M20-7871842

Overview

The M20-7871842 is a double-row header connector from the Harwin M20 series, designed for board-to-board or cable applications. It features a 2.54 mm (0.100 inch) pitch with square contact pins and a push-pull locking mechanism. The housing is constructed from black polyamide (PA6T/nylon 6T) rated UL94 V-0 for high-temperature stability. Contacts are made of copper alloy with tin plating on both mating and tail sections. It supports through-hole termination and operates within a temperature range of -40°C to 105°C.

Feature Summary

• Double-row configuration with jackscrew fixing for secure mechanical retention
• High-temperature resistant UL 94V-0 polyamide housing material
• Push-pull locking system ensures reliable connection integrity
• Square contact shape with tin-plated copper alloy terminals

Applications

• Board-to-board interconnections in industrial equipment
• Cable-to-board connections requiring robust latching
• High-temperature electronic assemblies
• General purpose connector systems needing secure retention

Procurement Notes

Verify the specific variant against official Harwin documentation, as the M20-7871842 designation may correspond to distinct single-row or double-row configurations depending on the suffix. Confirm that the required locking mechanism matches the application needs, as the series includes both jackscrew and latch options. Ensure compatibility with mating connectors regarding stacking height and pin geometry before procurement.

Selection Notes

Select this component when a secure, non-slip connection is critical for double-row layouts. The jackscrew fixing option provides superior vibration resistance compared to standard latches. Consider the thermal rating of the PA6T housing if the operating environment exceeds standard limits. Verify that the tin-plated contacts meet the corrosion requirements for the intended interface.

Part Context

This part belongs to the Harwin M20 series, a widely used family of rectangular connectors known for their modular design and reliability. The series offers various row counts, pitches, and locking mechanisms to suit diverse electronic assembly needs. The M20-7871842 specifically addresses applications requiring double-row density with enhanced mechanical security.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided data. Cross-reference with other Harwin M20 series variants only if they match the exact pitch, row count, and locking style.