306-039-521-103

Overview

The EDAC Inc. 306-039-521-103 is a dual-edge female card edge connector from the 306 series, designed for panel and through-hole mounting. It features 78 positions with a 0.156-inch (3.96mm) contact spacing and gold-plated contacts. The connector accepts printed circuit boards with thicknesses ranging from 0.054 to 0.070 inches (1.37mm to 1.78mm). Constructed with a green thermoplastic insulator and copper alloy terminals, it operates within a temperature range of -40°C to +105°C. This component ensures reliable electrical connections for standard double-sided card edge applications.

Feature Summary

• Dual-edge female configuration for secure board retention
• Gold-plated contacts ensure corrosion resistance and low contact resistance
• Thermoplastic insulator body provides durability and thermal stability
• Panel mount design with through-hole termination for robust installation

Applications

• Industrial control systems requiring reliable I/O connections
• Telecommunications equipment backplanes
• Test and measurement instrumentation modules
• Computer peripheral interface cards

Procurement Notes

Verify that the specific part number matches the required 78-position dual-edge specification. Confirm that the PCB thickness falls within the accepted range of 0.054 to 0.070 inches. Ensure the application environment remains within the specified operating temperature limits. Check for RoHS compliance requirements if applicable to the final assembly standards. Validate that the gold plating finish meets the conductivity needs of the signal lines.

Selection Notes

Select this connector when a dual-edge female interface is required for standard thickness boards. The 0.156-inch pitch suits applications needing wider spacing for high-voltage isolation or ease of assembly. Consider the gold finish for environments where oxidation resistance is critical. The panel mount style is ideal for chassis-based designs rather than board-to-board stacking. Verify that the 78-position count aligns with the signal and power requirements of the target circuit design.

Part Context

This component belongs to the EDAC 306 series of standard card edge connectors. The series offers various position counts and edge configurations to support diverse electronic module designs. The 306-039-521-103 specifically addresses the need for a mid-range position count with dual-edge access. Its design complements other single-edge variants in the lineup by providing connection points on both sides of the card for increased pin density.

Replacement Considerations

Direct substitutes may include other EDAC 306 series parts with identical 78-position dual-edge specifications. Cross-referencing with generic card edge connectors requires verifying pitch, board thickness, and mounting style compatibility. Ensure any replacement maintains the same gold plating and thermoplastic housing material properties.