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1N4733APF-M

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ST(Semtech) Zener Diodes, DO-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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1N4733APF-M

ST(Semtech) · Zener Diodes · DO-41

1N4733APF-M from ST(Semtech), in a DO-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 DO-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 (nominal 5.1 V) at IZT VZT 4.84 5.1 5.36 V at IZT = 49 mA; pulses tp = 20 ms 2
Dynamic resistance at IZT ZZT 7 Ω at IZT = 49 mA; 60 Hz AC at 10% of IZT 2
Dynamic resistance at IZK ZZK 550 Ω at IZK = 1 mA 2
Reverse current IR 10 µA at VR = 1 V 2
Maximum surge current IZSM 890 mA peak non-repetitive reverse surge, 1/2 square wave or sine pulse 1/120 s, superimposed on IZT 2
Maximum regulator current IZM 178 mA leads at 8 mm from case kept at ambient temperature 2
Temperature coefficient -0.01 0.04 %/°C as printed for 1N4733APF 2
Forward voltage VF 1.2 V at IF = 200 mA 2
Power dissipation Ptot 1 W leads at 8 mm from case kept at ambient temperature 1
Junction temperature Tj 175 ℃ 1
Storage temperature range Tstg -65 175 ℃ 1
Thermal resistance junction to ambient RθJA 150 ℃/W leads at 8 mm from case kept at ambient temperature 1

CAD (KiCad official)

  • Symbol: 1N4733APF-M
  • Footprint: Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal
  • 3D model: DO-41 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: ST(Semtech) datasheet (3 pp, sha256 75f805f187583a3f, 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