# KBL406

**MDD（Microdiode Electronics）** · Bridge Rectifiers · KBL

KBL406 from MDD（Microdiode Electronics）, in a KBL. 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 | + | power_out | Positive DC output of the bridge; rectified output rated 4.0 A average at TA=50°C. |
| 2 | AC1 | passive | AC input terminal (~); KBL406 is rated 600 V VRRM and 420 V VRMS. |
| 3 | AC2 | passive | AC input terminal (~); KBL406 is rated 600 V VRRM and 420 V VRMS. |
| 4 | - | power_out | Negative DC output of the bridge (return); peak forward surge current 200 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD（Microdiode Electronics） |
| Package | KBL |
| Category | Diodes |
| Pins | 4 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum repetitive peak reverse voltage | VRRM |  |  | 600 | V |  | 1 |
| Maximum RMS voltage | VRMS |  |  | 420 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 600 | V |  | 1 |
| Maximum average forward output rectified current | I(AV) |  |  | 4 | A | at TA=50°C | 1 |
| Peak forward surge current | IFSM |  |  | 200 | A | 8.3ms single half sine-wave superimposed on rated load (JEDEC Method) | 1 |
| Rating for fusing | I2t |  |  | 166 | A2s | t<8.3ms | 1 |
| Maximum instantaneous forward voltage drop | VF |  |  | 1.1 | V | per bridge element at 4.0A | 1 |
| Maximum DC reverse current | IR |  |  | 10 | μA | TA=25°C at rated DC blocking voltage | 1 |
| Maximum DC reverse current | IR |  |  | 1 | mA | TA=100°C at rated DC blocking voltage | 1 |
| Typical junction capacitance | CJ |  | 105 |  | pF |  | 1 |
| Typical thermal resistance (junction to ambient) | RθJA |  | 10 |  | °C/W | Thermal resistance from junction to ambient on P.C. board mounting (Note 1) | 1 |
| Operating junction temperature range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage temperature range | TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `KBL406`
- Footprint: `Diode_THT:Diode_Bridge_Vishay_KBL`
- 3D model: KBL (KiCad packages3D, STEP)
- 3D model files: `kbl406-etched.step` / `kbl406-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kbl406.step` / `kbl406.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MDD（Microdiode Electronics） datasheet](docs/kbl406-datasheet.pdf) (2 pp, sha256 `573c5f78e440cb38`, retrieved 2026-10-21, 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/kbl406-datasheet.pdf)