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ZM4737A

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Slkor(SLKORMICRO Elec.) Zener Diodes, LL-41. 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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ZM4737A

Slkor(SLKORMICRO Elec.) · Zener Diodes · LL-41

ZM4737A from Slkor(SLKORMICRO Elec.), in a LL-41. 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 Slkor(SLKORMICRO Elec.)
Package LL-41
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
Power Dissipation Ptot 1 W Valid provided electrodes are kept at ambient temperature 1
Junction Temperature Tj 175 ℃ 1
Storage Temperature Range Tstg -65 175 ℃ 1
Thermal Resistance Junction to Ambient Air RθJA 170 K/W Valid provided electrodes are kept at ambient temperature 1
Zener Voltage Tolerance (suffix A, ±5%) VZnom -5 5 % Suffix A denotes ±5% Zener voltage tolerance 1
Dynamic Resistance ZZT 4 Ω At IZT = 34 mA; 60 Hz AC at 10% of IZT RMS 2
Dynamic Resistance (knee) ZZK 700 Ω At IZK = 0.5 mA 2
Reverse Current IR 10 µA At VR = 5 V 2
Maximum Surge Current IZSM 605 mA Peak non-repetitive reverse surge, 1/2 square wave or sine pulse of 1/120 s superimposed on IZT 2
Maximum Regulator Current IZM 121 mA Valid provided electrodes are kept at ambient temperature 2
Forward Voltage VF 1.2 V At IF = 200 mA 1
Nominal Zener Voltage VZnom 7.5 V At IZT = 34 mA 2

CAD (KiCad official)

  • Symbol: ZM4737A
  • Footprint: Diode_SMD:D_MELF
  • 3D model: LL-41 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Slkor(SLKORMICRO Elec.) datasheet (3 pp, sha256 ea3e3b30191fadbe, 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