# MMSZ5258BS_R1_00001

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

MMSZ5258BS_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 | Cathode end of the zener diode, identified by the color band on the package; the datasheet rates the device at 200 mW power dissipation at TA=25°C (Note A) with a junction and storage range of -55 to +150°C. |
| 2 | Anode | passive | Anode end of the zener diode, the terminal opposite the color-banded cathode end. |

## 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal 36 V) | VZ | 34.2 | 36 | 37.8 | V | IZT = 3.4 mA | 2 |
| Max zener impedance at IZT | ZZT |  |  | 70 |  | IZT = 3.4 mA | 2 |
| Max zener impedance at IZK (knee) | ZZK |  |  | 700 |  | IZK = 0.25 mA | 2 |
| Max reverse leakage current | IR |  |  | 0.1 | A | VR = 27.0 V | 2 |
| Power dissipation | PD |  |  | 200 | mW | TA=25°C (Note A), mounted on 5 mm² land areas | 1 |
| Operating junction and storage temperature range | TJ | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `MMSZ5258BS_R1_00001`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `mmsz5258bs-r1-00001-etched.step` / `mmsz5258bs-r1-00001-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmsz5258bs-r1-00001.step` / `mmsz5258bs-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/8590237003716321280) (6 pp, sha256 `ada2667a4ef83908`, 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/mmsz5258bs-r1-00001-datasheet.pdf)