Siemens 6SL3121-2TE21-0AA3

The Siemens catalog number 6SL3121-2TE21-0AA3 refers to a SINAMICS S120 double motor module designed for 600 VDC operation with a 9 A input on a 3-phase 400 V supply. This module features a compact, book-size external frame, making it suitable for installations where space is limited. Although this particular model has been discontinued since September 2014 and replaced by an updated version (6SL3121-2TE21-0AA4), it remains a key reference for systems using the earlier configuration. BSP Automation offers support and solutions related to this module, helping customers with both legacy equipment and transition to newer models.