MIL-PRF-39017 Resistors, Fixed, Film \(Insulated\), Nonestablished Reliability, And Established Reliability, General Specification ForThis specification covers the general requirements for nonestablished reliability \(non-ER\) and established reliability \(ER\), insulated, film, fixed resistors. These resistors are capable of full load operation at an ambient temperature of 70 Degrees C and have a resistance temperature characteristic of 100 parts per million \(PPM\) and 350 PPM per degree Celsius \(PPM/Degrees C\). The ER resistors have life failure rate \(FR\) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours \(see 1.2.1.4\). These FR levels are established at a 60 percent confidence level on the basis of life tests. Designers are CAUTIONED on using these resistors in high power pulse applications \(see 6.13.2\).

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-PRF-39017G

4.8.3 DC resistance (see 3.9). Resistors shall be tested in accordance with method 303 of

MIL-STD-202. The following details and exceptions shall apply:

a. Measuring apparatus: Different types of measuring test equipment (multimeters, bridges, or

equivalent) are permitted to use on the initial and final readings of this test, provided the

equipment is the same style, model, or if it can be shown that the performance of the equipment

is equivalent to or better.

b. Measure energy for electronic test equipment: The measure energy applied to the unit under test

shall not exceed 10 percent of the 25�C rated wattage times 1 second.

Test for bridges: Measurements of resistance shall be made using the test voltages specified in

table XV. The test voltage chosen, whether it is the maximum or a lower voltage which would still

provide the sensitivity required, shall be applied across the terminals of the resistor. This same

voltage shall be used whenever a subsequent resistance measurement is made.

d. Temperature: The dc resistance test specified in group I of table IX shall be performed at 25�C

�2�C. For all other tests, unless otherwise specified herein, the temperature at which subsequent

and final resistance measurements are made shall be within �2�C of the temperature at which

the first resistance measurement was made.

TABLE XV. DC resistance test voltages.

Resistance, nominal

Test potential

Volts

Ohms

4.3 to

9.1 inclusive

.0043 to .1 inclusive

10 to

91 inclusive

0.5 to 1 inclusive

100 to

910 inclusive

2.5 to 3 inclusive

1,000 to 9,100 inclusive

8 to 10 inclusive

10,000 to 91,000 inclusive

24 to 30 inclusive

0.1 megohms or higher

80 to 100 inclusive

4.8.4 Thermal shock (see 3.10). Resistors shall be tested in accordance with method 107 of

MIL-STD-202. The following details and exceptions shall apply:

a. Special mounting:

(1) Qualification inspection: Resistors shall be mounted by means other than soldering.

(2) Conformance inspection: Resistors shall be mounted by means other than soldering or may

be placed in trays. When trays are used, they must be designed to present a minimum of

obstruction to the airstream. In no case shall the fixture prevent the specified ambient

temperature from being achieved within 4 minutes after resistors are placed in chamber.

b. Measurements before cycling: DC resistance shall be measured as specified in 4.8.3.