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1SMB3EZ5.1

Public Made by Adom

by adom

SUNMATE Elec Zener Diodes, SMB. 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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1smb3ez5-1.step Publish 0.1.0 · Ray 16h ago
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1SMB3EZ5.1

SUNMATE Elec · Zener Diodes · SMB

1SMB3EZ5.1 from SUNMATE Elec, 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 terminal, identified by the cathode band or notch; the Zener voltage for the 5.1 V type is 5.1 V at IZT = 147 mA.
2 A passive Anode terminal, opposite the cathode band; maximum forward voltage is 1.5 V at IF = 200 mA.

Key specifications

Parameter Value
Manufacturer SUNMATE Elec
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 Impedance at IZT ZZT 3.5 Ω @ IZT = 147 mA 2
Zener Impedance at IZK ZZK 550 Ω @ IZK = 1.0 mA 2
Maximum Reverse Leakage Current IR 5 μA @ VR = 1.0 V 2
Maximum DC Zener Current IZM 520 mA 2
DC Power Dissipation PD 3 Watts TL = 75 °C (Note1) 1
Maximum Forward Voltage VF 1.5 Volts IF = 200 mA 1
Thermal Resistance Junction to Ambient Air RθJA 60 K / W Note2 1
Junction Temperature Range TJ -55 175 °C 1
Storage Temperature Range Ts -55 175 °C 1
Nominal Zener Voltage VZ 5.1 V @ IZT = 147 mA 2
Zener Test Current IZT 147 mA 2

CAD (KiCad official)

  • Symbol: 1SMB3EZ5.1
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: 1smb3ez5-1-etched.step / 1smb3ez5-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1smb3ez5-1.step / 1smb3ez5-1.glb are the bare package body.

Provenance

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

  • Datasheet: SUNMATE Elec datasheet (3 pp, sha256 c7ffa07f96057398, 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