23www.conesys.com sales@aero-electric.com
38999 S II
– –
MIL-DTL-38999
Performance Specications
Series II
Performance Specications
Operating Temperature Range
Finish B: -65°C to +175°C (-85°F to +347°F)
Finishes C and F: -65°C to +200°C (-85°F to +392°F)
Finish A: -65°C to +150°C (-85°F to 302°F)
Material and Plating Data (Finish)
B – aluminum shell, olive drab cadmium over nickel base
C – aluminum shell, black anodized nish
F – aluminum shell, electroless nickel nish
A – aluminum shell, silver to light iridescent yellow color
(bright) cadmium over electroless nickel base
Corrosion Resistance
Finishes A, B and C withstand 500-hour salt spray.
Finish F withstands 48-hour salt spray.
Durability
Mated connectors withstand a minimum of 250 mating
cycles for RFI plug (MS27484) and 500 cycles for MS27473
and MS27500 plugs.
Environmental Seal
Wired, mated connectors with specied accessories at-
tached, shall meet the altitude-immersion test specied by
MIL-DTL-38999.
Fluid Resistance
Connectors resist specied immersions in MIL-PRF-7808,
MIL-PRF-23699, MIL-PRF-5606, M2-V Chevron oil, Coolanol
25, MIL-DTL-83133 (JP-8), MIL-DTL-5624 (JP-4, JP-5),
SAE-AMS1424 Type I, and other solvents and cleaning agents.
Voltage Rating
Shell-to-Shell Conductivity
Maximum potential drop shall not exceed:
• With RFI spring ngers, nish F = 1.0 millivolt, while
nishes A and B = 2.5 millivolts.
• Without spring ngers = 200 millivolts.
• Finish C = nonconductive.
Shielding Eectiveness
RFI and EMI attenuation at the specied frequencies meet
the requirements of MIL-DTL-38999.
• RFI shielding eectiveness of mated connectors with
RFI backshells is measured in a triaxial radio frequency
leakage xture.
• EMI shielding eectiveness is measured at the interface
of mated connectors and tested by the mode-stirred tech-
nique specied in method 3008 of MIL-STD-1344.
Shock and Vibration Requirements
Wired, mated connectors shall not be damaged, nor shall
there be a current interruption longer than one microsecond
when subjected to the following:
Standard Shock
Mated connectors withstand a pulse of approximate half
sine wave of 300 G magnitude with duration of three
milliseconds applied in three axes per MIL-STD-1344,
method 2004.
Vibration
Mated connectors withstand the following vibration levels:
• Random vibration per MIL-STD-1344, method 2005 test
condition VI, Letter “J”.
Service
Rating
Suggested Operating Voltage Test Voltage Test Voltage Test Voltage Test Voltage
(Sea Level) Sea Level 50,000 Ft. 70,000 Ft. 100,000 Ft.
AC (RMS) DC V RMS V RMS V RMS V RMS
M 400 550 1300 550 350 200
N 300 450 1000 400 260 200
I 600 850 1800 600 400 200
II 900 1250 2300 800 500 200
Note: e establishment of electrical safety factors is le
entirely to the designer, as he is in the best position to know
exactly what peak voltages, switching currents, transients, etc.,
can be expected in a particular circuit.