component

ZM4757APF

Public Made by Adom

by adom

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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ZM4757APF

ST(Semtech) · Zener Diodes · LL-41

ZM4757APF 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 Range VZ 48.45 51 53.55 V at IZT = 5 mA, Tested with pulses tp = 20 ms 2
Dynamic Resistance ZZT 95 Ω at IZT = 5 mA 2
Dynamic Resistance (knee) ZZK 1500 Ω at IZK = 0.25 mA 2
Reverse Current IR 5 µA at VR = 38.8 V 2
Maximum Surge Current IZSM 90 mA 2
Maximum Regulator Current IZM 18 mA leads at 8 mm from case kept at ambient temperature 2
Forward Voltage VF 1.2 V IF = 200 mA 2
Power Dissipation Ptot 1 W Ta = 25℃ 1
Operating Junction Temperature Tj 200 ℃ Ta = 25℃ 1
Storage Temperature Range Tstg -65 200 ℃ Ta = 25℃ 1
Thermal Resistance Junction to Ambient RθJA 175 ℃/W leads at a distance of 8 mm from case kept at ambient temperature 1

CAD (KiCad official)

  • Symbol: ZM4757APF
  • 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 f0765299dc46f5e5, retrieved 2026-10-22, 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