DIN rail form factor and panel fit
The 2CDS251103R0064: This 2-pole MCB occupies a standard 35 mm width on the DIN rail, with an 88 mm height and 69 mm depth — the envelope fits a standard distribution board cutout without crowding adjacent ways. The IP20 rating on the front face means it is protected against finger contact; the IP40 rating on the enclosure body keeps out tools and small wires, which is the norm for enclosed panel mounting.
Breaking capacity and trip coordination
Rated short-circuit breaking capacity Icn is 6 kA per IEC 60898 — this is the service breaking capacity for a domestic or light commercial distribution board. The ultimate breaking capacity Icu is 20 kA per IEC 60947-2, meaning the MCB can safely interrupt a 20 kA fault once without needing replacement, which is relevant when the device is applied in an industrial panel with higher prospective fault current. The C-trip characteristic means the magnetic release trips at 5 to 10 times rated current — suited for circuits with moderate inrush, such as small motor loads or lighting banks with capacitive drivers.
Installation class and terminal design
Overvoltage category III means this MCB is rated for fixed installation downstream of the main distribution board — it can handle transient overvoltages typical of building wiring without additional surge protection. Rated insulation voltage is 440 V, which covers 230/400 V three-phase systems with margin. The bi-directional cylinder-lift terminal accepts both solid and stranded copper conductors up to the rated cross-section, with a max tightening torque of 2.8 Nm.