Schneider Electric's AR55.0 is a bi-metallic thermal overload heater element used with Square D AR-series motor protection relays. It is rated for up to 600 VAC and supports a current range of approximately 25.6–30.5 A, aligning with common AR-series heater applications in three-phase motor protection. As a replacement heater element, the AR55.0 is designed to fit AR-series overload relays in motor starters within industrial control panels, enabling reliable thermal protection for three-phase motors.
