Material Operating Temperature Insulation Resistance (I.R.) D.F. Test Surge Voltage Metallized Poly phenylene Sulfide -55°C to +125°C (50-100V) 25,000 Megohms/ mfd. Not to exceed 50,000 Megohms (200V + ) 50,000 Megohms / mfd. Not to exceed 100,000 Megohms < 0.15% at 1 Khz and at +25°C 150% of the rated Voltage Poly phenylene Sulfide / Foil -55°C to +125°C 100,000 Megohms/ mfd. Not to exceed 200,000 Megohms < 0.15% at 1 Khz and at +25°C 200% of the rated Voltage