MIL-PRF-49465C
3.19 Shock, specified pulse. When resistors are tested as specified in 4.8.13, there shall be no evidence of
breaking or loosening of terminals from the resistor form, chipping of enclosure or other evidence of mechanical
damage. The change in resistance shall not exceed ±(0.1 percent + .0005 ohm). There shall be no electrical
discontinuity during the test.
3.20 Vibration, high frequency. When resistors are tested as specified in 4.8.14, there shall be no evidence of
mechanical damage. The change in resistance shall not exceed ±(0.1 percent + .0005 ohm). There shall be no
electrical discontinuity during the test.
3.21 Life. When resistors are tested as specified in 4.8.15, the change in resistance between the initial
measurement and the succeeding measurements shall not exceed ±(2.0 percent + .0005 ohm). There shall be no
evidence of mechanical damage.
3.22 High temperature exposure. When resistors are tested as specified in 4.8.16, there shall be no damage. The
change in resistance shall not exceed ±(2.0 percent + .0005 ohm).
3.23 Fungus. All external materials shall be nonnutrient to fungus growth or shall be treated to retard fungus
growth. The manufacturer shall verify by certification that all external materials are fungus resistant or shall test the
resistors as specified in 4.8.17. There shall be no evidence of fungus growth on the external surfaces.
3.24 Marking. Resistors shall be marked with the type designation, date code, and source code. Date and source
code shall be in accordance with MIL-STD-1285. At the option of the manufacturer, the PIN number may appear on
two lines. In this event, the PIN shall be divided between the characteristic letter and the last digit of the Department
of Defense specification number. The following is an example of the complete marking:
12345
-
Source code.
9933J
-
Date code.
M4946501
-
Department of Defense specification.
TR0100F
-
Characteristic, resistance type designation, tolerance.
3.24.1 Minimum marking. When the physical size of the resistor style precludes the marking of all the information
cited in the example in 3.24 the minimum marking required shall be as specified in the associated specification sheet
(see 3.1). Marking shall remain legible at the end of all tests. In those cases where full marking requirements are not
on the resistor body, full marking shall be marked on the unit package.
3.25 Use of conductive inks. Conductive inks shall not be used to coat the body of the resistor as preparation for
marking or used for marking of resistors.
3.26 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.27 Workmanship. Resistors shall be processed in such a manner as to be uniform in quality, and shall be free
from holes, fissures, chip, corrosion, and malformation. The terminals shall be unbroken and not crushed or nicked;
and the resistors shall be free from other defects that will affect life, serviceability, or appearance.
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows:
a.
Qualification inspection (see 4.4).
b.
Conformance inspection (see 4.6).
Periodic inspection (see 4.7).
c.
4.2 Test equipment and inspection facilities. The supplier shall establish and maintain a calibration system in
accordance with NCSL Z540-1, ISO 10012-1, or equivalent system as approved by the qualifying activity.
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