Duty ratings that matter
The 3AXD50001057442: Three duty ratings let you size the drive to the load profile. Normal use (Pn 400 kW, In 730 A) covers constant-torque applications like conveyors or pumps running at full speed. Heavy-duty use (PhD 250 kW, IhD 546 A) handles higher peak torque demands — think crushers or extruders that need that extra grunt on startup. Pick the rating that matches your motor nameplate and duty cycle; the drive's internal thermal model will protect it.
What's inside the frame
The R8i+R8i frame houses two lithium coin cells (BR2032, 3 V, 200 mAh each) likely for real-time clock backup or parameter retention. Operating humidity range is 5 to 95 % RH, non-condensing — typical for a drive in a climate-controlled electrical room. No UL horsepower or current ratings are listed for this variant (– show dashes), so if UL listing is a spec gate, confirm with the factory before committing.