The part number 6SL3266-1EB00-0KA0 refers to a Siemens SINAMICS G120C screening plate for the FSB frame size, which includes mounting accessories to properly secure it and provide electromagnetic shielding for the motor and signal cables. This accessory is compatible with the SINAMICS G120C compact drive and is also used with the PM 230 Power Module for the SINAMICS G120 modular frequency converter. 
Key features and uses: 

• Manufacturer: Siemens
• Product Line: SINAMICS G120C
• Accessory Type: Screening Plate
• Purpose: Provides electromagnetic interference (EMI) shielding for motor and signal cables
• Compatibility: Suitable for frame sizes FSA to FSC and for the PM230 Power Module
• Includes: The set includes both the screening plate and necessary mounting accessories.