M20-7860442

Overview

The M20-7860442 is a rectangular connector header from the Harwin M20 series, designed for surface mount technology (SMT) applications. It features a single row with four positions and a mating pitch of 0.100 inches (2.54 mm). The connector utilizes square-shaped contacts made from phosphor bronze, with gold plating on the mating surfaces and tin plating on the tails for soldering. The housing is constructed from black polyamide (PA6T/nylon 6T), rated UL94 V-0 for flammability. Electrical ratings include 3A current per contact and 250V voltage. The operating temperature range spans from -40°C to 105°C, with an insulation height of 0.295 inches (7.50 mm) and mating pin length of 0.228 inches (5.80 mm).

Feature Summary

• Surface mount design with push-pull locking mechanism for secure board attachment.
• Gold-plated square contacts ensure reliable signal transmission in low-noise environments.
• Polyamide insulation provides high thermal stability and UL94 V-0 fire resistance.

Applications

• General-purpose board-to-board interconnections requiring compact SMT headers.
• Consumer electronics assemblies utilizing standard 2.54mm pitch interfaces.
• Industrial control modules needing robust surface-mounted connection points.

Procurement Notes

Verify component authenticity through authorized Harwin distributors or certified partners. Confirm RoHS compliance status and check for recent Product Change Notifications (PCNs) regarding material updates. Ensure storage conditions maintain humidity levels below specified limits to prevent lead oxidation prior to soldering. Validate that the specific lot matches the required revision level for your assembly process.

Selection Notes

Choose this model when a single-row, four-position SMT header is required with high reliability standards. The phosphor bronze contacts offer superior spring properties compared to standard brass alternatives. Consider the 7.50mm insulation height for adequate clearance in dense PCB layouts. Verify compatibility with mating pins having a 5.80mm engagement length to ensure proper mechanical retention.

Part Context

Part of the M20 series, known for high-density interconnect solutions. This specific variant serves as a male header counterpart to M20-786 socket receptacles. It supports automated pick-and-place manufacturing processes due to its tape-and-reel packaging availability. The design emphasizes space-saving characteristics while maintaining electrical integrity across varying thermal cycles.

Replacement Considerations

No direct public substitute part numbers are confirmed for this discontinued item. Evaluate M20-786 series variants with identical pitch and row count. Cross-reference dimensions strictly to ensure mechanical fit within existing PCB footprints. Consult Harwin engineering for potential obsolescence management strategies or approved alternative components.