J599-20WH35SN Military Circular Connector
Product Overview
The J599-20WH35SN is a rugged MIL-DTL-38999 Series III circular connector manufactured in compliance with GJB599B standards. Designed for mission-critical electrical and signal transmission, it features a triple-start threaded coupling with an anti-decoupling mechanism, high contact density, superior EMI/RFI shielding, and exceptional resistance to shock, vibration, moisture, dust, and corrosive environments.
The connector is engineered for demanding aerospace, military, naval, railway, and industrial applications where reliability is essential.
Product Configuration
| Item | Specification |
|---|---|
| Model | J599-20WH35SN |
| Series | J599 |
| Standard | GJB599B / MIL-DTL-38999 Series III |
| Contact Arrangement | 100 Contacts |
| Contact Type | Female Socket Contacts |
| Shell Finish | W-Type Cadmium Plating (Military Green) |
| Termination | Crimp |
| Coupling | Triple-Start Threaded |
Key Features
- Compliant with GJB599B / MIL-DTL-38999 Series III
- Triple-start threaded quick coupling with anti-loosening mechanism
- Compact, lightweight construction
- High-density contact configuration
- Excellent EMI/RFI shielding
- Removable crimp contacts for easy maintenance
- Polarized keys prevent incorrect mating
- Supports fiber optic, coaxial, and shielded contacts
- Outstanding resistance to shock, vibration, and harsh environments
- Fully sealed against moisture, dust, wind, and sand
Applications
- Aerospace Systems
- Military Electronics
- Defense Equipment
- Naval Systems
- Radar & Communication Systems
- Avionics
- Railway Transportation
- Industrial Automation
- Signal & Power Transmission
Materials
| Component | Material |
|---|---|
| Shell | Aluminum Alloy / Stainless Steel / Titanium Alloy |
| Insulator | Thermosetting Plastic or Thermoplastic |
| Sealing Body & O-Rings | Silicone Rubber |
| Contacts | Gold-Plated Copper Alloy |
Available Shell Finishes
| Code | Finish |
|---|---|
| W | Cadmium Plating (Military Green) |
| F | Electroless Nickel |
| FT | Satin Cadmium-Plated Aluminum |
| K | Stainless Steel Passivation |
| TA | Titanium Alloy |
Mechanical Performance
| Parameter | Specification |
|---|---|
| Mechanical Life | ≥500 Mating Cycles |
| Shock Resistance | 300 g, 3 ms Half-Sine |
| Sine Vibration | 60 g (36 hours with temperature cycling) |
| Random Vibration (High Temperature) | 41.7 g RMS |
| Random Vibration (Ambient Temperature) | 49.5 g RMS |
Electrical Performance
Insulation Resistance
- ≥5000 MΩ (500 VDC)
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 |
Withstand Voltage
| Working Level | 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 |
Note: Voltage ratings vary depending on the contact arrangement.
EMI/RFI 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 Types
The J599 Series supports:
- Fiber Optic Contacts (Sizes 12, 16, and 20)
- Coaxial Contacts
- Shielded Contacts
- PCB Contacts
- Crimp Contacts
- Solder Contacts
Environmental Performance
| Parameter | Specification |
|---|---|
| Operating Temperature | W Class: -65°C to +175°C |
| Operating Temperature | F / FT / K / TA: -65°C to +200°C |
| Salt Spray Resistance | W: 500 hours |
| Salt Spray Resistance | K & TA: 1000 hours |
| Salt Spray Resistance | F: 48–96 hours |
| Salt Spray Resistance | FT: 96 hours |
| Sealing | Qualified to MIL-DTL-38999 Low-Pressure Immersion Requirements |
| Moisture Resistance | 10 cycles / 24 hours (MIL-DTL-38999) |
| Chemical Resistance | Resistant to fuels, lubricants, coolants, hydraulic fluids, and solvents |
#8 Dual Coaxial Contact Performance
| Parameter | Specification |
|---|---|
| Bandwidth | 0–20 MHz |
| Rated Voltage | 500 VAC (Sea Level) |
| Rated Voltage (21,000 m Altitude) | 125 VAC |
| Voltage Drop | ≤55 mV (Inner & Middle Contacts @1 A) |
| Voltage Drop | ≤75 mV (Outer Contact @12 A) |
Product Advantages
- Fully compliant with MIL-DTL-38999 Series III
- High-density 100-contact configuration
- Superior EMI/RFI shielding
- Excellent resistance to shock, vibration, corrosion, and harsh environments
- Lightweight yet durable construction
- Long service life with removable contacts
- Supports signal, power, fiber optic, and coaxial applications
- Ideal for aerospace, military, defense, naval, railway, and other mission-critical systems.
