# GBU406

**MDD Microdiode Semiconductor** · Bridge Rectifiers · GBU

GBU406 from MDD Microdiode Semiconductor, in a GBU. 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 | + | passive | Positive DC output of the bridge; GBU406 is rated 600 V VRRM and 4.0 A average rectified current. |
| 2 | 2 | passive | AC input terminal; GBU406 is rated 420 V RMS maximum. |
| 3 | 3 | passive | AC input terminal; GBU406 is rated 420 V RMS maximum. |
| 4 | - | passive | Negative DC output of the bridge; GBU406 is rated 600 V DC blocking voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| Package | GBU |
| Category | Diodes |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `GBU406`
- Footprint: `Diode_THT:Diode_Bridge_Vishay_GBU`
- 3D model: GBU (KiCad packages3D, STEP)
- 3D model files: `gbu406-etched.step` / `gbu406-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gbu406.step` / `gbu406.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MDD Microdiode Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895537974693888) (2 pp, sha256 `5b62496b6b8c762d`, retrieved 2026-10-13, 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/gbu406-datasheet.pdf)