component

1SMB5919B

Public Made by Adom

by adom

OTW 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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1SMB5919B

OTW · Zener Diodes · SMB

1SMB5919B from OTW, 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 OTW
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
Nominal Zener voltage (min / nom / max) VZ 5.32 5.6 5.88 V @ IZT = 66.9 mA; measured at 25 °C ambient (Note 2) 2
Maximum Zener impedance ZZT 2 Ω @ IZT = 66.9 mA; Iz(AC) = 0.1 Iz(DC), 60 Hz (Note 3) 2
Maximum Zener impedance at knee current ZZK 250 Ω @ IZK = 1 mA 2
Reverse leakage current IR 5 µA @ VR = 3 V 2
Maximum DC Zener current IZM 267 mA DC 2
Forward voltage VF 1.5 V @ IF = 200 mA (DC), for all types 1
Zener voltage tolerance (B suffix) -5 5 % Type number designation B = 5% (Note 1) 1
DC power dissipation at lead temperature PD 3 W TL = 75 °C, measured at zero lead length (Note 1) 1
Derating of DC power dissipation above TL = 75 °C PD 40 mW/°C Above TL = 75 °C 1
Maximum steady state power dissipation PD 550 mW TA = 25 °C 1
Derating of steady state power dissipation above 25 °C PD 4.4 mW/°C Above TA = 25 °C 1
Junction to ambient thermal resistance RthJA 226 °C/W Junction to ambient 1
Junction to lead thermal resistance RthJL 25 °C/W Junction to lead 1
Junction temperature range TJ -55 150 °C 1
Storage temperature range TSTG -55 150 °C 1

CAD (KiCad official)

  • Symbol: 1SMB5919B
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: 1smb5919b-etched.step / 1smb5919b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1smb5919b.step / 1smb5919b.glb are the bare package body.

Provenance

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

  • Datasheet: OTW datasheet (3 pp, sha256 2a717566c35b92b4, retrieved 2026-10-21, 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