71-418620-39R

Overview

The Amphenol Aerospace Operations 71-418620-39R is a circular MIL-spec connector plug designed for robust interconnect applications. It features an aluminum alloy shell with a straight cable mount style and threaded coupling mechanism. The component utilizes crimp termination for secure wire attachment and contains 39 positions arranged in the 20-39 insertion pattern. Socket contacts are constructed from copper alloy with gold plating to ensure reliable signal transmission. Rated for 600 VAC and 850 VDC, it supports current ratings of 7.5 A and 13 A depending on configuration. This series adheres to MIL-DTL-38999 standards, providing durability for demanding environments.

Feature Summary

• Constructed with an aluminum alloy shell for structural integrity and weight efficiency
• Features threaded coupling style for secure connection retention
• Utilizes gold-plated copper alloy socket contacts for corrosion resistance
• Designed for cable mounting with crimp termination methods

Applications

• Commercial aerospace avionics systems
• Aircraft airframe power distribution
• In-flight entertainment system interconnects
• Control and instrumentation circuits
• Harsh environment industrial equipment

Procurement Notes

Verify the specific suffix designation against the manufacturer's official documentation to confirm exact contact arrangement and plating specifications. Ensure compatibility with mating receptacles regarding shell size and thread type. Confirm that the crimp tooling matches the specified contact wire gauge requirements. Check for any updated environmental compliance certifications required by the target application region. Validate that the aluminum shell finish meets the necessary corrosion protection standards for the operating environment.

Selection Notes

Select this component when a high-density 39-position circular connector is required for cable-mounted installations. The threaded coupling style offers superior vibration resistance compared to bayonet styles. Gold plating is essential for applications requiring low contact resistance and long-term reliability. The aluminum shell provides a balance of strength and weight reduction suitable for aerospace constraints. Ensure the voltage and current ratings align with the circuit design parameters before integration.

Part Context

This part belongs to the Amphenol 38999 Aluminum Series, a widely adopted family of circular connectors in the military and aerospace sectors. The series is known for its interchangeability with other manufacturers' products meeting MIL-DTL-38999 specifications. The 71-series prefix typically denotes commercial or specific industry variants within the broader MIL-SPEC ecosystem. These connectors are engineered to withstand extreme temperatures, humidity, and mechanical stress common in flight and ground support equipment.

Replacement Considerations

Cross-reference with MIL-DTL-38999 compliant equivalents from other manufacturers such as ITT Cannon or Glenair. Verify that substitute parts match the 20-39 insertion arrangement and shell size 20 dimensions exactly. Ensure the mating interface thread pitch and engagement length are compatible. Confirm that the replacement supplier offers equivalent gold plating thickness and contact material composition.