# SMB3Z82A

**XCH(旭昌辉)** · IC · SMB

SMB3Z82A from XCH(旭昌辉), in a 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, marked by the color band; for the 82 V part it goes positive in reverse (Zener) operation, with VZ 77.90 to 86.10 V at IZT 9.1 mA and max DC Zener current 33 mA. |
| 2 | A | passive | Anode, the end opposite the color band; forward voltage max 1.2 V at 200 mA, with power dissipation 3.0 W at TL = 75 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | SMB |
| Category |  |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage | VZ | 77.9 | 82 | 86.1 | V | @ IZT = 9.1 mA | 3 |
| Maximum zener impedance | ZZT |  |  | 95 | Ω | @ IZT = 9.1 mA | 3 |
| Maximum zener impedance | ZZK |  |  | 3000 | Ω | @ IZK = 0.25 mA | 3 |
| Maximum reverse leakage current | IR |  |  | 0.5 | µA | @ VR = 62.2 V | 3 |
| Maximum DC zener current | IZM |  |  | 33 | mA |  | 3 |
| Maximum forward voltage | VF |  |  | 1.2 | V | at IF = 200mA | 1 |
| DC power dissipation | PD |  |  | 3 | W | at TL = 75 °C (note 1) | 1 |
| Junction temperature range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Storage temperature range | TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `SMB3Z82A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `smb3z82a-etched.step` / `smb3z82a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smb3z82a.step` / `smb3z82a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XCH(旭昌辉) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603109743259377664) (3 pp, sha256 `f7084c044e53fbe6`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/smb3z82a-datasheet.pdf)