SINAMICS G120X compresses its power range into a small number of frame sizes, and nowhere is that more visible than at the top of the FSF tier: the 110 kW and 132 kW units share the same 709 mm frame height. That sounds like a free upgrade — same cabinet drawing, same mounting holes — but the two ratings differ in current, overload behavior and cooling, and picking wrong shows up as nuisance trips on hot days.
What changes between 110 and 132 kW
The frame is identical, but the rated output current is not. The official datasheet makes the story precise: the same 709 mm FSF hardware carries 132 kW (250 A) at LO duty and 110 kW (205 A) at HO duty at 400 V — one frame, two rating philosophies, and the built-in fan, DC-link and power module stack stressed proportionally harder at the higher rating. If your motor nameplate sits between the two ratings, the honest question is not "can the 132 kW drive run it" but "does the duty cycle ever lean on the overload reserve."
Size by motor current, not by kW
Pump and fan duty is the G120X's home ground, and these loads rarely need the overload a compressor or hoist does. Match the drive's rated current to the motor's rated current at your actual supply voltage — 380, 400 or 415 V shifts the numbers. If the motor draws 205 A, the 110 kW FSF carries it with margin; if it draws 240 A, you are on the 132 kW unit whether you like the price or not.
Both ratings are available as C2-filtered, unfiltered or C3-filtered variants with or without DC terminals, so the variable frequency drive family lets you keep everything else identical when you step up. For a 250 kW-class pump room, the next frame up is the FSG tier covered separately.
Does the same frame mean the same braking and EMC behavior?
Essentially yes. Frame geometry, EMC filter class options and DC-terminal provision carry across the tier, which is why retrofitting a 110 kW installation to 132 kW rarely touches the cabinet. Verify the supply fusing and cable cross-section against the higher rated current before you order.
Which one for a duty with 110% overload spikes?
The G120X is built for pump and fan loads (LO/HO rating), not for repeated high-torque overload. If your load genuinely cycles above rated current, move up a rating — the 132 kW unit running a 110 kW motor keeps a healthier thermal reserve than the 110 kW running at its limit.
