Railway-rated MCB for 3+N-pole distribution
The Siemens 5SY4606-7CC11 is a 3+N-pole miniature circuit breaker rated 6 A with a C-trip curve, designed for 400 V AC systems and a 10 kA breaking capacity. The C-curve (trips at 5–10× In) handles moderate inrush from transformer or small motor loads common in railway auxiliary circuits. The 3+N configuration switches all three phases and switches the neutral — typical for TN-S or TN-C-S systems where neutral isolation is required.