# MURS320B

**Yangzhou Yangjie Elec Tech** · Fast Recovery / High Efficiency Diodes · SMB(DO-214AA)

MURS320B from Yangzhou Yangjie Elec Tech, in a SMB(DO-214AA). 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SMB(DO-214AA) |
| Category | Diodes |
| Pins | 2 |

## 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 |  | 1 |
| Average rectified output current | IO |  |  | 3 | A | @60Hz sine wave, resistance load, TL (Fig.1) | 1 |
| Surge (non-repetitive) forward current | IFSM |  |  | 100 | A | @60Hz half-sine wave, 1 cycle, Ta=25℃ | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Junction temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Maximum instantaneous forward voltage drop per diode | VF |  |  | 0.92 | V | IFM=3.0A | 1 |
| Maximum reverse recovery time | trr |  |  | 35 | ns | IF=0.5A, IR=1.0A, Irr=0.25A | 1 |
| Maximum DC reverse current at rated DC blocking voltage per diode, Ta=25℃ | IRRM |  |  | 5 | μA | @ VRM=VRRM, Ta=25℃ | 1 |
| Maximum DC reverse current at rated DC blocking voltage per diode, Ta=125℃ | IRRM |  |  | 50 | μA | @ VRM=VRRM, Ta=125℃ | 1 |
| Typical thermal resistance, junction to ambient | RθJ-A |  | 60 |  | ℃/W | Junction to ambient, mounted on P.C.B. with 0.3" x 0.3" (8.0 mm x 8.0 mm) copper pad areas | 2 |
| Typical thermal resistance, junction to lead | RθJ-L |  | 20 |  | ℃/W | Junction to lead, mounted on P.C.B. with 0.3" x 0.3" (8.0 mm x 8.0 mm) copper pad areas | 2 |

## CAD (KiCad official)

- Symbol: `MURS320B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `murs320b-etched.step` / `murs320b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `murs320b.step` / `murs320b.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/8590218912752033792) (5 pp, sha256 `f9618ab676fa91a5`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/murs320b-datasheet.pdf)