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SMB3Z190A

Public Made by Adom

by adom

XCH(旭昌辉) , 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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SMB3Z190A

XCH(旭昌辉) · IC · SMB

SMB3Z190A from XCH(旭昌辉), 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, marked by the color band on the DO-214AA body; it goes positive of the anode in Zener (reverse) operation, with VZ 190 V nominal (180.5 to 199.5 V) at IZT 4.0 mA.
2 A passive Anode, the end opposite the color band; forward voltage is at most 1.2 V at 200 mA.

Key specifications

Parameter Value
Manufacturer XCH(旭昌辉)
Package SMB
Category
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 (nominal, min, max) VZ 180.5 190 199.5 V 3
Maximum Zener impedance ZZT 800 Ω @IZT 4.0 mA 3
Maximum Zener impedance (knee) ZZK 8000 Ω @IZK 0.25 mA 3
Maximum reverse leakage current IR 0.5 uA @VR 144.8 V 3
Maximum DC Zener current IZM 14 mA 3
Maximum forward voltage VF 1.2 V IF=200mA 1
DC power dissipation PD 3 W TL = 75 °C (note 1) 1
Storage temperature range TSTG -55 150 ℃ 1
Junction temperature range TJ -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: SMB3Z190A
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: smb3z190a-etched.step / smb3z190a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smb3z190a.step / smb3z190a.glb are the bare package body.

Provenance

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

  • Datasheet: XCH(旭昌辉) datasheet (3 pp, sha256 f7084c044e53fbe6, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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