The Siemens SIRIUS 3RV1935-5E-ZX90 is a 3-phase supply terminal designed to feed power through 3-phase busbars into a self-protection combination motor controller (type E) that uses a 3RV Size S2 circuit breaker. Connection is from above via fork-shaped terminals, and it ships in a multi-unit pack of 20.
This part is flagged as a phased-out product. The lifecycle stage is listed as current, but the description explicitly states it is a phased-out product and that the successor is the SIRIUS 3RV2 series.