component
MM3Z51VB
Public Made by Adomby adom
onsemi Zener Diodes, SOD-323FL. 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
markdownMM3Z51VB
onsemi · Zener Diodes · SOD-323FL
MM3Z51VB 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 | K | passive | Cathode, marked by the band on the package; Zener voltage VZ is 49.98 V min, 51 V typ, 52.02 V max at IZT = 2 mA (MM3Z51VB). |
| 2 | A | passive | Anode; forward voltage VF is 1.0 V max at IF = 10 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 | 49.98 | 51 | 52.02 | V | IZT = 2 mA, TA = 25°C, pulse 10 ms | 2 |
| Zener Voltage Tolerance | VZ | -2 | 2 | % | B Series, nominal Zener voltage | 2 | |
| Zener Impedance | ZZT | 169 | Ω | IZT = 2 mA | 2 | ||
| Zener Impedance (knee) | ZZK | 376 | Ω | IZK = 0.5 mA | 2 | ||
| Reverse Current | IR | 0.045 | µA | VR = 35.7 V | 2 | ||
| Forward Voltage | VF | 1 | V | IF = 10 mA | 1 | ||
| Power Dissipation | PD | 200 | mW | TA = 25°C | 1 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 1 | ||
| Maximum Junction Temperature | TJ | 150 | °C | 1 | |||
| Thermal Resistance, Junction to Ambient | RθJA | 595 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
MM3Z51VB - Footprint:
Diode_SMD:D_SOD-323F - 3D model: SOD-323FL (KiCad packages3D, STEP)
- 3D model files:
mm3z51vb-etched.step/mm3z51vb-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm3z51vb.step/mm3z51vb.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (7 pp, sha256
35648400ecaafb92, retrieved 2026-10-23, 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).