The Siemens 3RW3016-2BB04 is a SIRIUS soft starter in Size S00, rated 9 A at 40 °C for standard motor starting on 50/60 Hz supplies. It uses a 24 V control supply and includes an integrated bypass contact system that eliminates thyristor losses once the motor is at speed — a feature that keeps the panel cool and reduces the thermal load on surrounding components.
The spring-loaded terminals on both the main current circuit and the auxiliary/control circuit accept 0.25 to 2.5 mm² solid or stranded wire — strip length 8 mm, no ferrules required. Clearance: 60 mm above, 40 mm below, 15 mm at the side.