71-418618-66W

Overview

The Amphenol Aerospace Operations part number 71-418618-66W is a circular MIL-spec connector plug belonging to the 38999 Aluminum series. It features an aluminum shell with a straight cable mount style and a threaded mating interface. The component utilizes a size 18 shell and provides 18 positions for signal transmission. Contacts are male pins made of copper with gold plating, designed for crimp termination. Electrical ratings include 13 A current capacity, 600 VAC, and 850 VDC voltage limits.

Feature Summary

• Constructed with an aluminum alloy housing for structural durability in harsh environments.
• Features gold-plated copper alloy contacts to ensure reliable electrical conductivity and corrosion resistance.
• Designed with a straight cable mount configuration for direct wiring integration.
• Utilizes a threaded coupling mechanism to secure connections during operation.

Applications

• Commercial aerospace avionics systems
• Aircraft airframe power distribution
• In-flight entertainment and connectivity control units
• Wire bundling and cable management assemblies

Procurement Notes

Verify the specific suffix codes against the manufacturer datasheet to confirm exact contact arrangements and environmental sealing ratings. Ensure compatibility with existing mating receptacles regarding shell size and pin count. Confirm that the crimp tooling matches the specified contact sizes for proper termination integrity. Cross-reference the legacy designation with current Amphenol ordering information to avoid procurement errors due to nomenclature updates.

Selection Notes

Select this component when a ruggedized circular connector is required for commercial aerospace applications. The aluminum construction offers weight savings compared to steel alternatives while maintaining necessary mechanical strength. Verify that the 18-position layout aligns with the system's wiring harness requirements. Ensure the operating environment temperature range falls within the specifications defined by the material selection and contact plating.

Part Context

This part belongs to the Amphenol 38999 series of circular connectors, which are widely used in military and aerospace industries. The series is known for its high density and reliability in demanding conditions. The 71- prefix indicates a specific legacy or cross-referenced numbering system often associated with older Mil-Spec designs now integrated into modern product lines.

Replacement Considerations

Cross-reference with MS3126E18-66P equivalents if adhering to strict military standards is required. Verify dimensional compatibility with existing panel cutouts and mating interfaces before substitution.