component

1SMA5942BT3G

Public Made by Adom

by adom

onsemi Zener Diodes, SMA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1SMA5942BT3G

onsemi · Zener Diodes · SMA

1SMA5942BT3G from onsemi, 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 CATHODE passive Cathode is marked by the polarity band (or molded polarity notch) on the SMA package, per Style 1 pin 1 = CATHODE (POLARITY BAND).
2 ANODE passive Anode is the non-banded terminal of the SMA package, listed as Style 1 pin 2 = ANODE.

Key specifications

Parameter Value
Manufacturer onsemi
Package SMA
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
Reverse Zener Voltage VZ 48.45 51 53.55 V @ IZT = 7.3 mA 2
Maximum Zener Impedance @ IZT ZZT 70 ohm @ IZT = 7.3 mA 2
Maximum Zener Impedance @ IZK ZZK 1100 ohm @ IZK = 0.25 mA 2
Reverse Leakage Current IR 0.5 µA @ VR = 38.8 V 2
Forward Voltage VF 1.2 V @ IF = 200 mA 2
Maximum DC Zener Current IZM 29 mA(dc) 2
Zener voltage tolerance designation -5 5 % Type number with B suffix indicates ±5% tolerance (Note 3) 2
DC Power Dissipation PD 1.5 W @ TL = 75°C, measured zero lead length (Note 1) 1
Derate above 75°C (lead temperature) 20 mW/°C Derate above TL = 75°C 1
Thermal Resistance, Junction-to-Lead RJL 50 °C/W Junction-to-lead 1
DC Power Dissipation PD 0.5 W @ TA = 25°C (Note 2) 1
Derate above 25°C (ambient) 4 mW/°C Derate above TA = 25°C 1
Thermal Resistance, Junction-to-Ambient RJA 250 °C/W Junction-to-ambient (Note 2) 1
Operating and Storage Temperature Range TJ, Tstg -65 150 °C 1

CAD (KiCad official)

  • Symbol: 1SMA5942BT3G
  • Footprint: Diode_SMD:D_SMA
  • 3D model: SMA (KiCad packages3D, STEP)
  • 3D model files: 1sma5942bt3g-etched.step / 1sma5942bt3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma5942bt3g.step / 1sma5942bt3g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (5 pp, sha256 718bfbda0fd2b50b, retrieved 2026-10-21, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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