The ABB 2CDS251001R0064 is a 1-pole S200 miniature circuit breaker with a C tripping curve rated at 6 A. It sits on a standard DIN rail and occupies one 17.5 mm module — useful to know when you're filling a crowded panel and every slot counts. The C-curve characteristic means the magnetic trip threshold is 5 to 10 times rated current, so it's sized for inductive loads like small motor starters, contactor coils, and lighting banks where inrush is higher than a resistive load. The 6 A rating handles branch circuits up to that continuous current. Breaking capacity is the real fit question here: Icn (rated short-circuit capacity per IEC 60898) is 6 kA, enough for most final subcircuits in a commercial or light industrial panel. Icu (ultimate breaking capacity per IEC 60947-2) is 20 kA, which tells you the breaker can clear a much larger fault once — that's the headroom for selectivity with an upstream device. Overvoltage category III confirms it's rated for fixed-installation use downstream of the main distribution board.
Panel fit and environment
Mounts on a standard 35 mm DIN rail. The 17.5 mm width per pole is the standard module size, so you can stack it alongside other S200 breakers or accessories without odd gaps. IP20 at the terminals (finger-safe) and IP40 at the front face — fine for a dry indoor enclosure, but not rated for washdown or outdoor exposure. Screw terminals accept up to 2.8 Nm tightening torque — that's roughly the spec for a 2.5 mm² to 4 mm² copper conductor. The bidirectional cylinder-lift terminal design gives you a clean connection from either side, which speeds up wiring when you're landing multiple breakers in a row.