# M4

**hongjiacheng** · Diodes - General Purpose · SMA(DO-214AC)

M4 from hongjiacheng, in a SMA(DO-214AC). 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 | K | passive | Cathode terminal, the end marked with the cathode line; the M4 blocks 400 V repetitive peak reverse (280 V RMS) and passes 1.0 A average forward current. |
| 2 | A | passive | Anode terminal at the end opposite the cathode line; the M4 has a maximum forward voltage of 1.0 V at IF=1.0 A and a 30.0 A non-repetitive peak surge rating (8.3 ms half-sine). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | SMA(DO-214AC) |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `M4`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `m4-etched.step` / `m4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `m4.step` / `m4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755885124884287488) (3 pp, sha256 `0f6ad782a23a225b`, retrieved 2026-10-12, 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/m4-datasheet.pdf)