# KBU608

**Yangzhou Yangjie Elec Tech** · Bridge Rectifiers · KBU

KBU608 from Yangzhou Yangjie Elec Tech, 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, marked '-' on the body at the left-most lead in the outline drawing. |
| 2 | AC1 | passive | AC input terminal, marked AC on the body; the two AC leads are interchangeable, and the rated VRRM is 800 V for KBU608. |
| 3 | AC2 | passive | Second AC input terminal, marked AC on the body; the two AC leads are interchangeable, and the rated VRRM is 800 V for KBU608. |
| 4 | + | power_out | DC positive output of the bridge, marked '+' on the body at the right-most lead; average rectified output is 6 A with heatsink (Tc=105℃) or 2.5 A without heatsink (Ta=25℃). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Repetitive Peak Reverse Voltage (KBU608) | VRRM |  |  | 800 | V | KBU608 column | 1 |
| Average Rectified Output Current, with heatsink | IO |  |  | 6 | A | @60Hz sine wave, R-load, Tc=105℃ | 1 |
| Average Rectified Output Current, without heatsink | IO |  |  | 2.5 | A | @60Hz sine wave, R-load, Ta=25℃ | 1 |
| Surge (Non-repetitive) Forward Current | IFSM |  |  | 135 | A | @60Hz half-sine wave, 1 cycle, Ta=25℃ | 1 |
| Current Squared Time | I2t |  |  | 75 | A2S | Tj=25℃, rating per diode, 1ms≤t≤8.3ms | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Junction Temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Maximum instantaneous forward voltage drop per diode | VF |  |  | 1 | V | IFM=3A | 1 |
| Maximum DC reverse current at rated DC blocking voltage per diode | IRRM |  |  | 10 | μA | VRM=VRRM | 1 |
| Thermal resistance, junction to ambient, without heatsink | RθJ-A |  |  | 26 | ℃/W | Free air, no heat sink, P.C.B. at 0.375" (9.5mm) lead length with 0.5×0.5" (12×12mm) copper pads | 2 |
| Thermal resistance, junction to case, with heatsink | RθJ-C |  |  | 5 | ℃/W | Mounted on aluminum plate heat sink | 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 |  | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `KBU608`
- Footprint: `Diode_THT:Diode_Bridge_Vishay_KBU`
- 3D model: KBU (KiCad packages3D, STEP)
- 3D model files: `kbu608-etched.step` / `kbu608-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kbu608.step` / `kbu608.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/8588889660096958464) (4 pp, sha256 `87e08a50b7e2db84`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/kbu608-datasheet.pdf)