306-025-421-178

Overview

The EDAC Inc. model 306-025-421-178 is a standard card edge connector receptacle designed for through-hole mounting. It features 50 positions with a dual female contact configuration and a 3.96 mm (0.156 inch) pitch. The connector accepts printed circuit boards with a nominal thickness of 1.57 mm (0.062 inch). Contacts are constructed from copper alloy with tin plating, rated for 5 A current. The insulator body is made of thermoplastic polyester in green color, offering a low-profile design suitable for straight installation angles.

Feature Summary

• Dual-edge female contact configuration for secure board retention
• Low-profile insulator body construction
• Through-hole termination method for PCB integration

Applications

• Industrial control system interconnects
• Telecommunications equipment backplanes
• Consumer electronics module interfaces

Procurement Notes

Verify the specific ordering suffix to confirm contact plating and material specifications, as variations exist within the 306 series. Confirm that the tin-plated variant aligns with your environmental and conductivity requirements. Ensure compatibility with the target PCB thickness of 0.062 inches before finalizing procurement. Cross-reference the manufacturer datasheet for precise mechanical dimensions and mounting hole patterns to guarantee fitment within the assembly constraints.

Selection Notes

Select this component when a dual-edge female connector with a 3.96 mm pitch is required for through-hole applications. Consider the tin-plated contacts if lead-free compliance or specific solderability characteristics are prioritized over gold plating. Evaluate the low-profile housing against available vertical space constraints. Ensure the 50-position count matches the signal density needs of the target circuit board design.

Part Context

This part belongs to the EDAC 306 series of standard card edge connectors. The series offers various position counts and mounting options. The 306-025-421-178 specifically utilizes a 50-position dual-edge layout. It shares the series' characteristic 3.96 mm spacing and thermoplastic polyester insulation. The numbering convention indicates position count, row configuration, and plating type.

Replacement Considerations

Direct substitutes within the same series include 306-025-520-178, which features gold plating instead of tin. Other variants in the 306 series may offer different position counts or mounting styles. Verify mechanical footprint and electrical ratings before substituting.