The ABB 3AUD0000003514 is an ACQ580 irrigation drive package — a purpose-built VFD for pump loads in agricultural and water-handling applications. It's a 3-phase unit in an R4 frame, rated for 440 to 480 V input at 50/60 Hz. The heavy-duty UL rating lands at 40 Hp and 52 A, but the light-overload curve goes to 50 Hp and 65 A — that's the number you size the motor cable and upstream protection for when the pump isn't hammering the drive with constant peak torque. The NEMA Type1 enclosure and IP21 protection mean it's fine for indoor pump houses or sheltered irrigation panels. It's not washdown-rated — keep it out of direct spray. The R4 frame is a common size on this line; if you're swapping into an existing ACQ580 install, the mounting footprint and ducting pattern should match other R4 units in the family.
No need to hunt NOS or worry about a PCN that shifts the form/fit/function mid-project. If you're planning a multi-year irrigation rollout, this part number stays stable.
The heavy-duty current of 52 A is the number for constant-torque loads like screw pumps or positive-displacement irrigation feeders. The light-overload rating of 65 A gives you headroom for variable-torque centrifugal pumps — the most common irrigation scenario — where the drive only sees peak current during startup or if the well level drops. Size your input breaker and motor cable for the 65 A light-overload figure; the drive's internal IGBTs can handle that sustained current under pump duty. At 460 V nominal, the 50 Hp light-overload rating is the spec that matches most North American 50 Hp irrigation motors. If your motor nameplate is 40 Hp, you've got a full 25% service factor headroom in the drive — useful for soft-starting a long line shaft or handling voltage sags at the end of a rural feeder.
The R4 frame has a standard mounting pattern for the ACQ580 family. If you're replacing an older R4 ABB drive (like an ACS550 or ACS580 in the same frame), the gland plate knockouts and DIN-rail mounting holes should align. The IP21 / NEMA Type1 enclosure means you can mount it in a ventilated indoor panel without extra sealed cooling — just watch the ambient temp derating if the pump house hits 40°C+ in summer. Input power lands on a 3-phase terminal block rated for the 65 A full-load amps. Use 90°C-rated copper wire sized per NEC table 310.15(B)(16) for 65 A — typically 4 AWG for the line side. The drive's internal DC bus is not user-accessible on this package; braking resistor connections are on the main power terminals if you need dynamic braking for a vertical turbine pump.