306-021-521-107

Overview

The EDAC Inc. 306-021-521-107 is a standard card edge connector designed for vertical panel and through-hole mounting. It features 21 positions with a dual female configuration and a 0.156-inch (3.96mm) contact spacing. The connector utilizes copper alloy cantilever contacts with gold plating to ensure reliable signal transmission. It accommodates printed circuit boards with a thickness range of 0.054 to 0.070 inches (1.37mm to 1.78mm). The insulator body is constructed from thermoplastic polyester, providing stability across an operating temperature range of -40°C to +105°C.

Feature Summary

• Features cantilever spring contacts for secure board retention
• Includes integrated card guide rails for alignment
• Utilizes gold-plated copper alloy terminals for conductivity
• Supports flush panel mounting with threaded inserts

Applications

• Industrial control system interconnects
• Telecommunications equipment backplanes
• Test and measurement instrument modules
• Embedded computing hardware interfaces

Procurement Notes

Verify the specific flange thread size and orientation against mechanical drawings before procurement. Confirm that the target PCB thickness falls within the specified 1.37mm to 1.78mm range to ensure proper contact engagement. Check RoHS compliance requirements if applicable to the end product. Ensure the selected variant matches the required current rating and insulation resistance specifications for the intended electrical environment.

Selection Notes

Select this component when a robust, high-reliability connection is required for double-sided edge cards. The integrated guide rails simplify assembly by maintaining precise alignment during insertion. Consider the thermal performance limits of the thermoplastic insulator when designing for high-temperature environments. Verify that the panel cutout dimensions accommodate the specific flange characteristics of this series.

Part Context

This part belongs to the EDAC 306 Series, which offers various configurations for card edge applications. The series provides options for different pin counts, contact spacings, and mounting styles. The 306-021-521-107 specifically addresses needs for moderate density connections with enhanced mechanical stability provided by the guide rail feature.

Replacement Considerations

Direct substitutes must match the 0.156-inch pitch, 21-position count, and dual female contact type. Verify compatibility with the same PCB thickness range and mounting hole pattern. Cross-reference with other EDAC series like 316 or 356 only if mechanical footprints and electrical ratings are identical.