MIL-DTL-55302/77D
Requirements:
Dimensions and configuration: See figure 1 and table I.
Material: In accordance with MIL-DTL-55302.
Plating: The contact plating shall be gold in accordance with ASTM B488, type II, code C, class 1 over 100
microinches of copper in accordance with SAE-AMS-2418.
Contact identification: Numerals shall be molded as follows, front face: End of contact rows, 1, 29, 30, 58 on -01
and 1, 29, 58, 87 on -02.
Mating and unmating: The maximum mating force, in pounds, shall not exceed a value equal to 0.5 times the
number of contacts, and the withdrawal force, in pounds, shall be a minimum of 0.08 times the number of contacts
and shall not exceed the measured insertion force.
Contact resistance: The average resistance of all contact pairs measured shall not exceed 0.010 ohm, and no
individual contact pair shall have a resistance exceeding 0.020 ohm.
Dielectric withstanding voltage:
Sea level: 1,300 volts rms, 60 Hz, ac.
High altitude: 325 volts rms, 60 Hz, ac.
Pin size: 22.
Mating connectors: See MIL-DTL-55302/76.
Current rating: 3.0 amperes maximum.
Insert arrangement: See figure 2.
Part or Identifying Number (PIN): M55302/77-(dash number from table I).
TABLE I Dash number and dimensions.
Dimensions 1/
Dash
number Number
A
B
C
D
E
F
Weight pounds
of
max
contacts
+.000
±.005
+.004 (0.10)
+.005 (0.13)
+.004 (0.10)
+.004
-.005
(0.13)
-.005 (0.13)
-.000
-.005 (0.13)
(0.10)
(0.13)
.355
.266
.153
.246
.092
.260
.020
01
58
(9.02)
(6.76)
(3.89)
(6.25)
(2.34)
(6.60)
(9.07 grams)
.455
.366
.253
.346
.142
.356
.028
02
87
(11.56)
(9.30)
(6.43)
(8.79)
(3.61)
(9.04)
(12.70 grams)
1/ Metric equivalent are given for information only. Millimeters are in parentheses.
3
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