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1SMB3EZ18_R2_00001

Public Made by Adom

by adom

PANJIT International TVS, SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1SMB3EZ18_R2_00001

PANJIT International · TVS · SMB

1SMB3EZ18_R2_00001 from PANJIT International, 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 end marked by the color band; the zener is operated reverse-biased with this pin positive (1SMB3EZ18: VZ 18 V nominal, 17.1 to 18.9 V at IZT 42 mA).
2 A passive Anode terminal of the glass passivated zener diode (3 W steady-state power dissipation at TL=75°C, peak forward surge current 15 A).

Key specifications

Parameter Value
Manufacturer PANJIT International
Package SMB
Category TVS/Fuse/Board Level Protection
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
Nominal Zener Voltage VZ 17.1 18 18.9 V @ IZT = 42 mA 2
Maximum Zener Impedance ZZT 6 Ω @ IZT = 42 mA 2
Maximum Knee Zener Impedance ZZK 750 Ω @ IZK = 0.25 mA 2
Max Reverse Leakage Current IR 0.5 μA @ VR = 13.7 V 2
Zener Test Current IZT 42 mA 2
Zener Knee Current IZK 0.25 mA 2
Steady State Power Dissipation PD 3 W TL=75 °C, infinite heatsink (Note 1) 1
Peak Forward Surge Current IFSM 15 A 8.3ms single half sine-wave superimposed on rated load 1
Operating Junction and Storage Temperature Range TJ,TSTG -55 150 °C 1

CAD (KiCad official)

  • Symbol: 1SMB3EZ18_R2_00001
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: 1smb3ez18-r2-00001-etched.step / 1smb3ez18-r2-00001-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1smb3ez18-r2-00001.step / 1smb3ez18-r2-00001.glb are the bare package body.

Provenance

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

  • Datasheet: PANJIT International datasheet (6 pp, sha256 822ac9e8a5d3a188, 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