Siemens 3VA5330-5EF31-0AA0 MCCB 3P 300A 35kA TM240 Frame 400

The Siemens 3VA5330-5EF31-0AA0 is a SENTRON 3VA5 molded case circuit breaker for UL Frame 400, with breaking capacity class M of 35 kA at 480 V. It is a 3-pole device rated In = 300 A and is supplied without connection.

Line protection is provided by a TM240 thermal-magnetic trip unit of the ATAM type. Overload protection is adjustable from Ir = 240 A to 300 A and short-circuit protection is adjustable from Ii = 5 to 10 x In, so the breaker can be matched to the cable and load actually installed.

The device is supplied as a single piece with a net weight of 4.735 kg in a 261 x 162 x 170 mm carton. Typical applications are main and sub-distribution boards, switchgear assemblies and industrial power distribution where a 300 A three-pole feeder needs reliable overload and short-circuit protection.