Harwin M50-3604042 Equivalent & Substitute Parts

Part Overview

The Harwin M50-3604042 is a surface mount rectangular connector header with 80 positions at 1.27mm pitch, designed for board-to-board applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The connector features unshrouded male pins with gold-plated mating contacts and tin-plated posts, suitable for applications requiring 1A per contact current capacity and operation across -40°C to 105°C temperature range.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	80
Number of Rows	2
Pitch - Mating	0.050" (1.27mm)
Row Spacing - Mating	0.050" (1.27mm)
Mounting Type	Surface Mount
Termination	Solder
Current Rating	1A
Operating Temperature	-40°C ~ 105°C
Contact Finish - Mating	Gold
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the M50-3604042 is determined by the following critical parameters:

Connector Type & Contact Type: Header with male pins
Position Count & Row Configuration: 80 positions in 2 rows
Pitch Specification: 0.050" (1.27mm) mating pitch and row spacing
Mounting Technology: Surface mount solder termination
Electrical Performance: 1A current rating per contact
Environmental Compliance: UL94 V-0 flammability rating and RoHS compliance

Two substitute parts meet these criteria:

M50-3602042 (Harwin Inc.) - Same series connector with reduced position count (40 positions). Maintains identical pitch, mounting type, and electrical characteristics. Active product status provides long-term availability.
20021121-00080T4LF (Amphenol ICC/FCI) - Direct position-count equivalent (80 positions) from alternative manufacturer. Maintains pitch, row configuration, and mounting specifications. Extended operating temperature range (-55°C ~ 125°C) and active product status.

Parameter Comparison

Parameter	M50-3604042 (Main)	M50-3602042 (Substitute)	20021121-00080T4LF (Substitute)
Manufacturer	Harwin Inc.	Harwin Inc.	Amphenol ICC (FCI)
Product Status	Obsolete	Active	Active
Number of Positions	80	40	80
Number of Rows	2	2	2
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Row Spacing - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Termination	Solder	Solder	Solder
Contact Type	Male Pin	Male Pin	Male Pin
Current Rating	1A	1A	1A per Contact
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C
Contact Finish - Mating	Gold	Gold	Gold
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Packaging	-	Bulk	Tube

Engineering Selection Recommendations

For Direct Replacement (80-Position Requirement):

The 20021121-00080T4LF from Amphenol ICC (FCI) provides the most direct substitution. It maintains the 80-position configuration, identical pitch specifications, and surface mount solder termination. The extended operating temperature range (-55°C ~ 125°C) exceeds the original specification, providing additional thermal margin. Active product status ensures continued availability and supply chain stability. RoHS compliance is confirmed.

For Position-Reduced Applications:

The M50-3602042 from Harwin Inc. remains within the same manufacturer series (Archer M50) and maintains all critical electrical and mechanical parameters. This option is suitable only for applications requiring 40 positions or fewer. Active product status and ROHS3 compliance match the original specification requirements.

Compliance Considerations:

Both substitute parts maintain UL94 V-0 flammability rating and RoHS compliance status. The 20021121-00080T4LF carries REACH Affected status, whereas the original and M50-3602042 are REACH Unaffected. This distinction requires evaluation based on end-use application and regional regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the M50-3602042 be used as a direct replacement for the M50-3604042?

A: The M50-3602042 is not a direct replacement due to position count difference (40 vs. 80). It is suitable only for applications that can operate with half the connector positions while maintaining the same pitch and row spacing.

Q: What are the key compatibility factors between the M50-3604042 and 20021121-00080T4LF?

A: Both connectors share identical position count (80), pitch (1.27mm), row configuration (2 rows), mounting type (surface mount), and termination method (solder). Contact finish, current rating, and flammability rating are equivalent. The primary difference is manufacturer and extended operating temperature range in the Amphenol part.

Q: Does the extended temperature range of the 20021121-00080T4LF affect compatibility?

A: No. The extended operating range (-55°C ~ 125°C) is a superset of the original specification (-40°C ~ 105°C). This provides additional thermal margin without introducing compatibility issues.

Q: Are there packaging differences between the substitute parts?

A: Yes. The M50-3602042 is supplied in bulk packaging, while the 20021121-00080T4LF is supplied in tube packaging. The M50-3604042 packaging is not specified. Packaging selection should align with assembly process requirements and inventory management practices.

Q: What is the significance of REACH status differences?

A: The 20021121-00080T4LF is REACH Affected, while the original M50-3604042 and M50-3602042 are REACH Unaffected. Applications subject to REACH regulations must evaluate this distinction. REACH Affected status does not indicate non-compliance but requires specific documentation and substance declaration procedures.

Q: Can these connectors be intermated with each other?

A: Intermatability depends on the mating connector design. All three connectors feature identical pitch (1.27mm), row spacing (1.27mm), and male pin contact type. Mating compatibility requires verification with the corresponding female connector specifications and mechanical envelope constraints.

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