M50-3903442 Equivalent & Substitute Parts

Part Overview

The M50-3903442 is a rectangular connector header manufactured by Harwin Inc., part of the Archer M50 series. This is a through-hole, right-angle connector with 68 positions at 0.050" (1.27mm) pitch, designed for board-to-board or cable applications. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

M50-3903442

Harwin Inc.In Stock: 761M50-3903442 Datasheet

Current PartRFQ

M50-3902042

Harwin Inc.In Stock: 1610M50-3902042 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The M50-3902042 is identified as a manufacturer-recommended substitute for the M50-3903442. Substitution eligibility is determined by the following parameters:

Matching Parameters:

• Manufacturer: Harwin Inc.
• Series: Archer M50
• Connector Type: Header
• Contact Type: Male Pin
• Pitch - Mating: 0.050" (1.27mm)
• Row Spacing - Mating: 0.050" (1.27mm)
• Mounting Type: Through Hole, Right Angle
• Termination: Solder
• Contact Length - Mating: 0.150" (3.81mm)
• Contact Length - Post: 0.079" (2.00mm)
• Contact Shape: Square
• Contact Finish - Mating: Gold
• Contact Finish Thickness - Mating: 3.00µin (0.076µm)
• Contact Finish - Post: Tin
• Contact Material: Copper Alloy
• Insulation Material: Thermoplastic
• Operating Temperature: -40°C ~ 105°C
• Current Rating: 1A per Contact
• Material Flammability Rating: UL94 V-0
• Insulation Color: Black
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Differing Parameter:

• Number of Positions: M50-3903442 has 68 positions; M50-3902042 has 40 positions

The M50-3902042 maintains electrical and mechanical compatibility through identical pitch, contact geometry, termination method, and environmental ratings. The reduced position count reflects a lower-density configuration within the same connector family.

Parameter Comparison

Engineering Selection Recommendations

The M50-3902042 is the manufacturer-recommended substitute for the obsolete M50-3903442. Both components maintain identical electrical and mechanical specifications across all critical parameters including pitch, contact geometry, termination method, and environmental operating range. Both parts are ROHS3 compliant and REACH unaffected, ensuring regulatory alignment.

The primary design consideration is the position count difference: the M50-3902042 provides 40 positions compared to the 68 positions of the original part. This substitution is appropriate for applications requiring 40 or fewer signal connections within the same connector footprint and electrical characteristics. For applications requiring the full 68-position configuration, alternative solutions within the Archer M50 series should be evaluated based on specific system requirements.

The M50-3902042 is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete M50-3903442.

Frequently Asked Questions (FAQ)

Q: Can the M50-3902042 be used as a direct replacement for the M50-3903442?

A: The M50-3902042 is electrically and mechanically compatible with the M50-3903442 across all specified parameters. However, the position count differs: 40 positions versus 68 positions. Substitution is valid only if your application requires 40 or fewer connections.

Q: What are the key compatibility factors between these connectors?

A: Compatibility is ensured through matching pitch (0.050" / 1.27mm), contact geometry, termination method (solder), operating temperature range (-40°C to 105°C), current rating (1A), and material specifications. Both use copper alloy contacts with gold mating finish and tin post finish.

Q: Why is the M50-3903442 listed as obsolete?

A: The M50-3903442 has been discontinued by the manufacturer. The M50-3902042 is the recommended active alternative within the Archer M50 series.

Q: Are there any packaging differences between these parts?

A: The M50-3903442 packaging is not specified in the available data. The M50-3902042 is supplied in bulk packaging.

Q: Do both connectors meet the same regulatory standards?

A: Yes. Both the M50-3903442 and M50-3902042 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the primary design limitation when using the M50-3902042 as a substitute?

A: The M50-3902042 accommodates 40 positions in a 2-row configuration, compared to 68 positions in the original part. Applications requiring more than 40 connections will require alternative connector solutions.