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Square D B45.0 is a melting-alloy thermal unit designed to protect motors, controllers, and branch-circuit conductors from prolonged motor over-currents, including locked rotor currents. It uses a one-piece construction with an internal heater winding and a melting solder element to actuate a trip, and is specified for Class 20 trip characteristics with a manual reset.
Melting-alloy Class 20 thermal unit for motor overload protection with plug-in mounting and 51â61.7 A FLA coverage.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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