# MM3Z33VC

**onsemi** · Zener Diodes · SOD-323FL

MM3Z33VC from onsemi, in a SOD-323FL. 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 | ANODE | passive | Anode terminal of the zener diode, shown as pin 1 in the connection diagram; the cathode is the banded end of the package. |
| 2 | CATHODE | passive | Cathode terminal, the banded end of the package, shown as pin 2 in the connection diagram; for MM3Z33VC the nominal zener voltage is 33 V (31.35 V to 34.65 V) at IZT = 2 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOD-323FL |
| 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 (VZ) tolerance, C series | VZ | -5 |  | 5 | % | Standard tolerance on nominal zener voltage (footnote 2) | 2 |
| Zener voltage | VZ | 31.35 | 33 | 34.65 | V | @ IZT = 2 mA; VZ tested as 10 ms pulse (footnote 1) | 2 |
| Zener impedance at IZT | ZZT |  |  | 75 | ohms | @ IZT = 2 mA | 2 |
| Zener impedance at IZK | ZZK |  |  | 306 | ohms | @ IZK = 0.5 mA | 2 |
| Reverse current | IR |  |  | 0.045 | A | @ VR = 23 V | 2 |
| Forward voltage | VF |  |  | 1 | V | IF = 10 mA | 1 |
| Power dissipation | PD |  |  | 200 | mW | TA = 25°C unless otherwise noted | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | °C |  | 1 |
| Maximum junction temperature | TJ |  |  | 150 | °C |  | 1 |
| Thermal resistance, junction to ambient | RJA |  | 595 |  | °C/W | Device mounted on PCB with minimum land pad | 1 |

## CAD (KiCad official)

- Symbol: `MM3Z33VC`
- Footprint: `Diode_SMD:D_SOD-323F`
- 3D model: SOD-323FL (KiCad packages3D, STEP)
- 3D model files: `mm3z33vc-etched.step` / `mm3z33vc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm3z33vc.step` / `mm3z33vc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589990313147740160) (6 pp, sha256 `117bb783d3db4c57`, retrieved 2026-10-13, 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/mm3z33vc-datasheet.pdf)