Souriau > Mil-DTL-38999 > Series 3 Composites: 8D
milc-38999-ser3-comp

Mil-C-38999 Series 3 Composites: 8D

Description

High density connectors for industrial, military and aeronautical purposes wherever weight savings and severe climatic or mechanical environment are targeted.

Specifications

  • High density connector from 1 to 128 contacts
  • Sizes 22D, 20, 16, 12, #16 coax and #8 triax
  • A quick screw coupling with anti-decoupling mechanism
  • 100% scoop proof
  • An EMI/RFI reinforced shielding with grounding fingers
  • Resistance to salt spray > 2000 hours
  • Endurance > 1500 cycles (mating/unmating)
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Standards

En 3645 (under qualification)
MIL-C 38999 Series III - Issue J

Mechanical Characteristics

  • Weight : typically 25 % lighter than aluminium version
  • Shell : carbon reinforced thermoplastic
  • Plating : olive green cadmium (J) / nickel (M)
  • Insulator : thermoplastic or thermoset
  • Grommet and interfacial seal : silicone elastomer
  • Contact : copper alloy
  • Plating : gold over nickel
  • Endurance : 1500 mating/unmating operations
  • Shock : 300 g - 3 ms EN 2591 - D2 method A
  • Vibration :
    • sine : 10 to 2000 Hz, 3 x 12 hrs (60 g, 140 - 2000 Hz) with temperature cycling.
    • random : 50 to 2000 Hz, 2 x 8 hrs (1g2/Hz, 100 - 2000 Hz) at T Max. 25 to 2000 Hz, 2 x 8 hrs (5g2/Hz, 100 - 300 Hz) at T amb. test with accessories in accordance with EN2591-D3
  • Contact retention :
    • size 22 : 45 N 
    • size 20 : 67 N
    • size 16 : 111 N 
    • size 12 : 111 N
    • size 8 : 111 N

Electrical Characteristics

Test voltage (Vrms)

Service  Sea Level At 21000 m
M 1300 800
N 1000 600
I 1800 1000
II 2300 1000
  • Contact resistance :
    resistance of wire included in measurement :
    • size 22D : 14.6 mΩ
    • size 20 : 7.3 mΩ
    • size 16 : 3.8 mΩ
    • size 12 : 1.7 mΩ
    • size 8 : 3 mΩ
  • Contact rating :
    • size 22D : 5 A 
    • size 20 : 7.5 A
    • size 16 : 13 A 
    • size 12 : 23 A
    • size 8: 45A
  • Insulation resistance : ≥ 5000 MO (at 500 Vdc)
  • Shell continuity :
    • olive green plating : 3 mΩ
    • nickel plating : 3 mΩ
  • Shielding : 90 db at 100 GHz; 85 db at 1 GHz
  • Triaxial contact : # 8
    • bandwidth : 0 - 20 MHz
    • voltage rating : 500 Vac Max. /125 Vac at 21 000 m
    • voltage drop: inner and middle contact ≤ 55 mV, under 1A outer contact ≤ 75 mV under 12 A

Climatic Characteristics

  • Salt spray : 2000 hours
  • Temperature range :
    • cadmium (J) : -65°C +175°C
    • nickel (M) : -65°C +200°C
    • without plating (x) : -65°C +175°C
  • Fire resistance : 
    • Fire exposure during 30 sec. EN2591-C17 method A
  • Damp heat : 
    • 10 cycles in accordance with EN 2591 - C21 
    • altitude-low temperature : 5 cycles (5x44 Hrs ; -65°C min ; -5,5KPa min) EN2591 - C3
  • Sealing : 3 cycles (3x1 Hrs) Altitude immersion 1,1 KPa EN2591 - C14
  • Moisture : exposure during 28 days EN2591 - C6

Resistance to fluids

To MIL-C 38999 :

  • Gasoline : JP5 (OTAN F44)
  • Mineral hydraulic fluid : MIL-H 5606 (OTAN H515)
  • Synthetic Hydraulic Fluid : skydrol 500 B4, LD4 (SAE AS 1241)
    Mineral lubrificating : MIL-L 7870A (OTAN 0142)
  • Synthetic lubrificating : MIL-L 23699 (OTAN 0156), MIL-L 7808
  • Cleaning fluid : MIL-C 25769 diluted
  • De-icing fluid : MIL-A 8243
  • Extinguishing fluid : Chlorobromethane
  • Cooling fluid : Coolanol
  • To NFC 93422
    F46, F54, 0/180, H515, H542, XH45ing : MIL-L 7870A (OTAN 0142)
 
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