305-078-521-278

Edgeboard Connectors Overview

The EDAC Inc. 305-078-521-278 is a standard card edge connector featuring 78 positions arranged in a dual female configuration. It utilizes a 0.156-inch (3.96 mm) contact spacing with a row spacing of 0.140 inches (3.56 mm). Designed for panel installation at a vertical angle, the unit accepts printed circuit boards with a nominal thickness of 0.062 inches (1.57 mm). The contacts are constructed from copper alloy and finished with gold plating to ensure reliable conductivity. Rated for 5 A continuous current and 1800 VACrms insulation voltage, it operates within a temperature range of -40°C to +105°C.

Edgeboard Connectors Feature Summary

• Accepts between-contact and in-contact polarizing keys for secure board alignment
• Features a low-profile insulator body constructed from thermoplastic material
• Provides high dielectric strength with an insulation resistance of 5 GOhms

Edgeboard Connectors Applications

• Industrial control system backplanes
• Telecommunications equipment interconnects
• Test and measurement instrumentation modules

Edgeboard Connectors Procurement Notes

Verify that the specific ordering suffix matches the required termination style and contact finish specifications. Confirm compliance with RoHS3 directives and REACH regulations prior to integration. Ensure the selected variant aligns with the designated panel mounting requirements and thermal operating limits defined in the official datasheet.

Edgeboard Connectors Selection Notes

Select this component when a high-density dual-edge interface is required for rigid PCBs up to 1.57 mm thick. The 3.96 mm pitch supports substantial I/O counts while maintaining a compact footprint. Evaluate the 5 A current rating against total load requirements and verify compatibility with existing polarizing key systems.

Edgeboard Connectors Part Context

This part belongs to the EDAC 305 Series, a family of standard card edge connectors designed for robust industrial applications. The series offers various position counts and termination options to accommodate diverse board layouts. Components in this line typically feature durable copper alloy contacts and thermoplastic housings suitable for harsh environments.

Edgeboard Connectors Replacement Considerations

Cross-reference compatible parts such as the 305-078-520-278 or 305-078-556-278 if different termination styles or housing colors are required. Verify that substitute models maintain identical 3.96 mm spacing and 1.57 mm board thickness acceptance capabilities.