The PHOENIX CONTACT part 2900948 is a versatile plug-in module designed for mounting on RIF-1, RIF-2, RIF-3, and RIF-4. It features a built-in varistor for added protection. With an input voltage range of 120 to 230 V AC/DC and a ±20% tolerance, this module ensures reliable and efficient operation. Whether used in industrial or commercial applications, this plug-in module is a reliable choice for safeguarding your electrical circuits.