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IEC Overload Relays

Available239 products

IEC overload relays are made to standards designated by the International Electrotechnical Commission (IEC). Also known as IEC overloads, they are electromagnetic switches that send signals to contactors to de-energize circuits when excessive current or phase failure is detected, protecting motors, machinery, equipment, and high-voltage systems from overheating and being damaged.

IEC motor overload relays combine with compatible contactors to create motor starter assemblies.

IEC Thermal Overload Relays

IEC Thermal Overload Relays

These IEC thermal overload relays prompt contactors to break electrical connections with downstream equipment once a set temperature is reached to protect connected loads from overheating and causing damage. Thermal units, also known as heaters, contain either bimetallic strips or melting alloy solder materials. When the current exceeds a predetermined threshold and temperatures rise, the material bends or liquefies, causing the thermal unit to break the circuit and cause the contactor to break its power contacts. As the materials cool down, they will return to their normally closed position and the circuit can be reset automatically or manually.

Relay Mounting Style: Direct To Contactor

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Relay Mounting Style: Separately Mounted

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IEC Electronic Overload Relays

IEC Electronic Overload Relays
These IEC electronic overload relays trigger contactors to break electrical connections with downstream equipment once the current reaches a pre-determined range of full-load amperage. They have adjustable current settings and use semiconductors to monitor for overload conditions and trip once the current exceeds that set point. Electronic overload relays turn circuits on and off faster, are more accurate, and have longer service lives than thermal overload relays.

Relay Mounting Style: Direct To Contactor

Number of Poles: Unspecified

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2 Pole

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3 Pole

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Relay Mounting Style: Separately Mounted

3 Pole

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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order.