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1SMA5937BT3G

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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1SMA5937BT3G

onsemi · Zener Diodes · SMA

1SMA5937BT3G 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 terminal, identified on the package by the polarity band or molded polarity notch; it is the terminal that is positive in Zener (reverse) breakdown.
2 ANODE passive Anode terminal, the terminal opposite the cathode band, carrying forward current when the device is biased into conduction.

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 31.35 33 34.65 V @ IZT = 11.4 mA (Note 4: at thermal equilibrium) 2
Zener voltage tolerance (type number designation) -5 5 % Type number designation, Note 3 2
Maximum Zener Impedance ZZT 33 OHMS @ IZT = 11.4 mA 2
Maximum Zener Impedance ZZK 800 OHMS @ IZK = 0.25 mA 2
Maximum DC Zener Current IZM 45 mA(dc) 2
Forward Voltage VF 1.2 V @ IF = 200 mA, for all types 2
DC Power Dissipation PD 1.5 W TL = 75°C, measured zero lead length (Note 1) 1
DC Power Dissipation PD 0.5 W TA = 25°C (Note 2) 1
Operating and Storage Temperature Range TJ, Tstg -65 150 °C 1
Thermal Resistance, Junction-to-Lead RθJL 50 °C/W 1 in square copper pad, FR-4 board (Note 1) 1
Thermal Resistance, Junction-to-Ambient RθJA 250 °C/W FR-4 board, onsemi minimum recommended footprint (Note 2) 1

CAD (KiCad official)

  • Symbol: 1SMA5937BT3G
  • Footprint: Diode_SMD:D_SMA
  • 3D model: SMA (KiCad packages3D, STEP)
  • 3D model files: 1sma5937bt3g-etched.step / 1sma5937bt3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma5937bt3g.step / 1sma5937bt3g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (6 pp, sha256 f462474d29a69587, 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