Motor Overload Relays

Optimize and protect your motor.

Motor overload relays are used to provide motors with protection against damage caused by overloads. Whether it’s a thermal overload, a current overload or a power overload, motor overload relays are designed to open a normally closed circuit whenever it experiences an overload of a specific type. Motor overload relays have adjustable current ratings, making them versatile enough to use across many industrial and commercial applications and wherever motor control is required. These relays can be reset automatically or manually.

Choosing your motor overload relay.

Motor overload relays are built to meet both IEC and NEMA standards. IEC relays tend to be smaller in size while also being less expensive, and they also offer single phase detection. NEMA relays are bigger in size but are more rugged and can better withstand overloads; however IEC motor overload relays can detect overloads much quicker. NEMA relays are more widely applicable across different operations, while IEC relays are designed more precisely for specific applications. NEMA relays are also ranked according to how quickly they must trip, and are ranked as one of three classes: Class 10, class 20, or class 30. Both NEMA and IEC motor overload relays can get the job done, it’s just a matter of application, personal preference and motor requirements.