M20-7851746

Overview

The M20-7851746 is a dual-in-line socket assembly from the Harwin M20 series, designed for board-to-board interconnections. It features 34 positions arranged in two rows of 17 contacts each, with a standard 2.54 mm (0.100 inch) pitch. The connector utilizes through-hole termination for secure PCB mounting and accepts bottom or top entry mating configurations. Contact surfaces are finished with tin plating to ensure reliable signal transmission. The housing is constructed from high-performance thermoplastic material rated UL94 V-0 for flame resistance, supporting operation within a temperature range of -40°C to +105°C.

Feature Summary

• Dual-in-line configuration providing 34 contact positions for high-density circuit integration
• Versatile entry design accommodating both bottom and top mating orientations
• Through-hole solder termination ensures robust mechanical fixation on printed circuit boards

Applications

• High-density board-to-board interconnect systems
• Industrial control module assemblies
• Telecommunications equipment backplanes

Procurement Notes

Verify the specific manufacturing date code against project requirements, as this component may be subject to lifecycle changes. Confirm that the tin-plated contact finish aligns with your assembly's solderability standards and environmental exposure limits. Ensure the through-hole footprint matches your PCB layout guidelines precisely. Cross-reference the UL94 V-0 insulation rating with your system's thermal management specifications to guarantee compliance under operational loads.

Selection Notes

Select this model when a 34-position female header is required for rigid board-to-board connections. The dual-row layout optimizes space efficiency compared to single-row alternatives. Choose the tin-plated variant if lead-free soldering processes are mandated. Consider the bottom/top entry flexibility for complex stacking arrangements where vertical clearance varies. Validate that the 2.54 mm pitch matches existing male pin headers in the assembly.

Part Context

This component belongs to the M20 series, a widely adopted line of industrial-grade connectors known for their compact form factor and reliability. The series supports various row counts and termination styles, making it suitable for diverse electronic applications. The M20-7851746 specifically addresses the need for medium-density interconnects with flexible mating options, bridging the gap between low-pin-count signals and high-density data buses.

Replacement Considerations

Compatible substitutes include other 34-position, 2.54mm pitch dual-row sockets from the same manufacturer series. Verify that alternative parts maintain identical through-hole termination and tin plating specifications. Ensure any replacement offers matching UL94 V-0 insulation ratings and similar operating temperature ranges to preserve system integrity.