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1N4747A

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Taiwan Semiconductor Zener Diodes, DO-204AL(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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1N4747A

Taiwan Semiconductor · Zener Diodes · DO-204AL(DO-41)

1N4747A from Taiwan Semiconductor, in a DO-204AL(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 Taiwan Semiconductor
Package DO-204AL(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 20 V) VZ 19 20 21 V @ IZT = 12.5 mA 2
Zener voltage tolerance (A suffix) -5 5 % A suffix, standard ±5% (Note 1) 3
Zener impedance ZZT 22 Ω @ IZT = 12.5 mA, 60 Hz AC at 10% of IZT (Note 4) 2
Zener impedance at knee ZZK 750 Ω @ IZK = 0.25 mA 2
Leakage current IR 5 μA @ VR = 15.2 V 2
Power dissipation Ptot 1 W @ TA = 50°C 1
Derating above 50°C 6.67 mW/°C Above 50°C, mounted on Cu-pad 5mm x 5mm (Note 1) 1
Operating junction temperature range TJ -55 150 °C 1
Storage temperature range TSTG -55 150 °C 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin ● Terminal: Pure tin plated leads, solderable per J-STD-002 ● Meet JESD 201 class 2 whisker test 1

CAD (KiCad official)

  • Symbol: 1N4747A
  • Footprint: Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal
  • 3D model: DO-204AL(DO-41) (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Taiwan Semiconductor datasheet (8 pp, sha256 95c7c95b89d1d4ac, retrieved 2026-10-16, 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