Reversing starter in a single package — Size S0
The 3RA2225-1DB23-0BB4: This is a non-fused reversing motor starter (SIRIUS 3RA2 series) — two contactors with a mechanical interlock, a thermal bimetallic overload relay (Trip Class 10), and a Size S00 circuit-breaker, all pre-assembled in one unit. The reversing design means forward/reverse control of a three-phase motor without an external interlock or separate contactor pair, saving panel space and wiring time. Size S0 load feeder — the physical frame that determines DIN-rail footprint and busbar compatibility across the SIRIUS family. Snaps onto a 35 mm standard rail (EN 60715) without tools. Mounting position is vertical only.
24 V control — what it means for panel integration
Rated control voltage is 24 V (likely DC, standard for industrial PLC cabinets). The starter draws its coil power from the 24 V bus — no separate AC control transformer needed. Main contact wiring accepts stranded conductors 1–10 mm² (single) or 2 × 2.5–6 mm² (two per terminal). This covers most motor feeder sizes up to the starter's rating.
Motor power ratings across common voltages
At 400 V the rating is 1 100 W; at 500 V it is 1 500 W. Current ratings at 480 V and 600 V are 2.8 A and 3.16 A respectively (AC-3 duty). This covers small pumps, fans, conveyors, and machine-tool spindles up to 2 hp. Maximum AC-3 rated voltage is 690 V — the contactor's insulation and arc-chamber design handle line-to-line up to that level, though the motor power ratings top out at 600 V.
Physical dimensions — panel layout fit
Depth 130 mm, width 90 mm, height 265 mm. The DIN-rail clip adds 30 mm upwards clearance and 10 mm forwards clearance; no backwards clearance needed. Side clearance is 9 mm. These numbers decide the gland-plate fill and the minimum enclosure depth for a 35 mm rail profile.
Environmental and compliance
Operating temperature range –20 to +60 °C; storage –50 to +80 °C; transport –55 to +80 °C. Degree of pollution 3 (conductive pollution or dry non-conductive that becomes conductive — typical for industrial control panels without sealed enclosures). RoHS compliance with a substance prohibitance date of 03/01/2017.