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ZM4744A

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ST(Semtech) 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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ZM4744A

ST(Semtech) · Zener Diodes · LL-41

ZM4744A from ST(Semtech), 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 ST(Semtech)
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
Zener voltage ZM4744 (nominal, as printed) VZnom 15 V at IZT 17 mA 2
Zener voltage tolerance (suffix A) -5 5 % suffix A = ±5%; standard ±10% 1
Dynamic resistance ZZT 14 Ω at IZT 17 mA 2
Dynamic resistance ZZK 700 Ω at IZK 0.25 mA 2
Reverse current IR 5 µA at VR 11.4 V 2
Maximum surge current IZSM 304 mA 1/2 square wave or sine pulse, 1/120 s, superimposed on IZT 2
Maximum regulator current IZM 61 mA Ta = 25℃; valid provided electrodes kept at ambient temperature 2
Forward voltage VF 1.2 V at IF 200 mA 1
Power dissipation Ptot 1 W Valid provided that 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 that electrodes are kept at ambient temperature 1

CAD (KiCad official)

  • Symbol: ZM4744A
  • Footprint: Diode_SMD:D_MELF
  • 3D model: LL-41 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: ST(Semtech) datasheet (3 pp, sha256 ff41c4dbf24547f7, retrieved 2026-10-21, 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