What the D-curve and ratings mean for your panel
The Siemens 5SY4406-8 is a 4-pole miniature circuit breaker from the SENTRON 5SY4 series, rated 6 A at 400 V AC with a D-curve tripping characteristic — designed for high inrush loads like motors and transformers. D-curve tripping characteristic suits high inrush loads like motors and transformers. Breaking capacities: 10 kA, 35 kA, 5 kA, and 15 kA at DC.
Dimensions and mounting
Width of 72 mm (4 width units), depth 76 mm, height 90 mm. Mounts via quick-assembly system on DIN rail; installation depth is 70 mm. Any mounting position works, so no de-rating for horizontal orientation. Combined terminals top and bottom accept panel wiring without add-on connectors. Touch protection IP20 with connected conductors keeps fingers away from live parts.
Lifecycle and sourcing
Listed as current production — no end-of-life notice or last-time-buy date in circulation. Sourced to order against an RFQ; quantity and lead time depend on market availability at time of quote. Halogen-free and silicon-free construction, sealable for tamper-evident applications. Suitable for mechanical engineering and general industrial environments per the manufacturer's specification.