M55302/55-B70H

Overview

The M55302/55-B70H is a rectangular MIL-DTL-55302 connector from the AirBorn W Series, manufactured by Molex. It features a 70-position, 2-row configuration with female socket contacts. The component utilizes gold-plated copper alloy terminals and a polyphenylene sulfide (PPS) housing. Designed for PCB mounting in a straight orientation, it supports crimp termination for 22 AWG wire. Electrical ratings include a 5 A current capacity and 100 V voltage rating, operating within a temperature range of -65 °C to +125 °C.

Feature Summary

• Military-grade construction compliant with MIL-DTL-55302 specifications
• High-density 70-position interconnect capability
• Corrosion-resistant gold plating on copper alloy contacts

Applications

• Avionics systems requiring rugged MIL-Spec connectivity
• Defense electronics and communication equipment
• Industrial control panels demanding high reliability

Procurement Notes

Verify the specific manufacturer source and current lifecycle status directly with Molex or AirBorn before procurement. Confirm that the ordering suffix corresponds exactly to the required contact termination and housing variations. Ensure compatibility with mating connectors within the same series to guarantee proper interface alignment and electrical performance.

Selection Notes

Select this part for applications requiring a straight-mount receptacle with crimped wire connections. Verify that the 2.54 mm pitch aligns with the board layout constraints. Ensure the system environment remains within the specified thermal limits and that the 5 A current rating per contact is sufficient for the intended load distribution across the 70 positions.

Part Context

This component belongs to the AirBorn W Series, a line of rectangular connectors designed for harsh environments. The M55302 designation indicates compliance with the MIL-DTL-55302 standard, ensuring standardized dimensions and performance criteria for military and aerospace applications. The series offers various position counts and termination styles to suit diverse integration needs.

Replacement Considerations

Substitute parts must match the 70-position count, 2-row layout, and female socket contact type. Verify identical MIL-DTL-55302 compliance and physical dimensions to ensure interchangeability without modifying the host assembly or mating hardware.