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ZMM5258B

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JSMSEMI Zener Diodes, MiniMELF. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ZMM5258B

JSMSEMI · Zener Diodes · MiniMELF

ZMM5258B from JSMSEMI, in a MiniMELF. 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 end marked with the color band; the zener voltage for ZMM5258B is 36 V nominal at IZT = 3.4 mA with a 0.5 W (Ptot) rating.
2 A passive Anode, the end opposite the color band; the forward voltage is 1.1 V maximum at IF = 200 mA.

Key specifications

Parameter Value
Manufacturer JSMSEMI
Package MiniMELF
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
Nominal zener voltage VZ 36 V @ IZT 2
Zener test current IZT 3.4 mA 2
Maximum zener impedance ZZT 70 Ω @ IZT 2
Maximum zener impedance (knee) ZZK 700 Ω @ IZK 2
Typical temperature coefficient of zener voltage αVZ 0.093 %/°C 2
Maximum reverse leakage current IR 0.1 µA @ VR = 27 V 2
Reverse voltage for leakage test VR 27 V 2
Maximum DC zener current IZM 12.6 mA 2
Forward voltage VF 1.1 V IF=200mA 1
Power dissipation Ptot 500 mW Tamb=75°C (Note 1) 1
Thermal resistance junction to ambient RθJA 300 K/W Note 1 1
Junction temperature TJ 175 °C 1
Storage temperature range TSTG -55 175 °C 1

CAD (KiCad official)

  • Symbol: ZMM5258B
  • Footprint: Diode_SMD:D_MiniMELF
  • 3D model: MiniMELF (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: JSMSEMI datasheet (3 pp, sha256 89f66f59e02dfcfe, retrieved 2026-10-23, tier: lcsc)
  • 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