Light-overload (20 Hp, 22 A) covers variable-torque centrifugal pumps and fans where the drive only sees peak current during start-up. Both curves are UL-listed, so no derating guesswork for North American panel builds.
IP55 and NEMA Type12 give you dust and hose-down protection — mount it directly on the wall next to the pump panel, no need for a separate enclosure. The frame size isn't listed in the spec, so verify the physical footprint against your backplate layout before drilling. Gland plate entry for the power and control cables; leave clearance for the minimum bend radius on the motor leads.
