MIL-DTL-38999 II series military circular connector
1. military standard MIL-DTL-38999K
2. bayonet coupling
MIL-DTL-38999 II series military circular electrical connector
A. Brief Introduction
This series of connetor follows the military standard MIL-DTL-38999K (Chinese military standard GJB599A). It is designed as bayonet quick coupling, crimp contact and small size.
B. Specification
1. Contact resistance and current rating:
Contact ID | Diameter (mm) | Resistance (mΩ) | Current (A) |
22D# | Φ0.76 | ≤12 | 5.0 |
20# | Φ1.00 | ≤5.0 | 7.5 |
16# | Φ1.60 | ≤2.5 | 13.0 |
12# | Φ2.40 | ≤1.5 | 23.0 |
2. EMI shielding:
100MHz~1GHz: minimum attenuation 85dB
1GHz~10GHz: minimum attenuation 50dB
3. Withstanding voltage(V):
Service rating | M | I | II |
Sea level | 1300 | 1800 | 2300 |
21000m | 800 | 1000 | 1000 |
4. Insulation resistance:
Normal≥5000MΩ, damp heat≥100MΩ
5. Electrical continuity between shells:
E class ≤5.0mΩ, B class ≤2.5mΩ, F class ≤1.0mΩ
6. Shell: Aluminum alloy, stainless steel or copper-alloy
7. Plating:
B class: Olive green cadmium plating
C class: Anodize
E class: Stainless steel passivated
F class: Electroless nickel plating
8. Insulator: Thermo-set plastic
9. Grommet and seal: Silicon rubber
10. Contact: Copper alloy with gold plated, crimp or PCB
11. Endurance: 500 cycles
12. Vibration:
Random vibration: at frequency: 100~1000Hz, density of power chart: 1G2/Hz
13. Shock: at 3 ms half sinusoid, peak value of acceleration: 300g
14. Operating temperature:
B class: -65 oC ~ +175 oC
C, E, F class: -65 oC ~ +200 oC
15. Salt spray: According to method from MIL-DTL-38999
F class 48h
C class 96h
B class 500h
E class 1000h
16. Relative humidity: 98 % at 40 oC
17. Operating height: ≤30480m
