Harwin M50-3201945 Equivalent & Substitute Parts

Part Overview

The Harwin M50-3201945 is a 38-position receptacle connector featuring 0.050" (1.27mm) pitch, through-hole right-angle mounting, and gold-plated contacts. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The M50-3201945 serves applications in general purpose, medical, and telecommunications sectors where board-to-board or cable connectivity is required.

Substiute Parts

M50-3201945

Harwin Inc.In Stock: 688M50-3201945 Datasheet

Current PartRFQ

M50-3202045

Harwin Inc.In Stock: 1250M50-3202045 Datasheet

MFR RecommendedRFQ

853-83-038-20-001101

Preci-DipIn Stock: 896853-83-038-20-001101 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M50-3201945 is determined by the following critical parameters:

Primary Matching Criteria:

• Connector type: Receptacle
• Contact type: Female socket
• 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
• Contact finish - mating: Gold
• Current rating: 1A
• Material flammability rating: UL94 V-0

Allowable Variations:

• Number of positions: Substitutes may have equal or greater position count
• Insulation height: Minor variations acceptable within mechanical envelope constraints
• Contact length - post: Variations acceptable if solder joint integrity is maintained
• Operating temperature range: Substitutes may have extended range
• Contact finish thickness: Variations acceptable if minimum gold plating is maintained
• Insulation material: Alternative materials acceptable if UL94 V-0 compliance is maintained
• Contact material: Alternative materials acceptable if electrical performance is equivalent

Two substitute parts meet these criteria with documented compatibility.

Parameter Comparison

Engineering Selection Recommendations

M50-3202045 (Harwin Inc.)

This substitute is the manufacturer-recommended alternative. It maintains identical electrical and mechanical specifications to the M50-3201945 with two exceptions: position count increases from 38 to 40, and product status is active. The M50-3202045 shares the same series designation (Archer M50), insulation material, contact material, and all critical mating parameters. ROHS3 compliance and UL94 V-0 flammability rating are maintained. This part is suitable for direct replacement in applications where the additional two positions do not create mechanical or electrical conflicts.

853-83-038-20-001101 (Preci-Dip)

This substitute maintains the original 38-position configuration and all critical mating parameters. The Preci-Dip part differs in contact material (beryllium copper versus phosphor bronze), insulation material (PCT polyester glass-filled versus polyamide), and contact finish thickness (29.5µin versus 10.0µin). Operating temperature range extends to -55°C ~ 125°C. The part is ROHS3 compliant and UL94 V-0 rated. This option is suitable for applications requiring the exact position count and extended temperature performance.

Both substitutes are active products with current inventory availability and full compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the M50-3202045 replace the M50-3201945 in all applications?

A: The M50-3202045 is electrically and mechanically compatible with the M50-3201945 for all standard applications. The primary difference is the increase from 38 to 40 positions. Compatibility depends on whether your PCB layout and mating connector accommodate the additional two positions. If your design uses all 38 positions and the connector footprint is fixed, the extra positions will remain unused but do not affect functionality.

Q: What are the key differences between the Harwin and Preci-Dip substitutes?

A: Both maintain the 0.050" pitch, 2-row configuration, and push-pull fastening. The Harwin M50-3202045 adds two positions (40 total) and maintains identical insulation and contact materials. The Preci-Dip 853-83-038-20-001101 preserves the 38-position count but uses beryllium copper contacts instead of phosphor bronze, PCT polyester insulation instead of polyamide, and provides extended operating temperature range (-55°C to 125°C versus -40°C to 105°C).

Q: Are there packaging differences between these substitutes?

A: The M50-3202045 is supplied in tube packaging, while the 853-83-038-20-001101 is supplied in bulk packaging. Packaging does not affect electrical or mechanical performance.

Q: Which substitute should I select for medical applications?

A: Both substitutes are suitable for medical applications. The M50-3201945 lists medical as an application category. Both the M50-3202045 and 853-83-038-20-001101 maintain ROHS3 compliance and UL94 V-0 flammability rating required for medical device integration.

Q: Does the higher contact finish thickness on the Preci-Dip part affect compatibility?

A: No. The Preci-Dip part features 29.5µin (0.75µm) gold plating on mating contacts compared to 10.0µin (0.25µm) on the original. Increased plating thickness provides enhanced durability and does not affect electrical or mechanical mating characteristics.

Q: Can I use these substitutes interchangeably in the same design?

A: The M50-3202045 and 853-83-038-20-001101 are not directly interchangeable due to position count differences (40 versus 38) and material variations. Select based on your specific PCB layout requirements and performance criteria. If your design accommodates 40 positions, the Harwin substitute is the manufacturer-recommended choice. If you require exactly 38 positions or extended temperature performance, the Preci-Dip option is appropriate.