component
MM3Z12VB
Public Made by Adomby adom
onsemi Zener Diodes, SOD-323F. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMM3Z12VB
onsemi · Zener Diodes · SOD-323F
MM3Z12VB from onsemi, in a SOD-323F. 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, marked by the band on the SOD-323F package; the 12V (11.76V to 12.24V at 5mA) zener reference node, positive in reverse-bias regulation. |
| 2 | A | passive | Anode; forward voltage is 1.0V maximum at IF=10mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOD-323F |
| 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 | 11.76 | 12 | 12.24 | V | @ IZT = 5 mA, pulse 10mS, TA=25°C | 3 |
| Zener Impedance | ZZT | 23 | Ω | @ IZT = 5 mA | 3 | ||
| Zener Knee Impedance | ZZK | 141 | Ω | @ IZK = 1 mA | 3 | ||
| Reverse Leakage Current | IR | 0.09 | μA | @ VR = 8 V | 3 | ||
| Forward Voltage | VF | 1 | V | IF=10mA | 2 | ||
| Power Dissipation | PD | 200 | mW | TA = 25°C | 2 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | TA = 25°C | 2 | |
| Maximum Junction Temperature | TJ | 150 | °C | TA = 25°C | 2 | ||
| Thermal Resistance, Junction to Ambient | RθJA | 595 | °C/W | Device mounted on FR-4 PCB minimum land pad | 2 | ||
| Zener Voltage Tolerance (B Series) | -2 | 2 | % | standard tolerance on nominal zener voltage | 3 | ||
| Test Current | IZT | 5 | mA | VZ and ZZT test current | 3 | ||
| Knee Test Current | IZK | 1 | mA | ZZK test current | 3 |
CAD (KiCad official)
- Symbol:
MM3Z12VB - Footprint:
Diode_SMD:D_SOD-323F - 3D model: SOD-323F (KiCad packages3D, STEP)
- 3D model files:
mm3z12vb-etched.step/mm3z12vb-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm3z12vb.step/mm3z12vb.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
b0b591ddd5d0faf7, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).