The Siemens 5SL6450-6RC is a 50 A, 4-pole miniature circuit breaker with B characteristic and a 7.5 kA breaking capacity. It's part of the Basic Devices family, built for DIN-rail mounting in distribution panels where you need overcurrent and short-circuit protection for general-purpose branch circuits. The B characteristic means the magnetic trip fires at 3 to 5 times rated current — good for resistive and lighting loads where inrush isn't extreme. At 50 A per pole, it handles a solid feeder or a big submain without derating headaches.
Sourcing and lifecycle
RoHS compliance dates from 05-08-14, and the REACH Article 33 declaration notes lead (CAS 7439-92-1) above the 0.1% threshold. That matters for environmental reporting and end-of-life documentation in regulated industries.
Panel integration
Snaps onto standard 35 mm DIN rail. Four poles in a single module width per pole — typical Siemens 5SL series footprint. When you're packing a distribution board, the 7.5 kA breaking capacity at 230/400 V gives you enough fault clearance for most commercial and light industrial sub-distribution without needing an upstream current-limiting device.