MTSW-120-23-L-D-240 Equivalent & Substitute Parts

Part Overview

The MTSW-120-23-L-D-240 is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 40-position, 2-row connector operates within the -55°C to 125°C temperature range and is rated for 3A per contact. The part is currently active in production and RoHS3 compliant, making it suitable for modern electronic assemblies requiring board-to-board or cable interconnection.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part's specifications, enabling direct replacement in applications where the core functional requirements remain constant.

Key Parameters

Parameter	Value
Connector Type	Header, Through Hole
Number of Positions	40
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Operating Temperature Range	-55°C ~ 125°C
Contact Material	Phosphor Bronze
Contact Finish - Mating	Gold
Insulation Material	Polyester, Glass Filled
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following core parameters:

Connector Configuration: 40 positions, 2 rows, 0.100" (2.54mm) pitch
Contact Type: Male pin, through-hole solder termination
Electrical Rating: 3A per contact minimum
Operating Temperature: Minimum -55°C lower bound and 105°C upper bound
Compliance: RoHS compliance status
Mechanical Compatibility: Board-to-board or cable style, unshrouded, push-pull fastening

The following parts meet these substitution criteria:

2-87227-0 (TE Connectivity AMP Connectors, AMPMODU Mod II series)
77313-122-40LF (Amphenol ICC, BERGSTIK® series)
77313-124-40LF (Amphenol ICC, BERGSTIK® series)
M20-9762042 (Harwin Inc., M20 series)
M20-9762046 (Harwin Inc., M20 series)

Parameter Comparison

Parameter	MTSW-120-23-L-D-240	2-87227-0	77313-122-40LF	77313-124-40LF	M20-9762042	M20-9762046
Manufacturer	Samtec Inc.	TE Connectivity	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Harwin Inc.	Harwin Inc.
Series	Flex Stack, MTSW	AMPMODU Mod II	BERGSTIK®	BERGSTIK®	M20	M20
Number of Positions	40	40	40	40	40	40
Number of Rows	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Current Rating (Amps)	3A	3A	3A per Contact	3A per Contact	3A per Contact	3A per Contact
Operating Temperature	-55°C ~ 125°C	-65°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C	-40°C ~ 105°C	-40°C ~ 105°C
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Brass
Contact Finish - Mating	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold	Tin
Contact Finish - Post	Tin	Gold	Tin	Tin	Tin	Tin
Insulation Material	Polyester, Glass Filled	Thermoplastic	Thermoplastic	Thermoplastic	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain active production status and meet RoHS compliance requirements, ensuring regulatory alignment with the MTSW-120-23-L-D-240.

2-87227-0 (TE Connectivity) operates within -65°C to 105°C, providing extended low-temperature capability but with a reduced upper temperature limit of 105°C compared to the main part's 125°C. The insulation height is 0.090" (2.29mm), which differs from the standard 0.100" (2.54mm). Contact finish on the post is gold rather than tin.

77313-122-40LF and 77313-124-40LF (Amphenol ICC BERGSTIK® series) both support the extended operating range of -65°C to 130°C, exceeding the main part's upper temperature specification. Both maintain standard 0.100" (2.54mm) insulation height and tin post finish. The primary difference between these two parts is contact length: 77313-122-40LF has 0.305" (7.75mm) mating contact length, while 77313-124-40LF has 0.266" (6.75mm) mating contact length.

M20-9762042 and M20-9762046 (Harwin M20 series) operate within -40°C to 105°C, with a higher minimum temperature limit and reduced upper temperature limit compared to the main part. M20-9762042 features gold mating contact finish, while M20-9762046 features tin mating contact finish. Both use brass contact material instead of phosphor bronze.

Frequently Asked Questions (FAQ)

Q: Can 2-87227-0 be used as a direct replacement for MTSW-120-23-L-D-240?

A: 2-87227-0 meets the core connector configuration requirements (40 positions, 2 rows, 0.100" pitch, 3A rating). However, the insulation height of 0.090" (2.29mm) differs from the standard 0.100" (2.54mm), and the operating temperature upper limit is 105°C versus 125°C for the main part. Application-specific thermal requirements must be evaluated.

Q: What is the difference between 77313-122-40LF and 77313-124-40LF?

A: Both parts are BERGSTIK® series connectors with identical electrical and mechanical specifications. The primary distinction is mating contact length: 77313-122-40LF provides 0.305" (7.75mm) contact length, while 77313-124-40LF provides 0.266" (6.75mm) contact length. Selection depends on the mating connector depth requirements.

Q: Are the Harwin M20 series parts suitable for high-temperature applications?

A: The M20-9762042 and M20-9762046 operate within -40°C to 105°C, which is narrower than the MTSW-120-23-L-D-240 range of -55°C to 125°C. These parts are not suitable for applications requiring operation below -40°C or above 105°C.

Q: What is the significance of contact material differences between phosphor bronze and brass?

A: Both phosphor bronze and brass are acceptable contact materials for 0.100" pitch connectors rated at 3A. The choice between them is determined by application-specific requirements such as spring force, wear resistance, and cost considerations. Both materials are provided in the substitute parts list based on their electrical equivalence.

Q: Do all substitute parts have the same contact finish specifications?

A: No. The main part features gold mating finish with 10.0µin (0.25µm) thickness and tin post finish. Substitute parts vary: 2-87227-0 has gold post finish; 77313-122-40LF and 77313-124-40LF have tin post finish with 78.7µin (2.00µm) thickness; M20-9762042 has gold mating finish; M20-9762046 has tin mating finish. Contact finish selection affects corrosion resistance and mating force characteristics.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitute parts are RoHS compliant. The main part is ROHS3 compliant, while TE Connectivity and Amphenol ICC parts are RoHS compliant, and Harwin parts are ROHS3 compliant. All meet regulatory requirements for lead-free assembly.

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