305-078-556-201

Edgeboard Connectors Overview

The EDAC Inc. 305-078-556-201 is a standard card edge connector from the 305 series, designed for panel mount applications with a vertical orientation. It features 78 positions arranged in two rows, utilizing 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). Contacts are constructed from copper alloy with gold plating to ensure reliable signal transmission. The housing is made of green thermoplastic material, providing insulation resistance of 5 GOhms. It supports a current rating of 5 A and operates within a temperature range of -40°C to +105°C.

Edgeboard Connectors Feature Summary

• Dual-row configuration with 78 total positions for high-density interconnects
• Gold-plated copper alloy contacts for corrosion resistance and conductivity
• Panel mount design with vertical installation angle for secure board retention
• Thermoplastic insulator body rated for temperatures up to +105°C

Edgeboard Connectors Applications

• Industrial control systems requiring robust card edge interfaces
• Telecommunications equipment backplanes
• Test and measurement instrumentation modules
• Computer peripheral interface cards

Edgeboard Connectors Procurement Notes

Verify the specific suffix codes against the official EDAC ordering guide to confirm exact pin count, termination style, and plating thickness. Ensure the target PCB thickness aligns with the 1.57 mm nominal specification to guarantee proper mechanical engagement. Confirm RoHS compliance status if required by project specifications. Cross-reference the manufacturer part number with distributor catalogs to identify equivalent stock or lead times.

Edgeboard Connectors Selection Notes

Select this component when a dual-row card edge connector with 3.96 mm pitch is required for panel-mounted assemblies. The 78-position capacity suits applications needing extensive I/O connections in a compact footprint. Verify that the operating environment temperature does not exceed the +105°C maximum limit. Consider the vertical mounting style for space-constrained enclosures where board insertion is perpendicular to the panel surface.

Edgeboard Connectors Part Context

This connector belongs to the EDAC 305 series, which offers various position counts and termination options. The 305 series is characterized by its low-profile insulator body and standardized dimensions for compatibility with common card edge designs. Similar models in the series include variations with different pin counts such as 305-070-556-568 or 305-054-556-278, sharing identical pitch and mounting characteristics.

Edgeboard Connectors Replacement Considerations

Direct substitutes may include other EDAC 305 series connectors with matching 78 positions and 3.96 mm pitch. Verify mechanical fit and electrical ratings before swapping. Generic equivalents must match the 1.57 mm board thickness acceptance and gold-plated contact specifications.