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SPT01-335DEE Datasheet(PDF) 9 Page - STMicroelectronics

Part # SPT01-335DEE
Description  Automation sensor transient and overvoltage protection
PDF  16 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPT01-335DEE Datasheet(HTML) 9 Page - STMicroelectronics

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SPT01-335DEE
Evaluation of the clamping voltage
5.1.2
Life time considerations
Life time of the product is calculated to exceed 10 years. The key parameters to consider
are the ambient temperature (Tamb < 100 °C), the power supply voltage (VCC < 30 V), and
the current in the reverse blocking diode (IF = 0.1 A switching at 0.5 Hz with 50% duty cycle,
the stand-by current being less than 1.5 mA).
For higher current or higher switching frequency operation, the life time should be calculated
considering the peak and average junction temperature.
This junction temperature can be reduced by reducing the thermal resistance of the
clamping diode, D1 normally. This can be done by increasing its PCB copper tab surface
SCu.



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