Amphenol Aerospace Mil-Spec Circular Connectors

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Amphenol Aerospace MIL‑Spec Circular Connectors, a core part of Amphenol Military & Aerospace (AMAO), form a comprehensive portfolio covering MIL‑DTL‑38999 Series I–III, 26482, 83723, and 5015 interfaces. They deliver ruggedized, qualified interconnects for military, aerospace, and harsh‑environment applications requiring reliable power, signal, and data transmission under vibration, temperature extremes, and EMI exposure.

Expanded 38999 and Mixed‑Signal Capability

The 38999+ Series III Tri‑Start threaded coupling mechanism ensures rapid, vibration‑resistant mating with full EMI/EMP shielding. These connectors accommodate standard and hybrid contact layouts supporting AS39029 signal pins, power, and high‑frequency coaxial interfaces. Through integration with SV Microwave contact systems, designs can include BMA, BMB, BMZ, SMPM, SMPS, and SV20 contacts rated from DC to 65 GHz across sizes 8 to 20 in Series I‑IV shells.

Material and Service Class Options

Shell materials include aluminum, stainless steel, titanium, composite, and bronze for optimized strength‑to‑weight and corrosion balance. Finishes such as Durmalon (nickel PTFE) and black zinc‑nickel provide RoHS‑compliant EMI shielding and salt‑spray resistance up to 2000 hours. Each service class defines temperature and environmental performance levels suited to aviation, naval, and vehicular systems.

Variant and Performance Features

• PowerSafe connectors with first‑mate/last‑break sequencing for high‑voltage distribution safety
• Tri‑Power with RADSOK high‑current contacts within standard 38999 shells
• Dualok anti‑vibration plugs for severe shock and high‑vibration environments
• OCS (Oval Contact System) for high‑speed differential data up to 10 Gbps
• SV Microwave high‑frequency coax contacts for mmWave and hybrid signal integration
• Hermetic, filtered, and fiber‑optic variants for sealed and EMI‑controlled systems

Application and Integration Guidance

These connectors are employed throughout flight control, mission computing, sensor, and power distribution modules. They are intermateable with standard 38999 backshells and accessories, supporting PCB‑mount, jam‑nut, and wall‑mount formats. Floating‑mount contact design and precisely controlled impedance help maintain low VSWR in RF paths and signal integrity in digital networks.

Selection and Related Families

Selection parameters include series type, shell style, insert arrangement, contact size, and termination method based on electrical loading and environmental requirements. For projects prioritizing high‑speed digital or differential signal performance, see the related Amphenol Military High‑Speed Mil‑Spec Circular Connectors family offering enhanced Ethernet and Fibre Channel capability.