The Siemens 5SL6150-6BB is a 1-pole miniature circuit breaker (MCB) with a B tripping curve, rated 50 A at 230/400 V AC with a 6 kA breaking capacity. It's the Italy-market version of the standard 5SL series.
The 50 A rating on a 1-pole B-curve suits main incomers in sub-distribution boards feeding lighting, socket outlets, or small resistive loads.
