Square D AR44 Thermal Overload Relay Element Heater

Square D AR44.0 Thermal Overload Heater Element is a dedicated heating element used in Square D AR-series thermal overload relays to provide the thermal sensing function of the protective relay. It is listed as AR44.0 (also called AR 44 heater) with replacement part number 58614 and UPC 785901586142 for ordering. The AR44.0 heater is specified for a motor full-load current range of 22.0 to 23.8 A, with the exact value depending on the connected motor and system configuration. This unit is produced by Square D (Schneider Electric), a long‑standing supplier of motor protection components, and is part of the AR44.0 thermal unit family. Use of the AR44.0 heater element ensures compatibility with Square D overload-relay assemblies that require the AR44.0 heater, simplifying maintenance and part replacement in industrial control panels.