The Siemens 5SL6440-6RC is a SENTRON miniature circuit breaker rated 40 A at 415 V AC, 4-pole, with a B tripping characteristic and a 7.5 kA breaking capacity certified to EN 60898. Rated voltage for multi-phase operation is 440 V AC maximum; single-phase is 250 V AC. DC rating is limited to 60 V maximum — this is an AC-optimised breaker, not a general-purpose DC device. The 4-pole design (4P) switches all four poles simultaneously; neutral conductor switching is not provided.
Mounting and integration — DIN-rail footprint
Tightening torque is 2.5 to 3 N·m for screw-type terminals. The breaker is sealable and halogen-free, silicon-free — relevant for environments sensitive to outgassing (e.g., clean rooms, medical equipment).
Lifecycle and sourcing — active production, documented compliance
Compliance documentation for this SENTRON series includes a declaration of conformity to EN 60898, CE marking, and the manufacturer's RoHS and REACH statements. The 7.5 kA rating is certified per EN 60898; overvoltage category 3 and pollution degree 2 are typical for fixed-installation MCBs. No UL or CSA listing is cited in the evidence — confirm with your local Siemens representative if a UL 489 version is required for North American installations.