Siemens 5SY4206-7CV MCB, 15kA Icu 400V 2P C6

The Siemens 5SY4206-7CV is a 2-pole miniature circuit breaker (MCB) with a C6 tripping characteristic and a rated ultimate breaking capacity (Icu) of 15 kA at 400 V AC. That 15 kA rating means it can safely interrupt a fault current up to that level without welding its contacts or failing catastrophically — critical for installations where the prospective short-circuit current at the panel is high. The C-curve (6x to 10x In) is the standard choice for general-purpose loads like contactors, relays, and small motor circuits where you need moderate inrush tolerance without nuisance tripping.