... low temperature resistance 2,electricity insulativity radiation 3,etching resistance 4,corona resistance 5,therma Corona Resistance Polyimide FilmIn ... , external insulation of big coil and corona resistance protective layer of large tractive motor, conversion ... No.IndexUnitValueTY6051-CRTY6251-FCRSingle sideTY6251-FCRDouble sides1Corona resistance periodPulse frequency:20KHz:Pulse rate factor:50 ...