This is a Wylex MCB.\r\nAn MCB is a Mini Circuit Breaker and is commonly used.\r\nThis Wylex is a single pole unit.\r\nThis Wylex uses works at 40 amps.\r\nThis Wylex MCB will work on a circuit with a 230-240V supply.\r\nThis is a type B Wylex MCB.\r\nThis Wylex is part of the NH distribution boards and is designed to cater to all kinds of needs, whether it be industrial or commercial.\r\nThis 40A Wylex single pole MCB is included in our one-year guarantee, as are all of our products on our website electricals247.co.uk.