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1SMA5942BT3G-MS

Public Made by Adom

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

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1SMA5942BT3G-MS

MSKSEMI · Zener Diodes · SMA

1SMA5942BT3G-MS from MSKSEMI, 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, indicated by the molded polarity notch or cathode band; Zener voltage 51 V nominal (48.45 V to 53.55 V) at IZT = 7.3 mA for the 1SMA5942B type, reverse-biased in regulation.
2 A passive Anode of the Zener diode; forward voltage VF is 1.2 V max at IF = 200 mA.

Key specifications

Parameter Value
Manufacturer MSKSEMI
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
Zener Voltage VZ 48.45 51 53.55 V @ IZT = 7.3 mA, TA = 25°C 3
Zener Test Current IZT 7.3 mA Test current for VZ and ZZT 3
Maximum Zener Impedance ZZT 70 Ω @ IZT = 7.3 mA 3
Maximum Zener Impedance ZZK 1100 Ω @ IZK = 0.25 mA 3
Reverse Current (knee) IZK 0.25 mA Test current for ZZK 3
Reverse Leakage Current IR 0.5 μA @ VR = 38.8 V 3
Reverse Voltage VR 38.8 V Test voltage for IR 3
Maximum DC Zener Current IZM 29 mA 3
Forward Voltage VF 1.2 V @ IF = 200 mA, all types 3
DC Power Dissipation (lead) PD 1.5 W @ TL = 75°C, zero lead length, 1 in square copper pad FR-4 2
Derating above 75°C 20 mW/°C Above TL = 75°C 2
DC Power Dissipation (ambient) PD 0.5 W @ TA = 25°C, FR-4 board, minimum recommended footprint 2
Derating above 25°C 4 mW/°C Above TA = 25°C 2
Operating and Storage Temperature Range TJ, Tstg -65 150 °C 2
Thermal Resistance, Junction-to-Lead RθJL 50 °C/W 1 in square copper pad, FR-4 board 2
Thermal Resistance, Junction-to-Ambient RθJA 250 °C/W FR-4 board, minimum recommended footprint 2
Zener Voltage Tolerance -5 5 % Type number indicates tolerance of ±5% 3

CAD (KiCad official)

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

Provenance

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

  • Datasheet: MSKSEMI datasheet (7 pp, sha256 84b58db054664c6f, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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