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1N4731A

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XCH(旭昌辉) , DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1N4731A

XCH(旭昌辉) · IC · DO-41

1N4731A from XCH(旭昌辉), 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 end marked by the color band; for a Zener it goes to the positive side in reverse breakdown (VZ 4.3 V nominal, 4.09 to 4.52 V at IZT = 58 mA).
2 A passive Anode, the lead at the end without the color band; maximum forward voltage 1.2 V at IF = 200 mA.

Key specifications

Parameter Value
Manufacturer XCH(旭昌辉)
Package DO-41
Category
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 VZ 4.09 4.3 4.52 V @IZT 9.0 mA 3
Maximum Zener impedance ZZT 58 Ω @IZT 9.0 mA 3
Maximum Zener impedance ZZK 400 Ω @IZK 1.00 mA 3
Maximum reverse leakage current IR 10 uA @VR 1.0 V 3
Maximum DC Zener current IZM 210 mA 3
Maximum forward voltage VF 1.2 V at IF=200mA 1
Storage temperature range TJ，TSTG -55 150 ℃ 1
Junction temperature range TJ，TSTG -55 150 ℃ 1
DC power dissipation PD 1 W TL = 75 °C, lead temperature at 3/8'' (9.5mm) from body 1

CAD (KiCad official)

  • Symbol: 1N4731A
  • 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: XCH(旭昌辉) datasheet (3 pp, sha256 d1c9cb277508fa39, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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