MIL-DTL-55302/166B
REQUIREMENTS
Dimensions and configuration: See figure 1 and tables I and II.
PCB contacts: All PCB contacts shall contain 7 brush wires with a tolerance limit of ± 1. Each
brush wire diameter shall be .0073 to .0085 inch (0.185 mm to 0.216 mm).
Material:
Body: Glass filled thermoplastic molding material in accordance with ASTM D5948, type GPT-15F.
Contacts: In accordance with MIL-DTL-55302, ASTM B187 or ASTM B272.
Plating: The contact termination plating shall be in accordance with table III. Brush wire plating shall
be gold in accordance with ASTM B488, type II, code C, class 1.27 over nickel in accordance with
SAE-AMS-QQ-N-290. Cut ends or brush wires need not be plated.
Contact identification: See figure 1 (note 8) and figure 2.
Oversized pin exclusion: Not applicable.
Contact engagement and separation forces: Not applicable, see mating and unmating.
Mating and unmating: The maximum mating and unmating force shall be 1.5 ounces times the total
number of contacts.
Contact current rating: The connector may have any combination of current flow and ambient
temperature provided the contact or connector temperature does not exceed 125°C. The test current
shall be 5 amperes for individually connected contacts and 3 amperes for series wired contacts.
Contact resistance: The average resistance of all contact pairs measured on row A contacts shall not
exceed 0.016 ohm, and no individual pair shall have a resistance exceeding 0.020 ohm. To allow for
increased terminal lengths, add 0.001 ohm for each contact row beyond row A. The point of
measurement shall be the point of terminal exit from the printed wiring board.
Contact retention: 3 pounds per contact minimum when the force is applied in the forward direction.
The displacement shall not exceed 0.005 (0.13 mm). The displacement shall be recorded after a 1
pound preload is used to determine the zero displacement reference.
Vibration: Vibration shall be in accordance with MIL-DTL-55302 except test condition V, letter H shall
apply. Duration shall be 4 hours in each of three mutually perpendicular directions, 12 hours total.
Dielectric withstanding voltage:
Sea level: 1,300 volts rms, 60 Hz, ac.
High altitude: 325 volts rms, 60 Hz, ac.
Extended contact life: Connector shall meet the performance requirements of MIL-DTL-55302, contact
life, when subjected to 20,000 insertion and withdrawal cycles during qualification inspection.
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