Souriau > Mil-DTL-38999 > series 3 (8D)
milc-38999-ser3-8d

Mil-C-38999 Series 3: 8D

Description

High density connectors for all military and aeronautical purposeswith severe vibration environment.

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
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Standards

MIL-C 38999 Series III - QPL approved
Pr EN 3645

Mechanical Characteristics

  • Shell : aluminium alloy
  • Plating :
    • olive green cadmium (W)
    • nickel (F)
  • Insulator : thermoplastic or thermoset
  • Grommet and seal : silicone elastomer
  • Contact : copper alloy
  • Plating : gold over nickel
  • Endurance : 500 mating/unmating operations
  • Vibration :
    • sine 10 to 2000 H 30 g
    • random:
      • 44.1 grms at high temperature
      • 49.5 grms at ambient temperature
  • Contact retention : (mini force in N)
    • size 22 D : 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 16 : 3.8 mΩ
    • size 20 : 7.3 mΩ
    • size 12 : 1.7 mΩ
    • size 8 : 3 mΩ
  • Insulation resistance : ≥ 5000 MΩ (at 500 Vdc)
  • Contact rating :
    • size 22D : 5 A
    • size 16 : 13 A
    • size 20 : 7.5 A
    • size 12 : 23 A
    • size 8: 45A
  • Shell continuity :
    • olive green plating : 2.5 mΩ
    • nickel plating : 1 mΩ
  • Shielding :
    • 65 db to 10 GHz (F)
    • 50 db to 10 GHz (W)
    • 85 db to 1 GHz (F and W)
  • Triaxial contact : # 8
    • bandwidth : 0 - 20 MHz
    • voltage rating : 500 Vac maxi.
  • 125 Vac at 21000 m
    • voltage drop :
      inner and middle contact ≤ 55 mV under 1A
      outer contact ≤ 75 mV under 12A

Climatic Characteristics

  • Temperature range :
    • cadmium plating (W) : -65°C +175°C
    • nickel plating (F) : -65°C +200°C
  • Sealing : mated connectors meet altitude immersion requirements of MIL-C 38999
    • differential pressure 2 bars
    • leakage = 16 cm3/hr
  • Salt spray to :
    MIL STD 1344 method 1001
    • 500 hours (version W)
    • 48 hours (version F)
  • Damp heat :
    MIL-C 38999 : 10 cycles 24 hrs

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
 
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