MTSW-105-09-G-S-350-RA Equivalent & Substitute Parts

Part Overview

The MTSW-105-09-G-S-350-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board or cable applications. This 5-position connector operates across a wide temperature range and is actively supported by the manufacturer. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	5
Number of Rows	1
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Insulation Material	Polyester, Glass Filled
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MTSW-105-09-G-S-350-RA is determined by strict alignment with the following critical parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 5
Number of Rows: 1
Contact Type: Male Pin
Mounting Type: Through Hole, Right Angle
Termination: Solder
Fastening Type: Push-Pull
Contact Shape: Square
Insulation Material: Polyester, Glass Filled
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

The Molex 0901210125 connector meets all critical substitution criteria. Variations in contact finish material, contact finish thickness, contact length specifications, and insulation height are within acceptable tolerance ranges for this connector category and do not preclude functional substitution.

Parameter Comparison

Parameter	MTSW-105-09-G-S-350-RA (Samtec)	0901210125 (Molex)
Manufacturer	Samtec Inc.	Molex
Series	Flex Stack, MTSW	C-Grid III 90121
Connector Type	Header, Cuttable	Header, Breakaway
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	5	5
Number of Rows	1	1
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Tin
Contact Finish Thickness - Mating	10.0µin (0.25µm)	118.1µin (3.00µm)
Contact Length - Mating	0.350" (8.89mm)	0.266" (6.75mm)
Contact Length - Post	0.090" (2.29mm)	0.114" (2.90mm)
Insulation Height	0.119" (3.02mm)	0.142" (3.60mm)
Contact Material	Phosphor Bronze	Brass
Insulation Material	Polyester, Glass Filled	Polyester, Glass Filled
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Operating Temperature	-55°C ~ 125°C	Not specified
Current Rating (Amps)	3A	Not specified
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both the MTSW-105-09-G-S-350-RA and 0901210125 are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The Samtec MTSW-105-09-G-S-350-RA provides gold-plated mating contacts and a specified 3A current rating with documented operating temperature range of -55°C to 125°C. The Molex 0901210125 offers tin-plated contacts with higher contact finish thickness and is available in higher inventory quantities. Selection between these parts should be based on specific application requirements regarding contact finish preference, current handling needs, and temperature operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0901210125 be used as a direct replacement for the Samtec MTSW-105-09-G-S-350-RA?

A: Yes, within the constraints of the specified parameters. Both connectors share identical pitch (2.54mm), position count (5), row configuration (1), contact type (male pin), mounting method (through-hole right-angle), termination (solder), and fastening type (push-pull). Differences in contact finish material and thickness do not preclude functional substitution for standard board-to-board or cable applications.

Q: What are the differences in contact specifications between these two parts?

A: The Samtec part features gold-plated phosphor bronze contacts with 10.0µin thickness and 0.350" mating length. The Molex part features tin-plated brass contacts with 118.1µin thickness and 0.266" mating length. These variations reflect different design approaches within the same connector category and do not affect compatibility at the mating interface.

Q: Are there any temperature or current rating considerations for substitution?

A: The Samtec MTSW-105-09-G-S-350-RA specifies a 3A current rating and -55°C to 125°C operating temperature range. The Molex 0901210125 does not provide published current or temperature specifications in the available data. Applications requiring documented thermal or current performance should reference the Samtec part specifications.

Q: What is the difference between "Cuttable" and "Breakaway" connector types?

A: Both designations indicate the connector can be separated into individual positions. The Samtec Flex Stack series uses "Cuttable" terminology, while the Molex C-Grid III series uses "Breakaway" terminology. Both provide equivalent functionality for applications requiring individual pin isolation.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the MTSW-105-09-G-S-350-RA and 0901210125 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

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