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1SMB5944B

Public Made by Adom

by adom

BORN Zener Diodes, SMB(DO-214AA). 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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1SMB5944B

BORN · Zener Diodes · SMB(DO-214AA)

1SMB5944B from BORN, in a SMB(DO-214AA). 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, identified by the color band on the SMB(DO-214AA) body; positive with respect to the anode in Zener breakdown operation (1SMB5944B: Vz 58.9 to 65.1 V at IZT 6 mA).
2 A passive Anode terminal of the Zener diode; the datasheet gives no pin numbering, only polarity marked by the cathode color band.

Key specifications

Parameter Value
Manufacturer BORN
Package SMB(DO-214AA)
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 58.9 65.1 V IZT = 6 mA 2
Test current IZT 6 mA 2
Dynamic impedance ZZT 100 Ω at IZT 2
Knee impedance ZZK 1500 Ω IZK = 0.25 mA 2
Reverse current IR 1 µAdc VR = 47.1 V 2
Max DC current IZM 24 mA 2
Power Dissipation PD 3 W TL=75°C 1
Storage Temperature Range TSTG -55 150 °C 1
Operating Junction Temperature Range TJ -55 150 °C 1
Max Forward Voltage VF 1.2 V IF=200MA 1
Thermal Resistance Junction To Ambient Air RθJA 100 °C/W 1
Thermal Resistance Junction To Leads RθJL 25 °C/W 1

CAD (KiCad official)

  • Symbol: 1SMB5944B
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
  • 3D model files: 1smb5944b-etched.step / 1smb5944b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1smb5944b.step / 1smb5944b.glb are the bare package body.

Provenance

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

  • Datasheet: BORN datasheet (5 pp, sha256 d157179bacadcf36, retrieved 2026-10-22, 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