | 2 |
| Maximum reverse surge current (SMBJ20CAQ) | IPP |  |  | 18.5 | A | Note 5: surge current waveform per Fig.3, derated per Fig.2 | 2 |
| Maximum clamping voltage (SMBJ20CAQ) | Vc |  |  | 32.4 | V | @ IPP | 2 |
| Thermal resistance, junction to lead (typical) | RθJL |  | 20 |  | ℃/W | junction to lead | 3 |
| Thermal resistance, junction to ambient (typical) | RθJA |  | 100 |  | ℃/W | junction to ambient | 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 | 3 |
| contacts |  | tin | ● Terminals: Matte tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `SMBJ20CAQ`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files: `smbj20caq-etched.step` / `smbj20caq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj20caq.step` / `smbj20caq.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/8603010903382380544) (6 pp, sha256 `70b580dd6a095884`, retrieved 2026-10-17, 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/smbj20caq-datasheet.pdf)