399-91-040-21-300000

Headers, Receptacles, Female Sockets Overview

The Mill-Max 399-91-040-21-300000 is a spring-loaded test probe designed for rigorous electrical connections. It features a brass alloy construction with gold plating and operates within a temperature range of -55°C to 125°C. The component supports a rated current of 6.4A and offers a mechanical life of 1,000,000 cycles. Key dimensions include a plunger diameter of 0.042 inches (1.07mm) and an overall height of 0.362 inches.

Headers, Receptacles, Female Sockets Feature Summary

• Provides reliable electrical connection in rigorous environments using sleeve and plunger pogo pin design
• Features gold contact finish for enhanced conductivity and corrosion resistance
• Supports through-hole and solder cup mounting configurations

Headers, Receptacles, Female Sockets Applications

• In-circuit testing and board-level diagnostics
• Burn-in fixtures and production test jigs
• Automated test equipment (ATE) interfaces

Headers, Receptacles, Female Sockets Procurement Notes

Verify the specific plunger diameter and operating force requirements against your test fixture specifications. Confirm that the gold plating thickness meets your conductivity standards. Ensure the through-hole or solder cup mounting style aligns with your PCB layout. Check the active status and RoHS compliance for regulatory adherence before finalizing procurement.

Headers, Receptacles, Female Sockets Selection Notes

Select this model when high cycle durability and consistent contact resistance are required for test applications. The 6.4A rating suits moderate current testing scenarios. Consider the 0.042-inch plunger size for compatible mating targets. Evaluate the -55°C to 125°C range against your operational environment constraints.

Headers, Receptacles, Female Sockets Part Context

This component belongs to the Mill-Max individual spring-loaded contacts and test probes series. It is manufactured by Mill-Max Manufacturing Corp., a provider of precision-machined interconnect components. The product line focuses on high-reliability solutions for demanding electronic testing and interconnection needs.

Headers, Receptacles, Female Sockets Replacement Considerations

Consult official Mill-Max documentation for direct cross-reference part numbers. Verify dimensional compatibility and electrical ratings before substituting.