Sizing the drive against the motor
The 6SL3220-1YD28-0UB0: The headline rating is 2.10 A on the low-overload (LO) duty, which is the figure to use when the motor is sized for constant-torque loads like conveyors, mixers, and positive-displacement pumps — the LO curve, not a higher intermittent number, is what governs continuous service. Inside that current ceiling, the line-voltage tolerance of +10 % / -20 % at 380... 440 V gives the headroom to ride through generator-fed or weak-grid supplies without tripping on undervoltage, which matters on islanded plant sections and during emergency transfer.
Where it lands in the cabinet
IP 40 on this form factor means finger-safe against ingress of tools and wires greater than 1 mm but no protection against liquid ingress, so the converter belongs inside a sealed enclosure — not on the washdown face of a food-line panel or in an outdoor kiosk without its own cabinet shelter.
Lifecycle posture and procurement route
Estimated lead time on the order channel sits at 1 - 10 working days, so a planned spare can ride in on a normal procurement cycle without burning an emergency-expedite budget, provided that the quantity and country of origin are firmed up at RFQ.