306-021-421-178

Edgeboard Connectors Overview

The EDAC Inc. model 306-021-421-178 is a standard card edge connector receptacle designed for vertical panel mount applications. It features 21 positions with a contact spacing of 0.156 inches (3.96 mm). The unit accepts printed circuit boards with a nominal thickness of 0.062 inches (1.57 mm). Electrical specifications include a current rating of 5 A and gold-plated copper alloy contacts. The insulator body is constructed from thermoplastic polyester, providing a low-profile design suitable for dense mounting configurations.

Edgeboard Connectors Feature Summary

• Accepts single-sided PCBs with a nominal thickness of 0.062 inches
• Features a low-profile insulator body for compact panel integration
• Utilizes gold-plated copper alloy contacts for reliable signal transmission

Edgeboard Connectors Applications

• Vertical panel-mounted electronic assemblies
• Single-sided printed circuit board interconnections
• Industrial control system backplanes

Edgeboard Connectors Procurement Notes

Verify the specific ordering suffix to confirm contact plating and insulation material properties. Ensure the target application requires a 21-position configuration with a 3.96 mm pitch. Confirm that the panel mount style aligns with the mechanical constraints of the enclosure design before finalizing procurement.

Edgeboard Connectors Selection Notes

Select this component when a 21-contact interface is required for single-sided cards. The 3.96 mm pitch dictates compatible board layout dimensions. Verify that the 5 A current rating meets the electrical load requirements of the connected circuitry.

Edgeboard Connectors Part Context

This part belongs to the EDAC 306 series of standard card edge connectors. The series provides various position counts and termination options. The 306-021-421-178 variant specifically addresses needs for moderate-density connections in vertical mounting scenarios.

Edgeboard Connectors Replacement Considerations

Direct substitutes within the same series include parts with identical pitch and position counts but different plating or housing colors. Cross-series replacements require matching the 3.96 mm spacing and 1.57 mm board thickness acceptance.