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MMSZ5254B-E3-08

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Vishay Intertech Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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MMSZ5254B-E3-08

Vishay Intertech · Zener Diodes · SOD-123

MMSZ5254B-E3-08 from Vishay Intertech, in a SOD-123. 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer Vishay Intertech
Package SOD-123
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 tolerance (B suffix) VZ -5 5 % Standard tolerance with B suffix 1
Power dissipation Ptot 500 mW TL = 75 °C, on FR-4 or FR-5 board with minimum recommended solder pad layout 1
Thermal resistance junction to ambient air RthJA 340 K/W On FR-4 or FR-5 board with minimum recommended solder pad layout 1
Junction temperature Tj 150 °C 1
Storage temperature range Tstg -65 150 °C 1
Operating temperature range Top -55 150 °C 1
Reverse leakage current IR 0.1 μA VR = 21 V 2
Dynamic resistance ZZ 41 Ω at IZT1 = 4.6 mA 2
Dynamic resistance (knee) ZZK 600 Ω at IZT2 = 0.25 mA 2
Forward voltage VF 0.9 V IF = 10 mA 2
Nominal Zener voltage VZ 27 V at IZT1 = 4.6 mA, thermal equilibrium 2
Test current IZT1 4.6 mA 2
Test current (knee) IZT2 0.25 mA 2
Temperature coefficient of Zener voltage VZ 0.09 %/°C at IZT1 2

CAD (KiCad official)

  • Symbol: MMSZ5254B-E3-08
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mmsz5254b-e3-08-etched.step / mmsz5254b-e3-08-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5254b-e3-08.step / mmsz5254b-e3-08.glb are the bare package body.

Provenance

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

  • Datasheet: Vishay Intertech datasheet (5 pp, sha256 1daa13f96351d794, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (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