# KBL402

**Changjing** · Bridge Rectifiers · KBL

KBL402 from Changjing, 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 | + | passive | Positive DC output of the bridge (cathodes of the diodes), the leftmost and longer lead in the KBL outline, for a 4A average rectified output (Tc=40℃). |
| 2 | 2 | passive | AC input terminal of the bridge, rated for repetitive peak reverse voltage up to 1000V depending on grade (KBL404 = 400V). |
| 3 | 3 | passive | Second AC input terminal of the bridge, rated for repetitive peak reverse voltage up to 1000V depending on grade (KBL404 = 400V). |
| 4 | - | passive | Negative DC output of the bridge (anodes of the diodes), the rightmost lead, with 125A non-repetitive surge forward current (60Hz, 1 cycle). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 |
|---|---|---|---|---|---|---|---|
| Repetitive Peak Reverse Voltage | VRRM |  |  | 200 | V | KBL402 column (02); table lists 50 to 1000 V across variants | 1 |
| Average Rectified Output Current | IO |  |  | 4 | A | 60Hz sine wave, R-load Tc=40℃ | 1 |
| Surge (Non-repetitive) Forward Current | IFSM |  |  | 125 | A | 60HZ sine wave, 1 cycle, Tj=25℃ | 1 |
| Current Squared Time | I2t |  |  | 93 | A2S | 1ms≤t<8.3ms Tj=25℃, Rating of per diode | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Junction Temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Peak Forward Voltage | VFM |  |  | 1.1 | V | IFM=4.0A, Pulse measurement, Rating of per diode | 1 |
| Peak Reverse Current | IRRM |  |  | 10 | μA | VRM=VRRM, Pulse measurement, Rating of per diode | 1 |

## CAD (KiCad official)

- Symbol: `KBL402`
- Footprint: `Diode_THT:Diode_Bridge_Vishay_KBL`
- 3D model: KBL (KiCad packages3D, STEP)
- 3D model files: `kbl402-etched.step` / `kbl402-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kbl402.step` / `kbl402.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603165046537273344) (3 pp, sha256 `3db5e0e61bfeb54c`, 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/kbl402-datasheet.pdf)