305-078-521-503

Edgeboard Connectors Overview

The EDAC Inc. 305-078-521-503 is a standard card edge connector from the 305 Series, designed for dual-edge board applications. It features 78 positions with a 3.96 mm (0.156 inch) contact spacing and a 3.56 mm row spacing. The connector accepts printed circuit boards with a nominal thickness of 1.57 mm (0.062 inch). It utilizes female contacts made of copper alloy with gold plating, rated for 5 A continuous current and 1800 VACrms dielectric voltage. The housing is green thermoplastic polyester, supporting panel mount installation.

Edgeboard Connectors Feature Summary

• Dual-row configuration for double-sided card edge connections
• Gold-plated copper alloy contacts ensure reliable signal transmission
• Accepts between-contact and in-contact polarizing keys for secure alignment
• Low-profile insulator body facilitates compact panel integration

Edgeboard Connectors Applications

• Industrial control system backplanes
• Telecommunications equipment interconnects
• Test and measurement instrument modules
• Computer peripheral interface cards

Edgeboard Connectors Procurement Notes

Verify the specific suffix codes against the official EDAC ordering guide to confirm pin count, termination style, and mounting orientation. Ensure compatibility with the target PCB thickness of 1.57 mm. Confirm RoHS compliance status if required by project specifications. Cross-reference the Mouser or DigiKey part numbers for accurate sourcing channels.

Edgeboard Connectors Selection Notes

Select this model when a high-density 78-position connection is required for dual-edge boards. The 3.96 mm pitch suits applications needing robust mechanical retention. Consider the vertical panel mount style for chassis integration. Verify that the 5 A current rating meets the electrical load requirements of the connected circuitry.

Edgeboard Connectors Part Context

This component belongs to the EDAC 305 Series, which offers various position counts and mounting options. The series is characterized by its standardized 3.96 mm pitch and durable construction. Similar models include the 305-014-521-202 and 305-018-521-503, differing primarily in position count and termination type while maintaining consistent electrical characteristics.

Edgeboard Connectors Replacement Considerations

Direct substitutes within the same series include the 305-078-521-202 or 305-078-521-508, depending on the required termination style and mounting flange configuration. Verify dimensional compatibility before replacement.

Edgeboard Connectors FAQ

What is the maximum operating temperature range?

The connector operates within a temperature range of -40°C to +105°C.

Does the connector support polarizing keys?

Yes, the 305 Series connectors accept both between-contact and in-contact polarizing keys to prevent misalignment during insertion.