The Siemens 5SJ3640-7 is a 4-pole (3P+N) SENTRON miniature circuit breaker from the 5SJ3 design family, rated 40 A with a C tripping characteristic. Breaking capacity is 4.5 kA per both EN 60898 and IEC 60947-2 at 400 V AC. Mounting position is any. Installation depth is 70 mm.
Terminal and environment
Solid and stranded conductor range is 0.75 to 25 mm². Sealable terminals support lockout/tagout procedures. Rated for ambient temperatures of -20 to +45 °C, with periodic excursions to +55 °C and 95% humidity. Storage range is -40 to +75 °C. Halogen-free and silicon-free construction — important for environments sensitive to corrosive off-gassing (data centers, clean rooms, marine panels).