M50-3904642 Equivalent & Substitute Parts

Part Overview

The M50-3904642 is a rectangular connector header manufactured by Harwin Inc., part of the Archer M50 series. This is a through-hole, right-angle header with 92 positions at 0.050" (1.27mm) pitch, designed for board-to-board or cable connections. The part is currently obsolete, making identification of suitable substitutes essential for ongoing system support and component procurement.

Substiute Parts

M50-3904642

Harwin Inc.In Stock: 879M50-3904642 Datasheet

Current PartRFQ

M50-3902542

Harwin Inc.In Stock: 1515M50-3902542 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the M50-3904642 is constrained by the following critical parameters:

• Series Compatibility: Both parts must belong to the Harwin Archer M50 series to ensure mechanical and electrical interchangeability
• Pitch Specification: Mating pitch must remain 0.050" (1.27mm) to maintain contact alignment
• Connector Type & Contact Type: Header with male pins is required for board-to-board or cable applications
• Mounting Configuration: Through-hole, right-angle mounting must be preserved
• Electrical Ratings: Operating temperature range and current rating per contact must meet or exceed the original specification
• Compliance: RoHS3 compliance and material flammability rating (UL94 V-0) must be maintained

The M50-3902542 qualifies as a substitute based on these parameters. However, the position count differs: the substitute provides 50 positions versus the original 92 positions. This difference requires design-level evaluation to determine applicability.

Parameter Comparison

Engineering Selection Recommendations

The M50-3902542 is an active product within the same Archer M50 series, providing continuity of supply where the M50-3904642 is no longer available. Both parts maintain identical electrical and thermal specifications, compliance certifications, and contact characteristics.

The primary design consideration is the position count reduction from 92 to 50 positions. This substitution is applicable only when the connector application requires 50 or fewer positions. For applications requiring the full 92-position configuration, alternative solutions within the Archer M50 series or other Harwin rectangular connector families must be evaluated.

Both parts are ROHS3 compliant and UL94 V-0 rated, ensuring regulatory and safety compliance across industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the M50-3902542 be used as a direct replacement for the M50-3904642?

A: The M50-3902542 is mechanically and electrically compatible with the M50-3904642 within the constraints of position count. Direct substitution is valid only if your application uses 50 or fewer of the 92 available positions. If all 92 positions are utilized, this substitute is not suitable.

Q: What are the key compatibility criteria for substituting these connectors?

A: Compatibility is determined by pitch (0.050" / 1.27mm), connector type (header), contact type (male pin), mounting style (through-hole, right-angle), and electrical ratings (1A per contact, -40°C to 105°C). Both parts meet these criteria; position count is the limiting factor.

Q: Why is the M50-3904642 obsolete?

A: Product obsolescence is determined by the manufacturer. The M50-3902542 is the active alternative within the same series, indicating that Harwin has transitioned production focus to this configuration.

Q: Are there compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and rated UL94 V-0. Compliance certifications are identical.

Q: What is the difference in insulation height between these parts?

A: The M50-3904642 has an insulation height of 0.134" (3.40mm), while the M50-3902542 has 0.039" (1.00mm). This reflects the different position counts and physical form factors but does not affect electrical compatibility for applications within the 50-position limit.

Q: Can I use multiple M50-3902542 connectors to achieve 92 positions?

A: Multiple connectors can be used in parallel applications if the circuit design accommodates separate connector instances. This is an application-specific decision requiring circuit-level analysis.