Automation sensor transient and overvoltage protection

The SPT02 is specifically designed for the protection of 24 V proximity sensors. It implements the reverse polarity and the overvoltage protection of the sensor power supply and the power switch overvoltage protection.

It provides a very compact and flexible solution.

Thanks to high performance ST technology, the SPT02 protects the proximity sensor to the highest level compliant with IEC 61000-4-2, IEC 61000-4-4 and IEC 61000-4-5 standards.

Key Features

  • Double diode array for switch protection and reverse blocking protection
  • 6 V to 36 V supply voltage range
  • Minimum breakdown voltage VBR : 38 V
  • 8/20 μs 2 A maximum clamping voltage: 46 V
  • Blocking diode drop forward voltage VF : 1.1 V at 300 mA
  • Blocking diode maximum 10 ms square pulse current IFSM : 3 A
  • Ambient temperature: -40 °C to +100 °C
  • μQFN 2L 0.8 mm flat package
  • Complies with following standards
    • Voltage surge: IEC 61000-4-5, RCC = 500 Ω, ±1 kV
    • Electrostatic discharge, IEC 61000-4-2:
      • ±8 kV contact discharge
      • ±15 kV air discharge
    • Electrical transient immunity: IEC 61000-4-4: ±2 kV
  • Benefits
    • Compliant for interface with logic input type 1, 2 and 3 IEC 61131-2 standard
    • Highly compact with integrated power solution in SMD version



Description Version Size
DS9518 DS9518: Automation sensor transient and overvoltage protection 2.0 448 KB
Description Version Size
AN4275 AN4275: IEC 61000-4-5 standard overview 1.0 383 KB
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型号 Stand-off voltage (V) (nom) Directionality Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
SPT02-236DDB 36 Uni-Directional uQFN-2L Tape And Reel Active 0.54 50 NEC EAR99 CHINA MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors


型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SPT02-236DDB ActiveuQFN-2LIndustrialEcopack2 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.