ABB Protecta Plus S203M-B40 Miniature Circuit Breaker • 3 Pole • 40A Type B • 440V AC / 12V DC • 10kA Breaking Capacity • DIN Rail Mount • System pro M Compact • Industrial MCB • 2CDS273001R0405

THREE-PHASE CIRCUIT PROTECTION – ABB S203M-B40 3-pole 40A miniature circuit breaker protects circuits from overload and short-circuit faults. Designed for DIN rail distribution boards and switchboards in commercial and industrial electrical systems.

TYPE B TRIPPING CURVE – Type B tripping operates at 3–5× rated current, providing fast response to overloads and short circuits. Suitable for circuits with low inrush current such as lighting systems, heating equipment and general electrical loads.

DIN RAIL INSTALLATION – Compact 3-pole breaker mounts on standard DIN rails in switchboards and electrical panels. Screw terminals secure conductors while the contact indicator allows quick visual status checks during operation or maintenance.

10KA BREAKING CAPACITY – Rated 10kA to interrupt high fault currents during overload or short circuit events. Thermal and magnetic trip mechanisms disconnect power quickly to help protect wiring, connected equipment and electrical systems.

ABB PROTECTA PLUS SYSTEM – Part of the ABB Protecta Plus modular distribution system for indoor installations, offering high internal accessibility, removable internal modules for simplified wiring, insulated neutral and earth bars, and an expandable cabinet concept for flexible electrical distribution solutions.