... +N Hydraulic magnetic mini circuit breaker 3.SX2N CIRCUIT BREAKER 4.SX2N HYMAG TYPE MCB SX2N Hydraulic magnetic circuit breaker is mainly suitable ... comply with IEC 157-1973 BC4752-1977 and BS 3871. SX2N (2P+N) HYDRAULIC MAGNETIC CIRCUIR BREAKER (HYMAG)