# MMSZ5250BS_R1_00001

**PANJIT International** · Zener Diodes · SOD-323

MMSZ5250BS_R1_00001 from PANJIT International, in a SOD-323. 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 | Cathode | passive | The cathode is the end marked by the color band on the SOD-323 package, per the datasheet's polarity note. |
| 2 | Anode | passive | The anode is the unbanded end of the SOD-323 package opposite the cathode band, and the datasheet gives no separate electrical limit for this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PANJIT International |
| Package | SOD-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Zener voltage VZ (Nom. 20 V; min 19.00 V, max 21.00 V) | VZ | 19 | 20 | 21 | V | @ IZT 25 mA | 2 |
| Max. Zener impedance ZZT | ZZT |  |  | 6.2 | Ω | @ IZT 25 mA | 2 |
| Max. Zener impedance ZZK | ZZK |  |  | 600 | Ω | @ IZK 0.25 mA | 2 |
| Max. reverse leakage current IR | IR |  |  | 0.1 | uA | @ VR 15.0 V | 2 |
| Power dissipation PD | PD |  |  | 200 | mW | @ TA=25°C (Note A) | 1 |
| Operating junction and storage temperature range TJ | TJ | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `MMSZ5250BS_R1_00001`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `mmsz5250bs-r1-00001-etched.step` / `mmsz5250bs-r1-00001-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmsz5250bs-r1-00001.step` / `mmsz5250bs-r1-00001.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PANJIT International datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918465662472192) (6 pp, sha256 `1e63c54ca6243b4a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/mmsz5250bs-r1-00001-datasheet.pdf)