component

1SMA4742A

Public Made by Adom

by adom

MDD（Microdiode Electronics） Zener Diodes, SMA(DO-214AC). 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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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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1SMA4742A

MDD（Microdiode Electronics） · Zener Diodes · SMA(DO-214AC)

1SMA4742A from MDD（Microdiode Electronics）, in a SMA(DO-214AC). 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 MDD（Microdiode Electronics）
Package SMA(DO-214AC)
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 (min, nom, max) VZT 11.4 12 12.6 V at IZT (21 mA); VZT tested with 20 ms pulses 2
Dynamic impedance, max ZZT 9 Ω at IZT (21 mA) 2
Admissible Zener current, max IZM 79 mA 2
Forward voltage VF 1.2 V 1
Peak power dissipation PD 1 W TA=50°C, mounted on 5.0 mm² land areas (Note 1) 1
Power derating above 50°C PD 6.67 mW/°C derate above 50°C 1
Operating junction temperature range TJ -55 150 °C 1
Storage temperature range TSTG -55 150 °C 1

CAD (KiCad official)

  • Symbol: 1SMA4742A
  • Footprint: Diode_SMD:D_SMA
  • 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
  • 3D model files: 1sma4742a-etched.step / 1sma4742a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma4742a.step / 1sma4742a.glb are the bare package body.

Provenance

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

  • Datasheet: MDD（Microdiode Electronics） datasheet (5 pp, sha256 b0a657aa72d39a2a, 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