Harwin M50-3601842 Equivalent & Substitute Parts

Part Overview

The Harwin M50-3601842 is a surface mount rectangular connector header with 36 positions at 1.27mm pitch, designed for board-to-board or cable applications. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter tolerances for this connector category.

Substiute Parts

M50-3601842

Harwin Inc.In Stock: 928M50-3601842 Datasheet

Current PartRFQ

M50-3600942

Harwin Inc.In Stock: 954M50-3600942 Datasheet

MFR RecommendedRFQ

20021121-00036T4LF

Amphenol ICC (FCI)In Stock: 160020021121-00036T4LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M50-3601842 are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Pitch - Mating: 0.050" (1.27mm) — must match exactly for PCB footprint compatibility
• Row Spacing - Mating: 0.050" (1.27mm) — must match for dual-row alignment
• Contact Type: Male Pin — determines mating interface
• Mounting Type: Surface Mount — determines assembly process compatibility
• Termination: Solder — determines connection method
• Material Flammability Rating: UL94 V-0 — ensures regulatory compliance

Secondary Compatibility Criteria:

• Contact Finish - Mating: Gold — ensures signal integrity and corrosion resistance
• Current Rating: 1A minimum — ensures electrical performance under load
• Operating Temperature Range: must encompass or match the application requirement

The M50-3600942 (Harwin, 18-position) shares identical pitch, row spacing, mounting type, and termination characteristics but differs in position count, making it suitable only for applications requiring 18 positions or fewer. The 20021121-00036T4LF (Amphenol ICC, 36-position) matches the position count and all primary compatibility criteria, providing direct functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

M50-3600942 (Harwin Inc., 18-position): This part is recommended only for applications where the connector requirement is 18 positions or fewer. While it maintains identical pitch, row spacing, mounting type, and termination specifications, the reduced position count limits its use to designs that do not require the full 36-position capacity. This part carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

20021121-00036T4LF (Amphenol ICC, 36-position): This part provides direct functional equivalence to the M50-3601842 in terms of position count, pitch, row spacing, and mounting characteristics. The contact length difference of 0.002" (0.05mm) falls within typical manufacturing tolerances for this connector category. This part carries Active product status and RoHS compliance. The extended operating temperature range (-55°C ~ 125°C) provides additional thermal margin compared to the main part specification (-40°C ~ 105°C). REACH Affected status requires verification against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the M50-3600942 be used as a direct replacement for the M50-3601842?

A: No. The M50-3600942 has 18 positions while the M50-3601842 has 36 positions. Direct substitution is only possible if your application requires 18 or fewer signal connections. PCB footprint and connector housing will not be compatible for the full 36-position design.

Q: Is the 20021121-00036T4LF a pin-compatible replacement?

A: Yes. The 20021121-00036T4LF maintains the same 36-position count, 1.27mm pitch, 2-row configuration, and surface mount solder termination as the M50-3601842. The contact length difference of 0.002" is within standard manufacturing tolerance for this connector class.

Q: What is the impact of the contact length difference between M50-3601842 and 20021121-00036T4LF?

A: The M50-3601842 has a mating contact length of 0.118" (3.00mm) while the 20021121-00036T4LF has 0.120" (3.05mm). This 0.002" difference is negligible for standard board-to-board applications and does not affect electrical performance or mechanical fit within typical PCB design tolerances.

Q: Are there packaging differences between the substitute parts?

A: Yes. The M50-3600942 is supplied in Bulk packaging, while the 20021121-00036T4LF is supplied in Tube packaging. Packaging selection may affect handling, storage, and assembly line integration but does not impact electrical or mechanical compatibility.

Q: What compliance certifications apply to each part?

A: All three parts carry UL94 V-0 material flammability rating. The M50-3601842 and M50-3600942 are ROHS3 Compliant. The 20021121-00036T4LF is RoHS Compliant and REACH Affected. Verify REACH compliance requirements for your specific application and end-use region.

Q: Can I use the 20021121-00036T4LF in applications requiring the -40°C ~ 105°C temperature range?

A: Yes. The 20021121-00036T4LF operating temperature range of -55°C ~ 125°C fully encompasses the -40°C ~ 105°C specification of the M50-3601842, providing additional thermal margin.