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Can the C440 or XTOE overload relay be used for DC applications?

The C440/XTOE overload relays can not be used to protect DC systems. The overload relay does not power up on DC. The status light on the face of the unit will light up and blink once every 2 seconds when it is functioning properly, and there is no fault condition.

Please see the C440 NEMA Electronic Overload Instruction Leaflet or XTOE/ZEB IEC Electronic Overload Instruction Leaflet for more information on the status light and functionality of the C440/XTOE.