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1N4746APF-M

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ST(Semtech) Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1N4746APF-M

ST(Semtech) · Zener Diodes · DO-41

1N4746APF-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 terminal marked by the cathode band on the DO-41 glass case; it goes positive in zener (reverse) operation, and the part is rated 1 W Ptot with Tj max 175 °C.
2 A passive Anode, the terminal opposite the cathode band; forward voltage is max 1.2 V at IF = 200 mA.

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 Range VZ 17.1 18 18.9 V at IZT = 14 mA, tp = 20 ms, Ta = 25℃ 2
Zener Test Current IZT 14 mA Ta = 25℃ 2
Dynamic Resistance ZZT 20 Ω at IZT = 14 mA 2
Dynamic Resistance (knee) ZZK 750 Ω at IZK = 0.25 mA 2
Reverse Current IR 5 µA at VR = 13.7 V 2
Maximum Surge Current IZSM 250 mA 1/2 square wave or equivalent sine wave, 1/120 s, superimposed on IZT 2
Maximum Regulator Current IZM 50 mA leads at 8 mm from case kept at ambient temperature 2
Temperature Coefficient of Zener Voltage 0.06 0.09 %/°C printed as 0.06 to 0.09 2
Forward Voltage VF 1.2 V IF = 200 mA 2
Power Dissipation Ptot 1 W Ta = 25℃, leads at 8 mm from case kept at ambient temperature 1
Junction Temperature Tj 175 ℃ Ta = 25℃ 1
Storage Temperature Range Tstg -65 175 ℃ Ta = 25℃ 1
Thermal Resistance Junction to Ambient RθJA 150 ℃/W leads at 8 mm from case kept at ambient temperature 1

CAD (KiCad official)

  • Symbol: 1N4746APF-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 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (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