Product Specifications
The J599 Series circular connectors comply with GJB599B (MIL-DTL-38999 Series III) standards and feature a triple-start threaded quick-coupling mechanism with anti-loosening capability. Designed for harsh military and industrial environments, they offer high contact density, lightweight construction, superior EMI shielding, and exceptional resistance to vibration, shock, moisture, sand, and corrosion.
The removable crimp contacts simplify maintenance, while polarized keys prevent mismating. Depending on the insert arrangement, the connectors support signal, power, fiber optic, coaxial, and shielded contacts, providing a versatile interconnection solution for mission-critical applications.
Key Features
- Compliant with GJB599B / MIL-DTL-38999 Series III
- Triple-start threaded coupling with anti-vibration locking
- Compact, lightweight, and high-density design
- Excellent EMI/RFI shielding performance
- Removable crimp contacts for easy maintenance
- Polarized keys prevent incorrect mating
- Supports fiber optic, coaxial, shielded, and power contacts
- Available in aluminum alloy, stainless steel, and titanium alloy shells
- Multiple military-grade surface finishes available
- Designed for severe vibration, shock, wind, sand, humidity, and corrosive environments
Materials
| Component | Material |
|---|---|
| Shell | Aluminum Alloy / Stainless Steel / Titanium Alloy |
| Insulator | Thermosetting or Thermoplastic Plastic |
| Sealing Body & O-Ring | Silicone Rubber |
| Contacts | Gold-Plated Copper Alloy |
Available Surface Finishes
| Class | Finish |
|---|---|
| W | Cadmium Plating (Military Green) |
| F | Electroless Nickel |
| K | Stainless Steel Passivation |
| FT | Satin Cadmium Plated Aluminum Alloy |
| TA | Titanium Alloy |
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | GJB599B / MIL-DTL-38999 Series III |
| Coupling Style | Triple-Start Threaded |
| Contact Termination | Crimp, Solder, PCB |
| Contact Sizes | 22D, 20#, 16#, 12#, 10# |
| Mechanical Life | ≥500 Mating Cycles |
| Shock Resistance | 300 g Peak, 3 ms Half-Sine |
| Operating Temperature | W: −65°C to +175°C F/K/FT/TA: −65°C to +200°C |
| Insulation Resistance | ≥5000 MΩ (500 VDC) |
| EMI Shielding | 85 dB (100 MHz–1 GHz) 65 dB @ 1–10 GHz (Class F) 50 dB @ 1–10 GHz (Class W) |
Electrical Performance
Dielectric Withstanding Voltage
| Service Class | Sea Level | 21,000 m Altitude |
|---|---|---|
| M | 1300 V | 800 V |
| N | 1000 V | 600 V |
| I | 1800 V | 1000 V |
| II | 2300 V | 1000 V |
Working voltage depends on the specific contact arrangement.
Contact Ratings
| 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 |
Shell Conductivity
| Class | Conductivity |
|---|---|
| W | 2.5 mV |
| F / FT | 1.0 mV |
| K / TA | 10 mV |
#8 Dual Coaxial Contact Performance
| Parameter | Specification |
|---|---|
| Frequency Range | DC–20 MHz |
| Rated Voltage | 500 VAC (Sea Level) 125 VAC (21,000 m) |
| Voltage Drop | ≤55 mV (Inner & Intermediate Contacts @ 1 A) ≤75 mV (Outer Contact @ 12 A) |
Environmental Performance
| Parameter | Specification |
|---|---|
| Salt Spray | W: 500 h K & TA: 1000 h F: 48/96 h FT: 96 h |
| Sealing | Meets MIL-DTL-38999 Series III Low-Pressure Immersion Requirements |
| Moisture Resistance | 10 Cycles / 24 Hours (MIL-DTL-38999) |
| Chemical Resistance | Resistant to fuels, lubricants, hydraulic fluids, coolants, and cleaning solvents |
Typical Applications
- Military & Defense Systems
- Aerospace & Aviation
- Naval Electronics
- Radar & Electronic Warfare Systems
- Missile & Weapon Control
- Satellite Communications
- Military Ground Vehicles
- Industrial Automation
- Harsh Environment Signal Transmission
- Fiber Optic & High-Speed Data Networks
Model J599-26WJ35PA is a 128-contact circular plug connector with pin contacts and crimp termination, designed for high-reliability signal transmission in severe military, aerospace, and industrial environments where durability, EMI protection, and environmental sealing are critical
