, nonestablished reliability, established reliability, and space level, fixed, film, resistors. Designers are CAUTIONED on using these resistors in high power pulse applications \(see 6.9\).

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MIL-PRF-55182/9G

3.3 Resistance. Resistance limits shall be as follows:

Minimum - 4.99 ohms

Maximum - 200 kilohms

3.4 Power rating. The power rating shall be 0.30 watt (see 6.4).

3.5 Voltage rating. The maximum continuous working voltage shall not exceed 300 volts.

3.6 Thermal shock. When resistors are tested as specified, there shall be no evidence of mechanical damage; the

change in resistance shall not exceed �.05 percent for thermal shock and overload tests combined.

3.7 Overload. When resistors are tested as specified with overload of 6.25 times rated power for 5 seconds, there

shall be no evidence of arcing, burning, or charring; the change in resistance shall not exceed �.05 percent for

thermal shock and overload tests combined (see 3.6). The maximum voltage shall not exceed 450 volts.

3.8 Low temperature operation. When resistors are tested as specified, there shall be no evidence of mechanical

damage. The change in resistance shall not exceed �.05 percent.

3.9 Terminal strength. When resistors are tested as specified in 4.2, there shall be no evidence of breaking or

loosening of terminals from the resistors form, or chipping of coating, or other evidence of mechanical damage. The

change in resistance shall not exceed �.02 percent.

3.10 Dielectric withstanding voltage. When resistors are tested as specified in 4.3, there shall be no evidence of

flashover, mechanical damage, arcing, or insulation breakdown. The change in resistance shall not exceed �.02

percent.

3.11 Resistance to soldering heat. When resistors are tested as specified, there shall be no evidence of

mechanical damage. The change in resistance shall not exceed �.02 percent.

3.12 Moisture resistance. When resistors are tested as specified in 4.4, there shall be no evidence of mechanical

damage. The change in resistance shall not exceed �.05 percent. In addition, the dielectric withstanding voltage

shall be as specified in 3.10, and the insulation resistance shall be 100 megohms, minimum.

3.13 Shock (specified pulse). When resistors are tested as specified, there shall be no evidence of mechanical or

electrical damage. The change in resistance shall not exceed �.01 percent. There shall be no electrical discontinuity

during the test.

3.14 Vibration, high frequency. When resistors are tested as specified, there shall be no evidence of mechanical

damage. The change in resistance shall not exceed �.02 percent. There shall be no electrical discontinuity during

the test.

3.15 Life.

3.15.1 Qualification. When resistors are tested as specified, there shall be no evidence of mechanical damage to

the resistance element or enclosure. The change in resistance between initial measurement and any of the

succeeding measurements up to and including 2,000 hours shall not exceed �.05 percent.

3.15.2 Product level determination. When resistors are tested as specified, there shall be no evidence of

mechanical damage to the resistance element or enclosure. The change in resistance between the initial

measurements and any of the succeeding measurements shall not exceed �.5 percent. This single failure criteria

shall be applicable to all measurements during the life test for purposes of determining failure-rate level qualification

and is applicable as a parallel requirement with 3.15.1 to the measurements made during the life test specified for

qualification inspection.