component

MM3Z51VB

Public Made by Adom

by adom

onsemi Zener Diodes, SOD-323FL. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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MM3Z51VB

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm3z51vb.step / mm3z51vb.glb are 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, primary claude-sonnet-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