# MMBD4448HTW

**Changjing** · Switching Diodes · SOT-363

MMBD4448HTW from Changjing, in a SOT-363. 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 | A1 | passive | Anode of diode 1, internally independent and paired with cathode pin 6; VRRM 80 V, IFM 500 mA. |
| 2 | A2 | passive | Anode of diode 2, internally independent and paired with cathode pin 5; VRRM 80 V, IFM 500 mA. |
| 3 | A3 | passive | Anode of diode 3, internally independent and paired with cathode pin 4; VRRM 80 V, IFM 500 mA. |
| 4 | K3 | passive | Cathode of diode 3, paired with anode pin 3; VRRM 80 V, IFM 500 mA. |
| 5 | K2 | passive | Cathode of diode 2, paired with anode pin 2; VRRM 80 V, IFM 500 mA. |
| 6 | K1 | passive | Cathode of diode 1, paired with anode pin 1; VRRM 80 V, IFM 500 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-363 |
| Category | Diodes |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `MMBD4448HTW`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `mmbd4448htw-etched.step` / `mmbd4448htw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbd4448htw.step` / `mmbd4448htw.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/8586202846114668544) (5 pp, sha256 `1b894fa0e5fbebce`, retrieved 2026-10-09, 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/mmbd4448htw-datasheet.pdf)