MTSW-109-09-T-S-315 Equivalent & Substitute Parts

Part Overview

The MTSW-109-09-T-S-315 is a rectangular connector header manufactured by Samtec Inc. in the Flex Stack, MTSW series. This through-hole connector features 9 positions at 0.100" (2.54mm) pitch and is designed for board-to-board or cable applications. The part is active in production with 1110 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical parameters align with the core specifications, enabling direct replacement in applications where the original part becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	9
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MTSW-109-09-T-S-315 are qualified based on the following core parameters that determine functional equivalence:

Connector Type: Header configuration
Contact Type: Male Pin
Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 9
Number of Rows: 1
Mounting Type: Through Hole
Termination: Solder
Current Rating: 3A minimum
Material Flammability Rating: UL94 V-0

The identified substitutes meet these criteria while maintaining compatibility with standard 2.54mm pitch receptacle connectors. Variations in contact length, contact finish, insulation material, and operating temperature range do not preclude substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Parameter	MTSW-109-09-T-S-315 (Samtec)	61300911121 (Würth Elektronik)	77311-822-09LF (Amphenol ICC)
Manufacturer	Samtec Inc.	Würth Elektronik	Amphenol ICC (FCI)
Series	Flex Stack, MTSW	WR-PHD	BERGSTIK®
Connector Type	Header, Cuttable	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	9	9	9
Number of Rows	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Contact Length - Mating	0.315" (8.00mm)	0.236" (6.00mm)	0.305" (7.75mm)
Contact Finish - Mating	Tin	Gold	Gold or Gold, GXT™
Contact Material	Phosphor Bronze	Copper Alloy	Phosphor Bronze
Insulation Material	Polyester, Glass Filled	Polyamide (PA6T), Nylon 6T	Thermoplastic
Operating Temperature	-55°C ~ 105°C	-40°C ~ 105°C	-65°C ~ 125°C
Current Rating	3A	3A	3A per Contact
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	Not Applicable	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain active production status and meet UL94 V-0 flammability requirements. The MTSW-109-09-T-S-315 and 77311-822-09LF both carry MSL 1 (Unlimited) moisture sensitivity ratings, while the 61300911121 is rated Not Applicable. The 77311-822-09LF offers the widest operating temperature range (-65°C ~ 125°C) compared to the original part (-55°C ~ 105°C), making it suitable for applications requiring extended temperature performance. The 61300911121 operates within a narrower lower temperature range (-40°C minimum) but maintains the same upper limit. All parts are RoHS compliant and carry EAR99 ECCN classification. Selection should be based on specific application requirements regarding contact finish preference (tin versus gold), insulation material compatibility, and operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can the 61300911121 (Würth Elektronik) be used as a direct replacement for the MTSW-109-09-T-S-315?

A: Yes, the 61300911121 qualifies as a substitute based on matching connector type, contact type, pitch, position count, mounting method, and current rating. The primary differences are contact length (6.00mm versus 8.00mm), contact finish (gold versus tin), and insulation material (Polyamide versus Polyester, Glass Filled). The lower operating temperature minimum (-40°C versus -55°C) must be evaluated against application requirements.

Q: What are the key differences between the 77311-822-09LF and the original MTSW-109-09-T-S-315?

A: Both parts share the same pitch, position count, and mounting configuration. The 77311-822-09LF features a wider operating temperature range (-65°C ~ 125°C), gold contact finish, and thermoplastic insulation. Contact length differs (7.75mm versus 8.00mm). Both maintain UL94 V-0 flammability rating and 3A current capacity.

Q: Are there packaging differences between these substitute parts?

A: The MTSW-109-09-T-S-315 is supplied in Bulk packaging. The 61300911121 is also Bulk packaged. The 77311-822-09LF is supplied in Bag packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: Which substitute part has the best contact finish for high-reliability applications?

A: Both the 61300911121 and 77311-822-09LF feature gold contact finish, which provides superior corrosion resistance and lower contact resistance compared to the tin finish of the original MTSW-109-09-T-S-315. Gold-plated contacts are preferred in applications requiring extended shelf life or exposure to corrosive environments.

Q: Do all substitute parts meet the same compliance standards?

A: All three parts are RoHS compliant and carry UL94 V-0 flammability rating. The MTSW-109-09-T-S-315 and 77311-822-09LF are ROHS3 compliant. The 61300911121 is also ROHS3 compliant. All parts are REACH Unaffected or REACH Affected but remain compliant. ECCN classification is EAR99 for all parts.

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