These main contact sets are electrical replacement contacts or repair kits for Mitsubishi S-N series motor starter and contactors.They are packaged at 3poles(3 movable kits and 6 stationary kits plus spring clips and screws.
Here is the part number list of replacement contact kits&repair kits for Mitsubishi S-N series contactor:
BH739N300 used for Mitsubishi S-N20 contactor
BH749N300 used for Mitsubishi S-N25 contactor
BH749N301 used for Mitsubishi S-N35 contactor
BH759N300 used for Mitsubishi S-N50 contactor
BH769N300 used for Mitsubishi S-N80 contactor
BH769N301 used for Mitsubishi S-N95 contactor
BH779N300 used for Mitsubishi S-N125 contactor
BH789N300 used for Mitsubishi S-N150 contactor
BH799N300 used for Mitsubishi S-N180 contactor
BH799N301 used for Mitsubishi S-N220 contactor
BH609N300 used for Mitsubishi S-N300 contactor
BH609N301 used for Mitsubishi S-N400 contactor
