# MMSZ5241C

**amsem** · Zener Diodes · SOD-123

MMSZ5241C from amsem, in a SOD-123. 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 end marked with the cathode band; MMSZ5241C has Vz 11 V nominal (10.78 to 11.22 V) at IZT = 20 mA and 350 mW maximum power dissipation. |
| 2 | A | passive | Anode, the end without the cathode band; the diode symbol on page 1 shows it opposite the cathode, and the Zener conducts in reverse from cathode to anode at Vz. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | amsem |
| Package | SOD-123 |
| 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 (Nom 11 V, Min 10.78 V, Max 11.22 V) | Vz | 10.78 | 11 | 11.22 | V | @IZT = 20 mA; *1 pulse width = 10 ms | 2 |
| Power Dissipation | PD |  |  | 350 | mW | Ta = 25 ℃ | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ | Ta = 25 ℃ | 1 |
| Storage Temperature | TSTG | -55 |  | 125 | ℃ | Ta = 25 ℃ | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | ◇ Matte Tin (Sn) Lead finish ◇ Cathode Band / Device marking | 1 |

## CAD (KiCad official)

- Symbol: `MMSZ5241C`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `mmsz5241c-etched.step` / `mmsz5241c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmsz5241c.step` / `mmsz5241c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [amsem datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602912215985381376) (3 pp, sha256 `4a7b1ef1bde5b266`, retrieved 2026-10-17, 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/mmsz5241c-datasheet.pdf)