... ; 2.Reasonable price,good Stability; 3.Current:63A,100A,160A,250A,630A,1000A,1600A,3150A 4.Pole:3P,4P MGL Isolation-load switch ... type of module design,it has 3poles and 4poles(3poles+switch neutral pole),applied to make and break circuit or electric ... )3P 8.210.417.8 4P4.54.58.711.320.2