MIL-DTL-38999 III series military circular connector
1. military standard MIL-DTL-38999K
2. tri-start coupling
MIL-DTL-38999 III series military circular electrical connector
A. Brief Introduction
This series of connector complies with the military standard MIL-DTL-38999K (Chinese military standard GJB599A). It is designed as tri-start quick coupling, anti-decoupling mechanism and crimping contact.
B. Specification
1. Contact resistance and current rating:
Contact ID | Diameter (mm) | Resistance (mΩ) | Current (A) |
22D# | Φ 0.76 | ≤ 12.0 | 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 |
2. EMI shielding:
At 1GHz: minimum attenuation 85dB (F and W)
At 10GHz: minimum attenuation 65dB (F)
At 10GHz: minimum attenuation 50dB (W)
3. Withstanding voltage (V):
Service rating | M | I | II | N |
Sea level | 1300 | 1800 | 2300 | 1000 |
21000m | 800 | 1000 | 1000 | 600 |
4. Insulation resistance:
Normal ≥ 5000 MΩ, damp heat ≥ 100 MΩ
5. Electrical continuity between shells:
W class ≤ 2.5 mΩ, F class ≤ 1.0 mΩ, K class ≤ 5.0 mΩ
6. Shell: Aluminum alloy, stainless steel or copper-alloy
7. Plating:
W class: Olive green cadmium plating
K 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
11. Endurance: 500 cycles
12. Vibration:
Sine: 60g, with temperature cycling and simulated accessory (36 hours)
Random: 44.1 grms in high temperature
49.5 grms in ambient temperature
13. Shock: At 3 ms half sinusoid, peak value of acceleration: 300g
14. Contact retention:
22D#, 45N 20#, 67N 16#, 111N 12#, 111N 10#, 111N 8#, 111N
15. Operating temperature:
W class: -65 oC ~ +175 oC
K, F class: -65 oC ~ +200 oC
16. Salt spray: according to method from MIL-DTL-38999
F class 48h
W class 500h
K class 1000h
