MIL-DTL-28748D
TABLE VI. Low level circuit.
Wire
Initial
After
After
Initial
size
potential
conditioning
conditioning
contact
awg
drop (max)
voltage (max)
resistance
resistance
(volts)
(volts)
(max)(ohms)1/
(max)(ohms)1/
5 mΩ
5 µV
60 mΩ
6 µV
16
9 mΩ
9 µV
11 mΩ
11 µV
20
15 mΩ
15 µV
17 mΩ
17 µV
22
1/ Test current shall be .001 amperes.
3.5.15 Resistance to test probe damage (for nonremovable contacts). When tested as specified in 4.7.17, socket contacts shall
withstand the bending moment and depth of test probe insertion without evidence of visible damage. In addition, socket contacts
shall meet the requirements of 3.5.16.
3.5.16 Contact separating forces (nonremovable contacts). When socket contacts are tested as specified in 4.7.18, the forces
required to withdraw the pins shall be in accordance with table VII.
TABLE VII. Contact separating forces. 1/
Contact
Maximum force
Minimum force
size
ounces (Newton)
ounces (Newton)
0.5 (0.14)
22
9.0 (2.50)
0.75 (0.75)
20
16.0 (4.45)
2.0 (0.56)
16
20.0 (5.56)
1/ Metric equivalents are given for general information only.
3.5.17 Industrial gas. When tested as specified in 4.7.20, unmated contacts shall withstand industrial gas conditioning for 100
hours and show no evidence of damage that would interfere with the mechanical or electrical performance.
3.5.18 Solderability. Solderable, nonremovable contact terminations shall withstand the test specified in 4.7.21, unless solder cup
terminations are specified. For solder cup terminations, individual contacts may be removed from the insulator or an alternate
method using a hand iron may be used on the contacts in an assembled (non-removed) configuration.
3.5.19 Resistance to soldering heat. When tested in accordance with 4.7.22, the connectors shall be visually inspected and shall
show no evidence of distortion or physical damage and shall meet the contact retention requirements of 3.5.4 and dimensional
requirements of 3.3.5.
3.5.20 Resistance to solvents. When tested in accordance with 4.7.23, the connectors shall be visually inspected and shall show
no evidence of cracking, crazing, discoloration, distortion or bleeding out of any foreign matter from the material. Pitting shall not be
allowed. The marking and color coding shall be legible.
3.5.21 Contact pin strength. Contact pin strength shall be tested in accordance with 4.7.24, with the forces specified in table VIII.
The force shall not produce a permanent set in excess of .005 inch (0.13 mm).
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