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SMF30A CK

Public Made by Adom

by adom

JUXING ESD And Surge Protection (TVS/ESD), SOD-123FL. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SMF30A CK

JUXING · ESD And Surge Protection (TVS/ESD) · SOD-123FL

SMF30A CK from JUXING, in a SOD-123FL. 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 Cathode passive Cathode of the unidirectional TVS (SMF30A, marking CK), 30 V VRWM, 33.3 V min / 36.8 V max breakdown at 1 mA, 48.4 V max clamping voltage at 4.1 A peak pulse current.
2 Anode passive Anode of the TVS diode; the 200 W peak pulse power rating (10/1000 us) applies to the device.

Key specifications

Parameter Value
Manufacturer JUXING
Package SOD-123FL
Category Circuit 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
Reverse Stand-off Voltage VRWM 30 V SMF30A 2
Breakdown Voltage VBR 33.3 36.8 V @ IT = 1 mA 2
Test Current IT 1 mA 2
Reverse Leakage Current IR 1 µA @ VRWM 2
Max. Clamp Voltage VC 48.4 V @ IPP 2
Peak Pulse Current IPP 4.1 A 10/1000 us waveform 2
Peak Pulse Power Dissipation PPPM 200 W TA=25°C, 10/1000us 1
Peak Forward Surge Current IFSM 20 A 8.3ms single half sinewave (UNI) 1
Steady State Power Dissipation PM(AV) 1 W TL=75°C 1
Operating Junction and Storage Temperature Range TJ,TSTG -55 150 °C 1
Typical Thermal Resistance RθJA 180 °C/W 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper 2. Mounted on 5mm copper pads to each terminal 1

CAD (KiCad official)

  • Symbol: SMF30A CK
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123FL (KiCad packages3D, STEP)
  • 3D model files: smf30a-ck-etched.step / smf30a-ck-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smf30a-ck.step / smf30a-ck.glb are the bare package body.

Provenance

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

  • Datasheet: JUXING datasheet (4 pp, sha256 3b5a2aa506e6a0b2, 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