Amphenol M39029/71-392
Product Overview
Amphenol Aerospace's JT/LJT Series connectors are subminiature cylindrical connectors qualified to MIL-DTL-38999, Series I and II respectively. Developed for the aerospace industry, these connectors offer a lightweight, space-saving design with 5-key/keyway polarization and bayonet lock coupling for positive mating. They feature durable construction with impact-extruded or machined aluminum shells, rigid dielectric inserts, and fluorinated silicone interfacial seal wafers for electrical isolation. Available in a wide range of contact arrangements and sizes, they support various termination types including crimp, solder, PCB, wire wrap, coaxial, triaxial, and twinax. Optional high-temperature versions and N2O4 resistance are also available.
Product Attributes
- Brand: Amphenol Aerospace
- Series: JT / LJT
- Qualification: MIL-DTL-38999 Series I (LJT) and Series II (JT)
- Shell Material: Aluminum (impact extruded or machined bar stock)
- Standard Shell Plating: Cadmium over nickel
- Insert Material: Rigid dielectric
- Interfacial Seal: Fluorinated silicone
- Gasket: Main joint gasket for moisture sealing
- Contact Plating: Standard 50 micro inch minimum gold plating (100 micro inches optional)
- RoHS Compliant: Available (Consult Amphenol Aerospace Operations)
Technical Specifications
| Feature | Specification |
|---|---|
| Connector Series | MIL-DTL-38999 Series I (LJT) and Series II (JT) |
| Coupling | 5-key/keyway polarization with bayonet lock |
| Contact Arrangements | 2 to 128 circuits |
| Contact Sizes | 8, 10, 12, 16, 20, 22, 22D, 22M |
| Standard Temperature Capability | 302F (150C) for solder and crimp |
| High Temperature Capability | 392F (200C) for JTS/LJTS crimp type connectors |
| EMI Shielding | Grounding fingers standard in LJT Series; optional in JT Series |
| Hermetic Seal Receptacles | Available in carbon steel or stainless steel shells |
| N2O4 Resistance | Available for JTN/LJTN types when mated and protected |
| Contact Options | Crimp, Solder, PCB, Wire wrap, Thermocouple, Fiber Optic, Coaxial, Triaxial, Twinax |
| Hermetic Leakage Rate | Limited to 1 x 10 cm per second (optional) |
| Inventory Commonality | Uses standard MIL-DTL-38999 contacts, insert arrangements, and application tools |
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