What this integrated reversing starter is
The Siemens 3RA8522-4EE10 is a fully integrated reversing starter from the SIRIUS 3RA8 intelligent load feeder family, combining a reversing contactor assembly, a motor protective circuit breaker, and the control wiring into a single pre-configured unit for the ET 200SP distributed I/O system. Rated for motor currents from 3.5 A up to 32 A at voltages up to 690 V AC, with type of coordination 2, meaning the starter clears a short-circuit fault without damage to the contactor — critical for maintaining uptime on a motor branch. The assembly comprises three subcomponents: a 3RC7141-4EE11 communication module, a 3RV2321-4EC20 circuit breaker, and two 3RT2027-2BB40 contactors, all pre-wired and tested as a single orderable unit.
Frame size S0 and ET 200SP integration
Frame size S0 means the starter occupies a defined footprint on the ET 200SP mounting rail, with the communication module plugging directly into the system backplane for PROFINET or PROFIBUS connectivity — no point-to-point control wiring for the reversing logic. Packaged dimensions of 320 x 240 x 160 mm (L x W x H) give a sense of the assembled unit's envelope; the S0 frame itself is the dimension to check against existing panel cutouts or cabinet depth.
RoHS compliant since June 2024, with a REACH Article 33 declaration for lead (CAS 7439-92-1) above 0.1% w/w — relevant for EU compliance documentation on the BOM. This is a standard stockable product (product class A), meaning it can be returned within the standard returns window if unopened — useful if a project timeline shifts.