Breaking capacity and what it means for your panel
The 20 kA Icu tells you this MCB can handle a higher prospective fault level than its Icn suggests, so it's suitable for sub-distribution where the available fault current may exceed 6 kA but the breaker is backed by a current-limiting fuse or upstream MCCB.
C-curve and deployment context
The C-curve trips magnetically at 5 to 10 times rated current (30–60 A for this 6 A unit). That's the standard choice for circuits with moderate inrush — think contactor coils, small transformers, or groups of LED drivers.
At 35 mm wide (2 modules on a DIN rail), 88 mm tall, and 69 mm deep, this breaker occupies the same footprint as every other S200-series 2-pole MCB. The 69 mm depth is measured from the DIN-rail mounting surface to the front of the toggle — important when calculating enclosure fill against a gland plate or door-mounted equipment. The screw terminals accept a tightening torque up to 2.8 Nm, which is typical for a 6 A rated terminal and sufficient for 2.5 mm² copper conductors.