The 5SY4606-6 is a Siemens SENTRON miniature circuit breaker in a 3P+N four-pole configuration — three protected phases plus a switched neutral. Rated operational voltage is 400 V AC (440 V max multi-phase), with a DC rating of 60 V (72 V max). The neutral is switched for full isolation on all four poles.
The combined top and bottom terminals let you feed from either end without reconfiguring the busbar. Pollution degree 3 means it tolerates conductive dust and humidity typical of factory floors. The humidity derating curve caps relative humidity at 95% up to 55 °C, then drops to 35% at 75 °C — relevant if the panel sits near a heat source. Temperature range spans -40 to 75 °C, so it works in cold storage or hot machine cabinets without derating the thermal-magnetic trip.
Approvals cover IEC/EN 60898-1 for general distribution, IEC/EN 60947-2 for industrial switchgear, and UL 1077 for North American supplementary protection.