M20-7871042

Overview

The M20-7871042 is a 20-position dual in-line (DIL) socket assembly from the Harwin M20 series. It features a 2.54 mm pitch and two rows of contacts designed for surface mount technology (SMT). The connector utilizes bottom entry configuration with solder termination. Contact materials are phosphor bronze, finished with gold plating, while the termination surfaces are tin over nickel plated. Rated at 3A per contact and 250V, it operates within a temperature range of -40°C to 105°C. The housing is constructed from black polyamide (PA6T) with UL94 V-0 flammability rating.

Feature Summary

• Dual row DIL socket design for board-to-board interconnection
• Surface mount termination with bottom entry contact access
• Gold-plated phosphor bronze contacts for reliable signal transmission
• Polyamide insulation housing with high flammability resistance

Applications

• High-density electronic circuit board interconnections
• Server and storage system backplane connections
• Industrial control module interface points
• Telecommunications equipment signal routing

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific lot traceability requirements before procurement. Ensure storage conditions maintain integrity of gold-plated contacts. Check for obsolescence notices as availability may be limited. Validate that the specific suffix matches the required termination and contact finish specifications for the target application.

Selection Notes

Select this component when a low-profile, surface-mount female connector is required for high-reliability applications. The 2.54 mm pitch ensures compatibility with standard header pins. Consider the bottom-entry design for PCB layout flexibility where top-side access is restricted. Verify that the 3A current rating and 250V voltage limit meet the circuit requirements. Ensure the SMT process capabilities align with the connector's thermal profile specifications during assembly.

Part Context

This part belongs to the Harwin M20 series, known for compact, high-density interconnect solutions. The M20 series offers various configurations including headers, sockets, and test points. The M20-7871042 specifically addresses needs for robust, surface-mounted female connectors in space-constrained environments. It complements other M20 series components to form complete interconnect systems.

Replacement Considerations

Check for direct substitutes within the M20 series offering identical pin counts and pitch. Verify mechanical dimensions and electrical ratings match exactly. Consult official Harwin documentation for recommended alternative part numbers if this specific SKU is discontinued. Ensure any replacement maintains the same contact material and plating specifications.