Sizing from 380 to 440 V supply at 2.10 A base
The Siemens 6SL3220-1YD18-0UB0 is a Control Panel-format frequency converter built around a 3-phase 380–440 V supply window with +10 % / -20 % tolerance, so it tolerates weak industrial mains on the low side and stays inside spec on lightly elevated transformer taps (cites:,). Base current is published as 2.10 A in low-overload (LO) duty, which frames the converter for low-power three-phase motor loads — small fans, light conveyors, metering pumps — rather than the heavier constant-torque ratings used on the larger SINAMICS frames (cites:).
IP 40 housing and panel-side mounting
Enclosure class is IP 40, which means the chassis is finger-safe from the front but rated only against ingress of tools and wires larger than 1 mm — it must sit inside a control cabinet or a sealed equipment room, not at the washdown edge of a process line (cites:). The adjacent product number 6SL3220-1YD10-0UB0 sits in the same 6SL3220 SINAMICS family; if the 2.10 A LO frame proves tight on motor current, that neighbouring plate is the next step in the lineup rather than an unrelated substitute (cites:).
Mature line — supply posture, no successor on record
Reorder coverage is listed at 1–10 working days from quote acceptance, which is the kind of window a maintenance planner can hold a multi-year spares stock against rather than carrying the part in the warehouse ready-drawer (cites:).