M50-3903642 Equivalent & Substitute Parts

Part Overview

The M50-3903642 is a rectangular connector header manufactured by Harwin Inc., part of the Archer M50 series. This is a through-hole, right-angle header with 72 positions at 0.050" (1.27mm) pitch, designed for board-to-board or cable connections. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

M50-3903642

Harwin Inc.In Stock: 1037M50-3903642 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 M50-3903642. Substitution eligibility is determined by the following critical parameters:

Matching Parameters:

• Manufacturer: Harwin Inc. (same)
• Series: Archer M50 (same)
• Pitch - Mating: 0.050" (1.27mm) (same)
• Contact Type: Male Pin (same)
• Mounting Type: Through Hole, Right Angle (same)
• Termination: Solder (same)
• Operating Temperature: -40°C ~ 105°C (same)
• Current Rating: 1A per Contact (same)
• Contact Finish - Mating: Gold (same)
• Contact Finish - Post: Tin (same)
• Contact Material: Copper Alloy (same)
• Insulation Material: Thermoplastic (same)
• Material Flammability Rating: UL94 V-0 (same)
• RoHS Status: ROHS3 Compliant (same)

Differing Parameter:

• Number of Positions: 72 (M50-3903642) vs. 40 (M50-3902042)

The M50-3902042 is a lower-position-count variant within the same connector family, suitable for applications requiring fewer connection points while maintaining identical electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The M50-3902042 is an active product from the same manufacturer and series, providing regulatory compliance continuity with ROHS3 and REACH certifications matching the obsolete M50-3903642. Selection of the M50-3902042 is appropriate for applications where the 40-position configuration meets connectivity requirements. The identical electrical ratings, operating temperature range, and contact specifications ensure functional compatibility within the design envelope of the original component.

For applications requiring the full 72-position configuration of the original part, alternative solutions outside the Archer M50 series may be necessary.

Frequently Asked Questions (FAQ)

Q: Can the M50-3902042 directly replace the M50-3903642 in existing designs?

A: Direct replacement is possible only if the application requires 40 or fewer connection points. The M50-3902042 maintains identical electrical and mechanical characteristics, including pitch, contact materials, operating temperature, and current rating. PCB layout modifications may be required to accommodate the different position count.

Q: What is the primary difference between these two connectors?

A: The M50-3903642 provides 72 positions while the M50-3902042 provides 40 positions. All other electrical and mechanical parameters are identical, including the 0.050" (1.27mm) mating pitch and through-hole right-angle mounting configuration.

Q: Are there compliance or certification differences?

A: Both connectors share identical compliance status: ROHS3 Compliant, REACH Unaffected, UL94 V-0 flammability rating, and EAR99 ECCN classification.

Q: What is the insulation height difference, and does it affect compatibility?

A: The M50-3903642 has an insulation height of 0.134" (3.40mm), while the M50-3902042 has 0.039" (1.00mm). This dimensional difference reflects the different position counts and may affect PCB clearance considerations during layout design.

Q: Is the M50-3902042 currently available?

A: Yes, the M50-3902042 is an active product with current inventory availability, unlike the obsolete M50-3903642.