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1SMA4729A SMA

Public Made by Adom

by adom

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

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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1SMA4729A SMA

XCH(旭昌辉) · IC · SMA

1SMA4729A SMA from XCH(旭昌辉), in a SMA. 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 terminal of the zener diode, at the banded end of the SMA body in the page 1 picture; the zener is operated reverse-biased with this pin positive, and power dissipation is max 1 W at Tc=75°C.
2 A passive Anode terminal of the zener diode, at the unbanded end of the 2-lead SMA package; forward voltage is 1.2 V at IF = 200 mA.

Key specifications

Parameter Value
Manufacturer XCH(旭昌辉)
Package SMA
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 (nominal 3.6 V) VZT 3.4 3.6 3.8 V at IZT 69 mA; VZT tested with pulses (20 ms) 2
Dynamic impedance ZZT 10 Ω at IZT 69 mA 2
Reverse current IR 100 µA at VR 1 V 2
Forward voltage VF 1.2 V at IF = 200 mA 1
Power dissipation PD 1 W at Tc = 75°C 1
Junction temperature range TJ -55 150 °C 1
Storage temperature range TS -55 150 °C 1

CAD (KiCad official)

  • Symbol: 1SMA4729A SMA
  • Footprint: Diode_SMD:D_SMA
  • 3D model: SMA (KiCad packages3D, STEP)
  • 3D model files: 1sma4729a-sma-etched.step / 1sma4729a-sma-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma4729a-sma.step / 1sma4729a-sma.glb are the bare package body.

Provenance

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

  • Datasheet: XCH(旭昌辉) datasheet (3 pp, sha256 8898909dec2ee3ad, 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