J599 Series (MIL-DTL-38999 Series III) Circular Connectors
Product Overview
The J599 Series Circular Connectors are manufactured in accordance with GJB599B (MIL-DTL-38999 Series III) standards and are designed for demanding military, aerospace, naval, and industrial applications.
Featuring a triple-start threaded coupling system with an anti-decoupling mechanism, these connectors provide secure mating, high contact density, superior EMI/RFI shielding, and exceptional resistance to shock, vibration, moisture, dust, and extreme temperatures.
Removable crimp contacts simplify maintenance and replacement, while multiple shell materials and surface finishes allow the connectors to meet a wide range of environmental and application requirements.
Key Features
- Compliant with GJB599B / MIL-DTL-38999 Series III
- Triple-start threaded quick coupling with anti-loosening mechanism
- High-density contact arrangement
- Lightweight and compact construction
- Excellent EMI/RFI shielding
- Removable crimp contacts
- Anti-misalignment keying system
- High resistance to vibration and mechanical shock
- Environmentally sealed construction
- Compatible with fiber optic, coaxial, and shielded contacts
- Available in aluminum alloy, stainless steel, and titanium alloy shells
Applications
- Military & Defense Systems
- Aerospace & Avionics
- Naval Electronics
- Radar & Communication Systems
- Ground Vehicles
- Industrial Automation
- Railway Systems
- High-Reliability Electronic Equipment
Technical Specifications
Materials
| Item | Specification |
|---|---|
| Shell | Aluminum Alloy / Stainless Steel / Titanium Alloy |
| Insulator | Thermosetting or Thermoplastic |
| Sealing Components | Silicone Rubber |
| Contact Material | Gold-Plated Copper Alloy |
Surface Finish Options
| Code | Finish |
|---|---|
| W | Cadmium Plating (Military Green) |
| F | Electroless Nickel |
| K | Stainless Steel Passivation |
| FT | Satin Cadmium Plating |
| TA | Titanium Alloy |
Electrical Characteristics
| Parameter | Value |
|---|---|
| Insulation Resistance | ≥5000 MΩ (500 VDC) |
| Mechanical Life | ≥500 Mating Cycles |
| Contact Type | Crimp / Solder / PCB |
| EMI Shielding | Up to 85 dB |
Contact Resistance & Rated Current
| Contact Size | Diameter | Contact Resistance | Rated Current |
|---|---|---|---|
| 22D | 0.76 mm | ≤12 mΩ | 5 A |
| 20 | 1.00 mm | ≤5 mΩ | 7.5 A |
| 16 | 1.60 mm | ≤2.5 mΩ | 13 A |
| 12 | 2.40 mm | ≤1.5 mΩ | 23 A |
| 10 | 3.15 mm | ≤1.0 mΩ | 40 A |
Environmental Performance
| Parameter | Value |
|---|---|
| Operating Temperature (W) | -65°C to +175°C |
| Operating Temperature (F/K/FT/TA) | -65°C to +200°C |
| Salt Spray Resistance | W: 500 h • K/TA: 1000 h • F: 48–96 h • FT: 96 h |
| Moisture Resistance | MIL-DTL-38999 Standard |
| Sealing | MIL-DTL-38999 Low-Pressure Immersion |
| Chemical Resistance | Resistant to fuels, coolants, lubricants and solvents |
Mechanical Performance
| Parameter | Value |
|---|---|
| Shock | 300 g Peak, 3 ms Half-Sine |
| Sine Vibration | 60 g |
| Random Vibration (High Temp.) | 41.7 g RMS |
| Random Vibration (Ambient) | 49.5 g RMS |
EMI Shielding Performance
| Frequency Range | Shielding Effectiveness |
|---|---|
| 100 MHz – 1 GHz | ≥85 dB (Class W & F) |
| 1 GHz – 10 GHz | ≥65 dB (Class F), ≥50 dB (Class W) |
Optional Contact Configurations
- Fiber Optic Contacts (Sizes 12#, 16#, 20#)
- Coaxial Contacts (Sizes 8#, 10#, 12#)
- Shielded Contacts
- PCB Contacts
- Solder Contacts
- Crimp Contacts
Product Advantages
- Military-grade reliability
- High contact density
- Excellent environmental sealing
- Superior EMI/RFI protection
- Lightweight yet rugged construction
- Easy maintenance with removable contacts
- Long service life
- Ideal for harsh operating environments
