The Siemens 6SL3121-1TE13-0AA4 is a SINAMICS S120 Single Motor Module in the booksize format, designed as a spare part for existing drive lines. It takes a 600 V DC input and delivers 400 V three-phase AC output at 3 A, with external air cooling.
Integration and deployment context
Booksize format means it slots into a shared cabinet with other S120 modules on a common DC bus — typical for multi-axis machines where one line-side module feeds several motor modules. External air cooling requires clearance around the heatsink fins; don't stack modules tight without the airflow path. The module supports optimized pulse patterns and extended Safety Integrated functions, including DRIVE-CLiQ cable for communication back to the control unit. That makes it a fit for applications needing safe torque off or safe speed monitoring without a separate safety relay.
Lifecycle stage is listed as mature — Siemens still supports it, but it's not a new-design-in recommendation. The documentation carries a 30.03.2021 revision date, meaning the design and support data are stable.