# KBU6B-E4

**Vishay Intertech** · Bridge Rectifiers · KBU

KBU6B-E4 from Vishay Intertech, in a KBU. 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 | DC negative output of the bridge rectifier, marked '-' on the body, leftmost lead in the package drawing. |
| 2 | 2 | passive | AC input terminal of the bridge, marked '~' on the body; VRMS rating for KBU6B is 70 V. |
| 3 | 3 | passive | Second AC input terminal of the bridge, marked '~' on the body; interchangeable with the other '~' pin. |
| 4 | + | power_out | DC positive output of the bridge rectifier, marked '+' on the body, longest lead in the drawing; average rectified current 6.0 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | KBU |
| 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 |  |  | 100 | V |  | 1 |
| Maximum RMS voltage | VRMS |  |  | 70 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 100 | V |  | 1 |
| Maximum average forward rectified output current | IF(AV) |  |  | 6 | A | TC = 100 °C (1)(3) | 1 |
| Peak forward surge current | IFSM |  |  | 250 | A | Single sine-wave superimposed on rated load | 1 |
| Operating junction and storage temperature range | TJ, TSTG | -50 |  | 150 | °C |  | 1 |
| Maximum instantaneous forward drop per diode | VF |  |  | 1 | V | IF = 6.0 A | 1 |
| Maximum DC reverse current at rated DC blocking voltage per diode | IR |  |  | 5 | μA | TA = 25 °C | 1 |
| Maximum DC reverse current at rated DC blocking voltage per diode | IR |  |  | 1 | mA | TA = 125 °C | 1 |
| Typical thermal resistance, junction to ambient | RθJA |  | 8.6 |  | °C/W | Junction to ambient, free air, PCB mounted on 0.5 in x 0.5 in (12 mm x 12 mm) copper pads, 0.375 in (9.5 mm) lead length | 2 |
| Typical thermal resistance, junction to case | RθJC |  | 3.1 |  | °C/W | Junction to case, mounted on 2.6 in x 1.4 in x 0.06 in (6.5 cm x 3.5 cm x 0.15 cm) aluminum plate | 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 |
|---|---|---|---|---|
| contacts |  | silver | Terminals: silver plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `KBU6B-E4`
- Footprint: `Diode_THT:Diode_Bridge_Vishay_KBU`
- 3D model: KBU (KiCad packages3D, STEP)
- 3D model files: `kbu6b-e4-etched.step` / `kbu6b-e4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kbu6b-e4.step` / `kbu6b-e4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Vishay Intertech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590230608379994112) (4 pp, sha256 `026de38bb51c8ead`, retrieved 2026-10-16, 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/kbu6b-e4-datasheet.pdf)