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ZM4747A

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by adom

EIC Semicon Zener Diodes, MELF. 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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ZM4747A

EIC Semicon · Zener Diodes · MELF

ZM4747A from EIC Semicon, in a MELF. 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 EIC Semicon
Package MELF
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 (standard, nominal VZ) -5 5 % Standard tolerance on nominal zener voltage; type number carries ±5% (Note 3) 2
Maximum DC zener current IZM 45 mA Note (2): electrodes at 10 mm from case kept at ambient temperature 2
Maximum zener impedance ZZT 22 Ω @ IZT = 12.5 mA 2
Maximum zener impedance (knee) ZZK 750 Ω @ IZK = 0.25 mA 2
Maximum reverse leakage current IR 5 μA @ VR = 15.2 V 2
Maximum forward voltage VF 1.2 V @ IF = 200 mA 1
Power dissipation PD 1 W Note (1): valid provided electrodes are kept at ambient temperature 1
Thermal resistance junction to ambient air RθJA 170 °C/W Note (1): valid provided electrodes are kept at ambient temperature 1
Junction temperature TJ -65 200 °C 1
Storage temperature range TS -65 200 °C 1
Nominal zener voltage VZ 20 V @ IZT = 12.5 mA 2

CAD (KiCad official)

  • Symbol: ZM4747A
  • Footprint: Diode_SMD:D_MELF
  • 3D model: MELF (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: EIC Semicon datasheet (2 pp, sha256 bfe11882515920ca, 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