GJB599B MIL-DTL-38999 Series II EMI Shielded Circular Connector
The GJB599B MIL-DTL-38999 Series II EMI Shielded Circular Connector is a compact, lightweight connector designed for circuit signal connection. It complies with the MIL-DTL-38999 Series II standard and adopts a card-type quick connection design for reliable and efficient electrical interconnection.
This series features small size, light weight, short shell length, EMI/RFI shielding, detachable press-fit contacts, and anti-mismating contact protection. For limited-space applications where plugging and unplugging are difficult, pre-installed contacts in the receptacle are recommended.
The connector is available with aluminum alloy or stainless-steel shells. Contact materials use gold-plated copper alloy and support crimp, solder, and PCB mounting. With a mechanical life of 500 mating cycles, random vibration resistance from 100–1000 Hz at 1 g²/Hz, and 300g half-sine shock resistance, this series is suitable for lightweight electronic systems, communication equipment, industrial control devices, and compact signal interconnection applications.
behaviour of electricity
Contact resistance and rated current of the contact parts:
| Contact Specifications |
Working diameter mm |
Contact resistance m Ω |
Rated current A |
| 22D |
Φ0.76 |
≤12 |
5 |
| 20# |
Φ1.00 |
≤5 |
7.5 |
| 16# |
Φ1.60 |
≤2.5 |
13 |
| 12# |
Φ2.40 |
≤1.5 |
23 |
Electromagnetic interference shielding: at 100 MHz-1 GHz, minimum attenuation is 45 dB; Withstand voltage:V
| Job Level* |
M |
Ⅰ |
Ⅱ |
| Sea Level |
1300 |
1800 |
2300 |
| 21000m |
800 |
1000 |
1000 |
Insulation resistance: Under normal conditions ≥ 5000 MΩ
Electrical continuity between the shell and interior: Class B ≤ 2.5 m Ω
Moisture condition: ≥ 100 M Ω
F class ≤ 1.0 m Ω E class ≤ 50 m Ω
JY27508 Box-shaped square plate with rear-mounted socket
| Shell Number |
D1 |
D2 |
D3 |
L max |
A |
B |
T |
d1 |
d2 |
| 08 |
12.00 |
11.51 |
13.20 |
2.0 |
21.00 |
15.09 |
3.2 |
12.5 |
14.2 |
| 10 |
15.00 |
14.68 |
16.14 |
2.0 |
24.10 |
18.26 |
3.2 |
15.5 |
17.5 |
| 12 |
19.05 |
17.86 |
20.50 |
2.0 |
26.50 |
20.62 |
3.2 |
19.5 |
21.3 |
| 14 |
22.23 |
21.03 |
23.60 |
2.0 |
28.90 |
23.01 |
3.2 |
21.5 |
25.0 |
| 16 |
25.40 |
24.21 |
26.80 |
2.0 |
31.21 |
24.61 |
3.2 |
25.0 |
27.3 |
| 18 |
28.58 |
26.97 |
30.00 |
2.0 |
33.60 |
26.97 |
3.2 |
28.0 |
31.3 |
| 20 |
31.75 |
30.18 |
33.20 |
2.5 |
36.80 |
29.36 |
3.2 |
31.5 |
34.5 |
| 22 |
34.93 |
33.32 |
36.35 |
2.5 |
40.00 |
31.75 |
3.2 |
34.5 |
37.5 |
| 24 |
38.10 |
36.53 |
39.50 |
2.5 |
43.10 |
34.93 |
3.9 |
37.5 |
40.6 |
