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SMB3Z47A

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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smb3z47a-etched.step smb3z47a: factory component page (tier=lcsc) · Ray 6d ago
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SMB3Z47A

XCH(旭昌辉) · IC · SMB

SMB3Z47A 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, the end marked by the color band; it goes positive relative to the anode in Zener (reverse) operation, and the SMB3Z47A has a nominal VZ of 47 V (44.65 to 49.35 V).
2 A passive Anode, the end opposite the color band; the maximum forward voltage is 1.2 V at IF = 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 (min / nominal / max) VZ 44.65 47 49.35 V Nominal Zener voltage @ IZT = 16.0 mA 3
Maximum Zener impedance ZZT 38 Ω @ IZT = 16.0 mA 3
Maximum Zener impedance (knee) ZZK 1500 Ω @ IZK = 0.25 mA 3
Maximum reverse leakage current IR 0.5 uA @ VR = 35.6 V 3
Maximum DC Zener current IZM 57 mA 3
Maximum forward voltage VF 1.2 V IF = 200 mA 1
DC power dissipation PD 3 W TL = 75 °C (lead temperature at 3/8 in (9.5 mm) from body) 1
Storage temperature range TJ, TSTG -55 150 °C 1
Junction temperature range TJ, TSTG -55 150 °C 1

CAD (KiCad official)

  • Symbol: SMB3Z47A
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: smb3z47a-etched.step / smb3z47a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smb3z47a.step / smb3z47a.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