The Siemens 5SJ6440-6RC is a 4-pole miniature circuit breaker from the 5SJ6 Retail Line, rated 40 A with a B tripping characteristic and 6 kA breaking capacity. The 4-pole format handles three-phase plus neutral, common in commercial distribution boards and smaller sub-mains.
Siemens 5SJ6440-6RC MCB 4P 40A B-Curve 6kA
MPN5SJ6440-6RC
Siemens 5SJ6 Retail Line MCB, 4-pole, 40 A, B characteristic, 6 kA breaking capacity.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
What is the breaking capacity of the 5SJ6440-6RC?
Rated 6 kA breaking capacity at 40 A — suitable for final sub-circuits where prospective fault current stays below that threshold.
MPN
5SJ6440-6RC