MIL-DTL-24640/1E
REQUIREMENTS:
Qualification required.
Construction details: See table I.
Component wire: The component wire shall be in accordance with SAE-AS81044 and shall be tested in
accordance with the following wire ratings and additional requirements.
Temperature rating
150 °C (302 °F) (max.) conductor temperature
Voltage rating
600 volts (root mean square) at sea level
Accelerated aging
Non-blocked
Oven temperature, 300±2 °C (572±3.6 °F) for 6 hours
Water-blocked
Oven temperature, 250±2 °C (482±3.6 °F) for 6 hours
Blocking
150±2 °C (302±3.6 °F)
Flammability
30 seconds (max.)
3.0 inches (max.)
No flaming of tissue paper
Humidity resistance
5000 megohms for 1000 feet (min.) insulation resistance after
humidity exposure
Dielectric test (100% test)
Primary insulation
Impulse test - 6.0 kV (peak) or 3 kHz spark test - 1.5kV root
mean square
Component wire
Impulse test - 8.0 kV (peak) or 3 kHz spark test - 5.5kV root
mean square
Insulation resistance
5000 megohms for 1000 feet (min.)
Life cycle
Non-blocked
Oven temperature, 200±2 °C (392±3.6 °F) for 168 hours
Water-blocked
Oven temperature, 200±2 °C (392±3.6 °F) for 120 hours
Physical properties of primary insulation:
2500 lb/in2 (min.)
Tensile strength
Elongation
150 percent (min.)
Shrinkage
Non-blocked
0.125 inch (max.) at 300±2 °C (572±3.6 °F)
Water-blocked
0.125 inch (max.) at 250±2 °C (482±3.6 °F)
Surface resistance
500 megohms inches (min.), initial and final readings
Thermal shock
Oven temperature, 150±2 °C (302±3.6 °F)
Maximum change in measurement
0.060 inch
2
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