HI-THERM BB-346/A Black Baking Varnish

HI-THERM BB-346/A 

▪ Black impregnating varnish 

▪ Excellent adhesion and flexibility 

▪ Superior heat resistance, suitable up to 215°C 

▪ Suitable for insulating systems in class A, B ,F and H 

▪ Military approved, qualified under MIL-V-1137A, grade CB, type M, and MIL-I-24092,  type M, class 180 ▪ ▪ UL approved (File OBOR2.E317427 and OBJS2.E317429), included in 130°C, 155°C,  180°C, and 220°C insulating systems 

Description HI-THERM BB-346/A Black Baking Varnish is a modified polyester based varnish suitable for the impregnation of  electrical machinery windings in Thermal Classes A, B, F and H. Long use experiences have proven HI-THERM BB- 346/A to have an excellent dip tank stability, even in the worst using conditions. Compatible with the following magnet wires coatings: Amide-Imide, Polyamide, Polyurethane-Polyamide, Polyvinyl  Formal, Polyurethane, Epoxy, Polyvinyl Formal-Polyamide, Polyimide, Textile, Polyester Amide-Imide, Polyester.  HI-THERM BB-346/A has a heat life of 20.000h. at 215°C and of 40.000h. at 205°C as determined by ASTM D-3251  (twisted pairs) specifications, using a polyester amide-imide magnet wire

Applications Impregnation of stators, low speed rotors, transformers, windings, coils.