ABB TF65-33 Thermal Overload Relay

ABB TF65-33 Thermal Overload Relay is an economical, electromechanical motor‑protection device designed to shield 3‑phase motors in ABB AF40–AF65 contactor assemblies. This three‑pole relay covers a 25–33 A operating range, with a nominal full‑load current of 33 A, and is rated for main circuits up to 480/600 V AC. Intended for use with ABB AF40–AF65 series contactors, it provides overload protection by interrupting the main circuit during sustained overcurrent conditions and coordinating with the contactor coil to disconnect power when required. The TF65‑33 carries thermal class 10 characteristics and supports fuse configurations with defined SCCR values: 5 kA with 100 A fuses (K5/RK5) or 18 kA with 110 A fuses (Class J). The product is catalogued under part number 1SAZ811201R1002. Typical applications include general‑purpose motors in conveyors, pumps, fans, and machine tools where reliable overload protection and simple integration with existing motor control are important. The TF65 family is designed for compact mounting on AF contactors, delivering straightforward, mechanical protection for motor circuits without additional electronics.