component

1SMB5949BT3G-MS

Public Made by Adom

by adom

MSKSEMI Zener Diodes, SMB. 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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1smb5949bt3g-ms-hero.glb 1smb5949bt3g-ms: hero GLB from the etched model (keeps the MPN mark) · Ray 17h ago
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1SMB5949BT3G-MS

MSKSEMI · Zener Diodes · SMB

1SMB5949BT3G-MS from MSKSEMI, in a SMB. 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
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 95 100 105 V @ IZT, TL = 30°C, ±5% tolerance 4
Zener Test Current IZT 3.7 mA Zener test current 4
Maximum Zener Impedance ZZT 250 Ω @ IZT 4
Maximum Zener Impedance at knee ZZK 3100 Ω @ IZK 4
Knee Test Current IZK 0.25 mA Zener impedance ZZK test current 4
Reverse Leakage Current IR 1 μA @ VR = 76 V 4
Reverse Voltage VR 76 V Leakage test voltage 4
Maximum DC Zener Current IZM 15 mA 4
Forward Voltage VF 1.5 V @ IF = 200 mA(dc), all types 3
Maximum Steady State Power Dissipation (lead) PD 3 W @ TL = 75°C, zero lead length 2
Derating above 75°C 40 mW/°C Derate above 75°C 2
Thermal Resistance Junction-to-Lead RθJL 25 °C/W 2
Maximum Steady State Power Dissipation (ambient) PD 550 mW @ TA = 25°C, FR-4 board, recommended footprint 2
Derating above 25°C 4.4 mW/°C Derate above 25°C 2
Thermal Resistance Junction-to-Ambient RθJA 226 °C/W FR-4 board, recommended footprint 2
Operating and Storage Temperature Range TJ, Tstg -65 150 °C 2
Zener Voltage Tolerance -5 5 % Type numbers indicate ±5% tolerance 4

CAD (KiCad official)

  • Symbol: 1SMB5949BT3G-MS
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: 1smb5949bt3g-ms-etched.step / 1smb5949bt3g-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1smb5949bt3g-ms.step / 1smb5949bt3g-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (8 pp, sha256 d1db003dcf102a3c, retrieved 2026-10-22, 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