This is the Wylex NHXB50 single MCB module single pole Miniature Circuit Breaker Type B 50A 6kA. It is a type B breaker - it will trip between 3 and 5 time full load current, being suitable for most domestic installation. Suitable for the Wylex NH range of consumer units, this is a DIN rail mounted MCB with a positive indication for ON or OFF.
50A B curve NH Miniature Circuit Breaker. This is the Wylex NHXB50 MCB 30mA Single Pole, a single module 50A rated.
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