MIL-DTL-38999 Series I Connectors Datasheets

MIL-DTL-38999 Series I Connectors Datasheets and Specifications
Circular Connector (Military Connector)

The Amphenol & Souriau Compatible MIL-DTL-38999 series I connector circular connector is engineered for rapid bayonet-style coupling, featuring both soldered and removable crimp contacts. It offers superior environmental resilience, effective EMI/RFI shielding, and high contact density in a compact, lightweight design. Built to endure vibrations and prevent scoop damage, it ensures reliable hermetic sealing when mated. This series is available in three different shell materials, with nine shell sizes, three finish options, and five receptacle-mounting styles. There are also five contact types and over 60 different contact layouts to choose from.

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MIL-DTL-38999 Series I Connectors Datasheets
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    MIL-DTL-38999 Series I

    Part number

    MS      27466      E      19      B      35      P N

    Basic series

    Type of connector

        27467 = Straight plug

       27466 = Wall mounting square receptacle, front 

       27656 = Wall mounting square receptacle, rear

       27496 = Box square receptacle, front 

       27505 = Box square receptacle, rear 

       27468 = Jam nut receptacle

    Shell

       T = With thread and accessory

       E = Without thread or accessory

    Shell size

        09, 11, 13, 15, 17, 19, 21, 23, 25

    Finish 

        B = Olive green cadmium plating 

        C = Black anodized 

        E = Passivated stainless steel 

        F = Bright electroless nickel plating

    Contact layout (See below)

    Type of contact 

        P = Crimp pin

        S = Crimp socket 

        PH = Solder pin 

        SH = Solder socket 

        PL = Long PCB pin 

        PC = Short PCB pin 

        SL = Long PCB socket 

        SC = Short PCB socket

    Orientation

        N = Normal 

        A, B, C, D = Alternative

    Electrical

       Contact resistance and current rating:

    Contact No. Diameter (mm) Resistance (mΩ) Current (A)
    22D# Φ0.76 ≤12.0 5.0
    20# Φ1.00 ≤5.0 7.5
    16# Φ1.60 ≤2.5 13.0
    12# Φ2.40 ≤1.5 23.0
    10# Φ3.15 ≤1.0 40.0

    EMI shielding: 

        100MHz~1GHz: minimum attenuation 85dB 1GHz~10GHz: minimum attenuation 50dB

    Withstanding voltage (V):

    Service rating M N I II
    Sea level 1300 1000 1800 2300
    21000m 800 600 1000 1000

    Insulation resistance:

        Normal ≥ 5000MΩ, damp heat ≥ 100MΩ

    Electrical continuity between shells: 

        Class B ≤ 2.5mΩ, class F ≤ 1.0mΩ, class E ≤ 5.0mΩ

    Mechanical

        Shell material:

        Aluminium alloy, stainless steel or copper-alloy

    Plating: 

        Class B: Olive green cadmium plating  

        Class E: Passivated stainless steel 

        Class F: Electroless nickel plating

        Class C: Anodize 

    Insulator:  

        Thermo-set plastic or PBT

    Grommet and seal:  

        Silicon rubber

    Contact: 

        Copper alloy gold plating, crimp or PCB

    Endurance:  

        500 cycles

    Vibration: 

        Sinusoid vibration: frequency: 10~2000Hz, acceleration: 294m/s2 

        Random vibration: at frequency: 100~1000Hz, density of power chart: 1G2 /Hz

    Shock: 

        At 3 ms half sinusoid, peak value of acceleration: 300g

    Environmental

        Operating temperature:

            Class B: -65oC ~ +175oC  

            Class C, E, F: -65oC ~ +200oC 

        Salt spray:  

            Class B, E: 500h

            Class F: 48h

       Relative humidity: 98% at 40oC  

       Operating height: ≤ 30480m

    Contact layout

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