Europa 2 pole rcbos 6ka 30ma b curve din rail mount europa components eublm6b30 this 6a 2 pole rcbo is a combination of mcb rcd the unit has a rated residual operating current of 30ma a rated short circuit capacity of 6ka and a b characteristic curve designed for din rail mounting in consumer units and three phase distribution boards and will also retrofit in a consumer unit when the extra protection of an rccb is required europa components eublm6b30 double pole rcbo 6ka 30ma b curve 6