MIL-DTL-38999 III series circular composite material connector
1. military standard MIL-DTL-38999K
2. tri-start coupling
MIL-DTL-38999 III series circular composite material connector
A. Brief Introduction
This series of connector follows the military standard MIL-38999K (Chinese military standard GJB599A). It is designed as tri-start coupling, crimping contact and small size.
B. Specification
1. Operating temperature:
J class: -65 oC ~ +175 oC
M class: -65 oC ~ +200 oC
2. Salt spray
According to method from MIL-DTL-38999, 2000h
3. Seal
Comply with the request of MIL-DTL-38999K low-pressure immersion.
4. Damp heat
10 cycles in 24 hours according to MIL-DTL-38999K
5. Fluid resistant
Various fuels, coolant and solvent
6. Contact resistance & Current rating
Contact ID | Diameter (mm) | Resistance (mΩ) | Current (A) |
22D# | Φ 0.76 | ≤ 12 | 5.0 |
20# | Φ 1.00 | ≤ 5.0 | 7.5 |
16# | Φ 1.60 | ≤ 2.5 | 13.0 |
12# | Φ 2.40 | ≤ 1.5 | 23.0 |
10# | Φ 3.15 | ≤ 1.0 | 40.0 |
7. EMI shielding:
1GHz ~ 100GHz: minimum attenuation 90dB
100MHz ~ 1GHz: minimum attenuation 85dB
8. Withstanding voltage(V)
Service rating | Sea level | 21000m |
M | 1300 | 800 |
N | 1000 | 600 |
I | 1800 | 1000 |
II | 2300 | 1000 |
9. Insulation resistance:
At 500Vdc, ≥ 5000MΩ
10. Electrical continuity between shells:
≤ 3.0mΩ
11. Shell: Composite material
12. Plating:
J class: Olive green cadmium plated
M class: Electroless nickel plated
13. Insulator: Thermo-set plastic
14. Grommet and seal: Silicon rubber
15. Contact: Copper alloy with gold plated
16. Endurance: ≥ 1500 cycles
17. Shock
At 3 ms half sinusoid, peak value of acceleration: 300g
