Circuit breaker 3VA2 IEC Frame 1250 Switching capacity class H Icu=85kA @ 415 V 4-pole Plant protection ETU350 LSI In=1250A Overload protection Ir=500A Short-circuit protection Isd=15... 10 X Ir Ii=10 x In N-conductor protection adjustable (OFF50%100%) Switch with straight connection extension. Compact circuit breaker SENTRON 3VA2 for effective plant protection through safe disconnection in overload and short-circuit situations. The 3VA compact circuit breakers set standards in flexibility and modular variety while requiring minimal space. The 3VA2 compact circuit breakers are available in 3- and 4-pole versions with various rated currents for installation in fixed mount as well as plug-in technology. The modular and easy-to-install accessories with diverse functions are consistent and uniform across all sizes and series of the 3VA compact circuit breakers. SENTRON Compact Circuit Breakers 3VA - A system. For all applications.