component

ZMM5231B

Public Made by Adom

by adom

MSKSEMI Zener Diodes, LL-34. 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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ZMM5231B

MSKSEMI · Zener Diodes · LL-34

ZMM5231B from MSKSEMI, in a LL-34. 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 MSKSEMI
Package LL-34
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 (nominal VZnom 5.1 V) VZT 4.85 5.1 5.35 V at IZT = 20 mA 3
Zener dynamic resistance ZZT 17 Ω at IZT = 20 mA 3
Zener dynamic resistance (knee) ZZK 1600 Ω at IZK = 0.25 mA 3
Reverse current IR 5 µA at VR = 2 V 3
Forward voltage VF 1.1 V at IF = 200 mA 2
Power dissipation Ptot 500 mW 2
Junction temperature Tj 175 °C 2
Storage temperature range Tstg -65 175 °C 2
Thermal resistance junction to ambient air RthA 0.3 K/mW 2

CAD (KiCad official)

  • Symbol: ZMM5231B
  • Footprint: Diode_SMD:D_MiniMELF
  • 3D model: LL-34 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: MSKSEMI datasheet (4 pp, sha256 eb00a46ecb047a44, retrieved 2026-10-21, tier: lcsc)
  • 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