305-070-521-503

Edgeboard Connectors Overview

The EDAC Inc. 305-070-521-503 is a standard card edge connector from the 305 series, designed for dual-edge board insertion. It features 70 positions with a contact spacing of 0.156 inches (3.96 mm) and a row spacing of 0.140 inches (3.56 mm). The connector accepts printed circuit boards with a nominal thickness of 0.062 inches (1.57 mm). It utilizes gold-plated copper alloy contacts and a green thermoplastic insulator body. Rated for 5 A continuous current, it supports vertical panel mounting via solder pin termination.

Edgeboard Connectors Feature Summary

• Accepts between-contact and in-contact polarizing keys for secure board alignment
• Low profile insulator body design for compact integration
• Dual female contact configuration for double-sided card edge insertion

Edgeboard Connectors Applications

• Industrial control systems requiring robust card edge interfaces
• Communication equipment utilizing modular board architectures
• Test and measurement instruments needing reliable signal transmission

Edgeboard Connectors Procurement Notes

Verify the specific ordering suffix to confirm contact plating thickness and insulator color variations within the 305 series. Confirm that the target application requires a 0.062-inch board thickness, as this connector is optimized for that dimension. Ensure compatibility with the required polarizing key style if mechanical locking is necessary for the assembly process.

Edgeboard Connectors Selection Notes

Select this component when a high-density 70-position interface is required for double-sided card edge applications. The 3.96 mm pitch offers a balance between signal density and manufacturing ease. Consider the 5 A current rating for power distribution needs alongside signal lines. Verify that the vertical panel mount style aligns with the enclosure design constraints.

Edgeboard Connectors Part Context

This part belongs to the EDAC 305 series of standard card edge connectors. The series provides various position counts and mounting styles while maintaining consistent electrical characteristics. The 305 series is widely used in industrial and commercial electronics where reliable interconnection between backplanes and daughter cards is essential.

Edgeboard Connectors Replacement Considerations

Cross-reference with other EDAC 305 series variants such as 305-070-520-504 or 305-070-556-568 for similar form factors. Verify that alternative parts match the 0.156-inch pitch and 0.062-inch board thickness requirements before substitution.