component

SMBJ5349B-MS

Public Made by Adom

by adom

MSKSEMI Zener Diodes, SMB(DO-214AA). 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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SMBJ5349B-MS

MSKSEMI · Zener Diodes · SMB(DO-214AA)

SMBJ5349B-MS from MSKSEMI, 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer MSKSEMI
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
Maximum Dynamic Impedance ZZT 2.5 Ω IZ = 100 mA 3
Maximum Reverse Current IR 2 µA VR = 9.1 V 3
Maximum Regulator Current IZM 395 mA ±5% devices (Note 5) 3
Maximum Dynamic Knee Impedance ZZK 125 Ω @1.0 mA 3
Maximum Surge Current IZSM 7.5 A Nonrecurring sine wave, 8.3 ms (Note 6) 3
Maximum Voltage Regulation ΔVZ 0.25 V Difference between voltage at 10% and 50% IZM (Note 7) 3
Nominal Zener Voltage tolerance VZ -5 5 % Devices listed without C suffix have ±5% tolerance on nominal VZ (Note 1) 4
Steady State Power Dissipation P(AV) 5 W Lead temperature at 75°C (Note 3) 2
Maximum Forward Voltage VF 1.2 V IF = 1.0 A 2
Operating Junction Temperature Range -55 150 °C 2
Storage Temperature Range -55 150 °C 2
Thermal Resistance Junction to Lead 15 °C/W Junction to lead 2
Thermal Resistance Junction to Ambient 90 °C/W Junction to ambient (Note 2) 2
Regulator Voltage (nominal) VZ 12 V IZ = 100 mA; @25°C 3

CAD (KiCad official)

  • Symbol: SMBJ5349B-MS
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
  • 3D model files: smbj5349b-ms-etched.step / smbj5349b-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smbj5349b-ms.step / smbj5349b-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (6 pp, sha256 fdbb089c9980bb8a, retrieved 2026-10-14, 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