The Siemens 5SL6404-8CC is a 4-pole miniature circuit breaker from the SENTRON 5SL6 family of Basic Devices, rated 4 A with a D tripping characteristic at 400 V AC and a 6 kA breaking capacity.
RoHS compliance is confirmed effective 01 June 2013, and REACH Article 33 candidate-list disclosure is on file. No UL or CSA listing is stated in the available data, so verify local code acceptance if the installation falls under a North American inspection jurisdiction.
The 4-pole body occupies four modular width units (4 x 18 mm). Spring-cage or screw terminals accept copper conductors up to 25 mm², depending on the terminal variant — check the specific terminal marking on delivery. The D-curve characteristic means this breaker is sized for loads with repetitive high inrush, not for resistive heater banks where a B- or C-curve would be the better selectivity match.