Souriau > Mil-DTL-38999 > Series 3 Firewalls
milc-38999-ser3-comp

Mil-C-38999 Series 3 Firewalls

Description

High density stainless steel connectors for industrial, military and aeronautical purposes

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 classes K & S
QPL approved

Mechanical Characteristics

  • Shell : - Stainless steel
  • Plating : - Nickel
    • Passivated
  • Insulator : thermoplastic
  • Grommet and interfacial seal : silicone elastomer
  • Contact : copper alloy
  • Plating : gold over nickel
  • Endurance : 500 cycles
  • Shock : 300 g during 3 ms and MIL-S901 grade A
  • Vibration :
    • sine 10 to 2000 Hz 30 g
    • random 100 to 300 Hz 5 (g2/Hz)
  • Contact retention :
    • size 22 : 45 N 
    • size 20 : 67 N
    • size 16 : 110 N 
    • size 12 : 110 N
    • size 8 : 110 N

Electrical Characteristics

Test voltage (Vrms)

Service  Sea Level At 21000 m
M 1300 800
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
  • Contact rating :
    • size 22D : 5 A 
    • size 20 : 7.5 A
    • size 16 : 13 A 
    • size 12 : 23 A
  • Insulation resistance : ≥ 5000 MΩ (at 500 Vdc)
  • Shell continuity :
    • nickel plating : 1 mΩ
  • Shielding : 90 db at 100 GHz; 50 dB to 10000 MHz
  • 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

  • Temperature range :
    • nickel (M) : -65°C +200°C
  • Sealing: mated connectors
    • differential pressure 2 bars
    • leakage ≤ 16 cm3/hr
  • Salt Spray to : 
    • MIL STD 1344 method 1001 48 hours
  • Damp heat : 
    • MIL-C 38999 : 10 cycles 24 hours
  • Fire test : to MIL-C 38999

Resistance to fluids

To MIL-C 38999 :

  • MIL-L 7808
  • MIL-L 23699
  • MIL-H 5606
  • MIL-A 8243
  • MIL-C 25769
  • MIL-T 5624 (JP5)
  • hydraulic fluids
  • solvents
 
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