Power module for 380-480 V lines — what the ratings mean
The Siemens 6SL3211-1NE21-8UG1 is a SINAMICS G120 PM230 Power Module rated for 380-480 V AC three-phase input at 47-63 Hz, delivering 7.5 kW under low overload (LO) conditions — meaning it handles 150% rated current for 3 seconds, 110% for 57 seconds, and 100% continuously for 240 seconds, all within a 0 to +40 °C ambient. That overload profile suits pump, fan, and conveyor loads where short-duration torque spikes are the exception, not the rule. The FSB frame size (345 x 154 x 171 mm) determines the panel cutout and cooling clearance; it ships without a Control Unit, requiring a CU240B/E-2 or CU230P-2 with firmware V4.4 or higher.
Sourcing and lifecycle — mature, not obsolete
If you're refreshing an existing G120 installation, the firmware compatibility note (CU240x-2 with V4.4 or higher) is the key constraint when pairing it with a new Control Unit.