MTMM-104-04-S-S-138 Equivalent & Substitute Parts

Part Overview

The MTMM-104-04-S-S-138 is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This vertical 4-position connector operates at 0.079" (2.00mm) pitch and supports board-to-board or cable connections with solder termination. The part is currently active in production with 799 units in stock. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits component substitution within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	4
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Contact Finish - Mating	Gold
Contact Material	Phosphor Bronze
Insulation Material	Liquid Crystal Polymer (LCP)
Material Flammability Rating	UL94 V-0
Insulation Color	Black
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MTMM-104-04-S-S-138 is determined by strict alignment of the following critical parameters:

Connector pitch: 0.079" (2.00mm) mating pitch
Position count: 4 positions in a single row
Contact type: Male pin configuration
Mounting method: Through-hole solder termination
Fastening mechanism: Push-pull fastening
Contact finish: Gold-plated mating surface
Contact material: Phosphor bronze
Flammability compliance: UL94 V-0 rating
RoHS compliance: ROHS3 Compliant status

The M22-2510405 from Harwin Inc. meets these core substitution criteria. Both parts share identical mating pitch, position count, contact type, mounting method, termination style, and compliance certifications. Variations in contact length, insulation material composition, and current rating specifications are documented in the parameter comparison table below.

Parameter Comparison

Parameter	MTMM-104-04-S-S-138 (Samtec)	M22-2510405 (Harwin)
Manufacturer	Samtec Inc.	Harwin Inc.
Series	MTMM	M22
Connector Type	Header, Cuttable	Header, Cuttable
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Number of Positions	4	4
Number of Rows	1	1
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Length - Mating	0.138" (4.60mm)	0.138" (4.60mm)
Contact Length - Post	0.126" (3.20mm)	0.091" (2.30mm)
Overall Contact Length	0.323" (8.20mm)	0.287" (7.30mm)
Insulation Height	0.059" (1.50mm)	0.059" (1.50mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Material	Phosphor Bronze	Phosphor Bronze
Insulation Material	Liquid Crystal Polymer (LCP)	Polyamide (PA6T), Nylon 6T
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Current Rating	3A	1A per Contact
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both the MTMM-104-04-S-S-138 and M22-2510405 are active production parts with ROHS3 compliance and UL94 V-0 flammability ratings. Selection between these parts is based on application-specific requirements:

The MTMM-104-04-S-S-138 supports a 3A current rating and operates across an extended temperature range of -55°C to 125°C, making it suitable for high-current or wide-temperature-range applications. The M22-2510405 is rated for 1A per contact with an operating temperature range of -40°C to 105°C. The M22-2510405 features a shorter post length (0.091" versus 0.126") and uses polyamide insulation material instead of liquid crystal polymer. Both parts maintain identical mating pitch, position count, and contact geometry, ensuring mechanical and electrical compatibility within their respective current and temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the M22-2510405 directly replace the MTMM-104-04-S-S-138 in all applications?

A: Direct replacement is possible when the application current requirement does not exceed 1A per contact and the operating temperature range remains within -40°C to 105°C. The M22-2510405 has a shorter post length (0.091" versus 0.126"), which may affect PCB layout and solder joint geometry. Verify post length compatibility with your board design before substitution.

Q: What are the key differences between these two connector headers?

A: The primary differences are current rating (3A versus 1A per contact), operating temperature range (-55°C to 125°C versus -40°C to 105°C), contact post length (0.126" versus 0.091"), and insulation material (LCP versus polyamide). Mating pitch, position count, contact type, and mounting method are identical.

Q: Are both parts RoHS compliant?

A: Yes, both the MTMM-104-04-S-S-138 and M22-2510405 are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What is the significance of the contact post length difference?

A: The contact post length affects solder joint formation and PCB hole engagement depth. The MTMM-104-04-S-S-138 has a longer post (0.126") compared to the M22-2510405 (0.091"). This difference may impact solder fillet quality and mechanical strength depending on PCB thickness and hole design.

Q: Can these connectors be used in high-temperature applications?

A: The MTMM-104-04-S-S-138 supports continuous operation up to 125°C, suitable for high-temperature environments. The M22-2510405 is rated to 105°C maximum, limiting its use in applications requiring extended high-temperature operation.

Q: What insulation materials are used in each connector?

A: The MTMM-104-04-S-S-138 uses Liquid Crystal Polymer (LCP) insulation, while the M22-2510405 uses Polyamide (PA6T), Nylon 6T. Both materials meet UL94 V-0 flammability requirements.

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