M55302/55-A40H

Overview

The M55302/55-A40H is a rectangular MIL-Spec connector from the AirBorn W Series, manufactured by Molex. It features 40 positions arranged in 2 rows with a 2.54 mm pitch. The plug utilizes gold-plated copper alloy pins and PPS housing. Rated for 1 kV and 5 A, it operates between -65°C and +125°C. Compatible with 22 AWG wire, this board-mount component meets MIL-DTL-55302 standards.

Feature Summary

• Compliant with MIL-DTL-55302 military specifications for rugged reliability
• Utilizes high-density two-row configuration for efficient space utilization
• Features corrosion-resistant gold plating on copper alloy contacts
• Constructed with durable polyphenylene sulfide insulation material

Applications

• Military avionics systems requiring certified interconnects
• Ruggedized ground-based communication equipment
• Defense electronics subject to strict environmental standards
• High-reliability industrial control panels

Procurement Notes

Verify the specific suffix against official Molex documentation to confirm exact contact geometry and mounting variations. Ensure compatibility with mating receptacles within the same series. Confirm RoHS status and lead-free requirements with the manufacturer prior to final procurement decisions.

Selection Notes

Select this model for applications demanding MIL-DTL-55302 compliance and high pin density. Evaluate thermal limits against operational environments exceeding standard ranges. Consider the 2.54 mm pitch for trace routing constraints. Verify mechanical fit for board-mounted installations.

Part Context

This component belongs to the AirBorn W Series, a line of rectangular connectors designed for harsh environments. The series emphasizes durability and consistent performance under vibration and shock. Molex acquired AirBorn, integrating these specialized connectors into their broader portfolio while maintaining military-grade quality standards.

Replacement Considerations

Cross-reference with M55302/55-A40H aliases such as WTA40SACJTB. Verify identical pin count, row configuration, and pitch before substitution. Ensure mating interface compatibility with existing system hardware.