Booksize C frame, two axes in one slot
The Siemens 6SL5120-2UE21-8SC0 sits in the SINAMICS S220 family of Double Motor Modules in booksize format — a single module that drives two independent axes from one slot in the rack, which is why a 2x22.5 A input DC bus upstream feeds 2x18 A outputs at 0-480 V 3AC and a rated 2x7.5 kW per axis. That output frame matters to the controls integrator: cabinet heat load doubles for two axes in one book, and the internal-air-cooling-only design forces fan clearance above and below the module per the booksize installation guide. The packaging footprint of 365.00 x 565.00 x 60.00 mm matches the standard booksize C cutout, so it drops into an existing S220 line-up cabinet without re-machining the backplane, provided the firmware on the rest of the line is at FW V5.2 SP3 HF10 or later — the module is built only from that firmware forward.
Active in production, group R220
Lifecycle is recorded as Active and the production status is current on the Siemens record. Returns-handling class A confirms it remains a normal Siemens stocking line, not a last-time-buy artifact. The module carries Group Code R220 and Product Group X0HX in the Siemens commercial hierarchy, with the part sold in single-piece quantities and packaged one per shipper.
Compliance paperwork on record
Siemens documents RoHS substance compliance since 22-03-22 and flags REACH Article 33 candidate-list presence of lead at CAS-No. 7439-92-1 above the 0,1 % (w / w) threshold — a standard declaration for drives with lead-bearing solder and terminal finishes. Export-control classification reads AL:N / ECCN:3A999A, the typical low-restriction class for commercial drives not reaching military or encryption-only thresholds.