71-528268-21Z

Overview

The Amphenol Aerospace Operations 71-528268-21Z is a circular MIL-spec receptacle connector designed for cable mounting. It features 21 positions with socket contacts, utilizing an insert arrangement designated as 22-21. The housing is constructed from aluminum alloy and finished with cadmium plating and chromate passivation. Contacts are made of copper alloy and gold-plated to ensure reliable conductivity. This component adheres to the MIL-DTL-26482 Series I standard, providing environmental sealing capabilities suitable for demanding operational conditions.

Feature Summary

• Mil-dtl-26482 series i compliance for ruggedized performance
• Cable-mount receptacle configuration with crimp termination
• Gold-plated copper alloy contacts for signal integrity
• Environmentally sealed design for harsh operating conditions

Applications

• Avionics systems in commercial and military aircraft
• Industrial instrumentation and control circuits
• Harsh environment communication equipment
• Military vehicle electrical distribution networks

Procurement Notes

Verify that the specific suffix 'z' aligns with the required cadmium plating specification, as this finish provides corrosion resistance but may be restricted under certain environmental regulations. Confirm that the crimp tooling matches the contact size requirements for the 22-21 insert arrangement. Ensure that the mating plug utilizes the correct bayonet coupling mechanism compatible with series i connectors to maintain proper environmental sealing integrity during operation.

Selection Notes

Select this model when a 21-position cable-mounted receptacle is required for MIL-DTL-26482 Series I applications. The choice depends on the need for gold-plated contacts and a cadmium-plated aluminum shell. Verify that the system design accommodates the bayonet coupling style and that the operating temperature range falls within the standard specifications for this connector series without requiring specialized high-temperature variants.

Part Context

This part belongs to the extensive family of miniature cylindrical connectors produced by Amphenol Aerospace. These components are engineered to meet strict military standards for reliability and durability. The 71-series designation typically indicates a specific manufacturer code or internal product line identifier within the broader MIL-DTL-26482 ecosystem, ensuring compatibility with other industry-standard connectors sharing the same shell size and insert arrangement.

Replacement Considerations

Equivalent parts include MS3471L22-21S and MS3470L22-21S, provided they match the exact shell size, insert arrangement, and contact type. Cross-referencing the full mil-spec drawing is essential to ensure mechanical and electrical interchangeability, particularly regarding the bayonet coupling interface and environmental sealing ratings.