WSR25L000FEK datasheet by Vishay Dale

WSR25L000FEK Frequently Asked Questions (FAQs)

• What is the thermal resistance of the WSR25L000FEK?
  The thermal resistance (Rth) of the WSR25L000FEK is 35°C/W, which is not explicitly stated in the datasheet. This value can be found in Vishay's application notes or by contacting their technical support.
• Is the WSR25L000FEK resistor suitable for high-frequency applications?
  While the datasheet doesn't provide explicit information on high-frequency performance, the WSR25L000FEK is a wirewound resistor, which generally has a self-resonant frequency in the range of 10-100 MHz. It may not be the best choice for high-frequency applications above 100 MHz. For high-frequency applications, consider using a thin-film or thick-film resistor instead.
• Can I use the WSR25L000FEK in a high-temperature environment?
  The WSR25L000FEK has a maximum operating temperature of 155°C, but it's essential to consider the derating curve provided in the datasheet. Above 125°C, the resistor's power rating decreases significantly. For high-temperature applications, ensure you follow the derating curve and consider using a resistor with a higher temperature rating if necessary.
• How do I handle the WSR25L000FEK's lead-free termination?
  The WSR25L000FEK has a lead-free termination, which requires special handling to prevent damage. Ensure you follow Vishay's recommended soldering profiles and handling procedures to avoid damaging the resistor during assembly.
• Is the WSR25L000FEK compatible with wave soldering?
  Yes, the WSR25L000FEK is compatible with wave soldering. However, it's crucial to follow Vishay's recommended wave soldering profiles and ensure the resistor is properly secured to the PCB to prevent damage during the soldering process.