# SMDJ26CAQ

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

SMDJ26CAQ 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 (bi-directional, SMDJ26CA) | VBR | 28.9 |  | 31.9 | V | IT=1 mA (note 4: pulse test tp≤50ms) | 2 |
| Maximum reverse leakage current | IR |  |  | 1 | μA | @ VRWM = 26 V | 2 |
| Maximum reverse surge current | IPP |  |  | 71.26 | A | Surge current per Fig.3, derated per Fig.2 (note 6) | 2 |
| Maximum clamping voltage | VC |  |  | 42.1 | V | @ IPP | 2 |
| Working peak reverse voltage | VRWM |  | 26 |  | V |  | 2 |
| Peak power dissipation | PPPM |  |  | 3000 | W | 10/1000 µs waveform (notes 1, 2; Fig.1) | 1 |
| Power dissipation | PD |  |  | 6.5 | W | On infinite heat sink at TL=75℃ (note 2) | 1 |
| Operating junction temperature | TJ | -55 |  | 175 | ℃ |  | 1 |
| Storage temperature range | TSTG | -55 |  | 175 | ℃ |  | 1 |
| Thermal resistance, junction to ambient (typical) | RθJA |  | 75 |  | ℃/W | Junction to ambient | 2 |
| Thermal resistance, junction to lead (typical) | RθJL |  | 15 |  | ℃/W | Junction to lead | 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 |
|---|---|---|---|---|
| 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: `SMDJ26CAQ`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files: `smdj26caq-etched.step` / `smdj26caq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smdj26caq.step` / `smdj26caq.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/8603095678919069696) (5 pp, sha256 `f699c92f072cb9bb`, retrieved 2026-10-18, 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/smdj26caq-datasheet.pdf)