UL ratings — heavy-duty vs light-overload
The 3AXD50000761012: Two duty ratings let you size the drive to the load profile. Light-overload (LO) bumps to 22 A and 20 Hp, meant for variable-torque applications like centrifugal pumps and fans where peak demand is short-lived. Pick the duty class that matches your pump curve, not just the motor nameplate.
NEMA 1 (IP21) means it's drip-proof and suitable for indoor, non-hazardous locations — fine for a pump house or treatment plant control room. Wall-mount form factor, frame R3. Gland plate entry at the bottom; leave enough clearance for cable bending radius and airflow above the heatsink.
