# MM5Z33

**CBI** · Zener Diodes · SOD-523

MM5Z33 from CBI, in a SOD-523. 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 terminal of the Zener diode; the datasheet states no separate electrical limit for this pin beyond the family ratings (Ptot 200 mW, Tj/Tstg -65 to +150 °C). |
| 2 | Anode | passive | Anode terminal of the Zener diode; the datasheet states no separate electrical limit for this pin beyond the family ratings (Ptot 200 mW, Tj/Tstg -65 to +150 °C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CBI |
| Package | SOD-523 |
| 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 | VZT | 31 | 33 | 35 | V | at IZT 2 mA | 2 |
| Forward voltage | VF |  |  | 0.9 | V | at IF = 10 mA | 1 |
| Total device dissipation | Ptot |  |  | 200 | mW |  | 1 |
| Junction and storage temperature range | Tj, Tstg | -65 |  | 150 | °C |  | 1 |
| Zener impedance | ZZT |  | 80 |  | Ω | at IZT 2 mA | 2 |
| Zener impedance (knee) | ZZK |  | 300 |  | Ω | at IZK 1 mA | 2 |
| Leakage current | IR |  | 0.1 |  | µA | at VR 25 V | 2 |

## CAD (KiCad official)

- Symbol: `MM5Z33`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `mm5z33-etched.step` / `mm5z33-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm5z33.step` / `mm5z33.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CBI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590184329671712768) (4 pp, sha256 `225495aedca309a9`, retrieved 2026-10-15, 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/mm5z33-datasheet.pdf)