Harwin M50-3201645 Equivalent & Substitute Parts

Part Overview

The Harwin M50-3201645 is a 32-position receptacle connector with 0.050" (1.27mm) pitch, designed for through-hole, right-angle mounting with solder termination. This connector is part of the Archer M50 series and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for ongoing system support, maintenance, and new design implementations where this connector specification remains applicable.

Substiute Parts

M50-3201645

Harwin Inc.In Stock: 773M50-3201645 Datasheet

Current PartRFQ

M50-3200845

Harwin Inc.In Stock: 1818M50-3200845 Datasheet

MFR RecommendedRFQ

853-43-032-20-001000

Mill-Max Manufacturing Corp.In Stock: 859853-43-032-20-001000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M50-3201645 is determined by the following critical parameters:

Primary Matching Criteria:

• Connector type: Receptacle
• Contact type: Female socket
• Number of positions: 32
• Pitch - mating: 0.050" (1.27mm)
• Number of rows: 2
• Row spacing - mating: 0.050" (1.27mm)
• Mounting type: Through hole, right angle
• Termination: Solder
• Fastening type: Push-pull

Secondary Compatibility Factors:

• Contact finish - mating: Gold
• Operating temperature range
• Material flammability rating: UL94 V-0
• Current rating: 1A

The substitute parts identified meet the primary matching criteria. Variations in secondary parameters such as contact finish thickness, insulation height, contact length, and material composition are acceptable within engineering tolerance for equivalent functionality.

Parameter Comparison

Engineering Selection Recommendations

Harwin M50-3200845 (16-Position Alternative): This part is an active product from the same Archer M50 series and manufacturer. It maintains identical pitch, row spacing, mounting type, and termination specifications. The primary distinction is the reduced position count (16 versus 32). This substitute is applicable only when system requirements permit a 16-position configuration. The part is ROHS3 compliant and maintains the same operating temperature range and flammability rating as the original.

Mill-Max 853-43-032-20-001000 (32-Position Alternative): This part matches the 32-position requirement and maintains critical parameters including pitch, row spacing, mounting type, and termination. It is an active product with extended operating temperature range (-55°C ~ 125°C) and higher current rating (3A). However, this substitute exhibits RoHS non-compliance, which may restrict its use in applications with RoHS requirements. The contact finish thickness on the mating surface is thicker (30.0µin versus 10.0µin), and the insulation height and contact post length differ from the original specification. These variations are within acceptable engineering tolerance for equivalent functionality in board-to-board applications.

Frequently Asked Questions (FAQ)

Q: Can the M50-3200845 (16-position) directly replace the M50-3201645 (32-position)?

A: The M50-3200845 is mechanically and electrically compatible only for applications requiring 16 positions. It cannot serve as a direct replacement for systems designed for 32-position connectivity. Use this substitute only when system redesign to accommodate reduced position count is feasible.

Q: What are the key differences between the Harwin and Mill-Max 32-position alternatives?

A: Both maintain the critical 32-position, 0.050" pitch specification. The Mill-Max part (853-43-032-20-001000) offers extended temperature range and higher current capacity but is RoHS non-compliant. The Harwin M50-3200845 is ROHS3 compliant but limited to 16 positions. For 32-position applications requiring RoHS compliance, the original Harwin M50-3201645 specification should be sourced from available inventory.

Q: Are there mechanical compatibility concerns when substituting the Mill-Max connector?

A: The Mill-Max 853-43-032-20-001000 has minor dimensional variations: insulation height is 0.120" (versus 0.136"), and contact post length is 0.135" (versus 0.094"). These differences may affect PCB layout and mating connector alignment. Verify mechanical fit within your specific application before implementation.

Q: Does RoHS compliance status affect substitution eligibility?

A: RoHS compliance is determined by application requirements and regulatory jurisdiction. The Mill-Max substitute is RoHS non-compliant, which may disqualify it for applications subject to RoHS directives. The Harwin alternatives maintain ROHS3 compliance.

Q: What is the impact of different contact finish thicknesses?

A: The Mill-Max part has 30.0µin (0.76µm) gold plating on the mating surface, compared to 10.0µin (0.25µm) on the original. Thicker plating provides enhanced durability and wear resistance, particularly beneficial for high-cycle mating applications. This represents an improvement over the original specification.

Q: Can the higher current rating of the Mill-Max connector be utilized?

A: The Mill-Max 853-43-032-20-001000 is rated for 3A versus the original 1A rating. The higher current capacity can be utilized if system design permits. However, ensure that all mating components and PCB traces are rated for the intended current level.