MTSW-109-08-G-S-240 Equivalent & Substitute Parts

Part Overview

The MTSW-109-08-G-S-240 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 with male pin contacts, gold-plated mating surfaces, and phosphor bronze contact material. The connector is actively produced and widely used in board-to-board and cable applications requiring reliable solder termination and push-pull fastening.

Equivalent and substitute parts are identified when design requirements change, supply constraints occur, or alternative sourcing becomes necessary while maintaining electrical and mechanical compatibility within specified tolerances.

Substiute Parts

MTSW-109-08-G-S-240

Samtec Inc.In Stock: 1155MTSW-109-08-G-S-240 Datasheet

Current PartRFQ

61300911121

Würth ElektronikIn Stock: 240761300911121 Datasheet

SimilarRFQ

68000-109HLF

Amphenol ICC (FCI)In Stock: 184268000-109HLF Datasheet

SimilarRFQ

A2-9PA-2.54DSA(71)

Hirose Electric Co LtdIn Stock: 797A2-9PA-2.54DSA(71) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MTSW-109-08-G-S-240 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 9
• Pitch - Mating: 0.100" (2.54mm)
• Contact Type: Male Pin
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Finish - Mating: Gold
• Current Rating: 3A minimum
• Material Flammability Rating: UL94 V-0

Allowable Variation Parameters:

• Contact Length - Mating: ±0.010" tolerance acceptable for mechanical fit
• Contact Length - Post: ±0.010" tolerance acceptable for solder joint formation
• Overall Contact Length: Variation acceptable if mating and post lengths remain within tolerance
• Operating Temperature Range: Substitute must support minimum -40°C to 85°C; extended ranges acceptable
• Contact Material: Phosphor Bronze, Copper Alloy, or Brass acceptable
• Insulation Material: Polyester Glass Filled, Polyamide (PA6T), or Polybutylene Terephthalate (PBT) acceptable
• Contact Finish Thickness - Mating: Variation acceptable if minimum 8.0µin (0.203µm) maintained
• RoHS Status: ROHS3 Compliant or RoHS Compliant acceptable

Three substitute parts meet these criteria: 61300911121 (Würth Elektronik), 68000-109HLF (Amphenol ICC), and A2-9PA-2.54DSA(71) (Hirose Electric).

Parameter Comparison

Engineering Selection Recommendations

61300911121 (Würth Elektronik WR-PHD Series)

This substitute maintains full electrical compatibility with 3A current rating and 250V voltage specification. The connector operates within -40°C to 105°C, which covers the primary operating range of the original part. ROHS3 compliance and REACH Unaffected status align with regulatory requirements. Contact length variations are within acceptable mechanical tolerance for standard PCB applications. Copper alloy contact material and Polyamide insulation provide equivalent performance characteristics. This part is suitable for direct substitution in applications not requiring the extended -55°C lower temperature limit.

68000-109HLF (Amphenol ICC BERGSTIK® II Series)

This substitute provides the widest operating temperature range (-65°C to 125°C), matching or exceeding the original part specification. Phosphor bronze contact material and 30.0µin gold finish thickness exceed the original specification, providing enhanced durability. The 3A per contact current rating meets requirements. RoHS compliance is confirmed. Contact length variations are within acceptable tolerance. REACH Affected status requires verification against specific application regulatory requirements. This part is suitable for applications requiring extended temperature performance or enhanced contact durability.

A2-9PA-2.54DSA(71) (Hirose Electric A2 Series)

This substitute maintains 3A current rating and 200V voltage specification. Operating temperature range of -55°C to 85°C covers the primary operating window but does not extend to the original part's 125°C upper limit. Brass contact material and Polybutylene Terephthalate insulation provide equivalent performance. RoHS compliance is confirmed. Contact length variations are within acceptable mechanical tolerance. This part is suitable for applications operating within -55°C to 85°C temperature range where the upper temperature limit does not exceed 85°C.

Frequently Asked Questions (FAQ)

Q: Can I use 61300911121 as a direct replacement for MTSW-109-08-G-S-240?

A: Yes, for applications operating within -40°C to 105°C. The 61300911121 maintains identical pitch (2.54mm), position count (9), contact type (male pin), and current rating (3A). Contact length variations are within acceptable mechanical tolerance for standard PCB mounting. Verify that your application does not require operation below -40°C.

Q: What is the primary difference between the three substitute parts?

A: Operating temperature range is the primary differentiator. The 68000-109HLF supports -65°C to 125°C (widest range), the MTSW-109-08-G-S-240 and A2-9PA-2.54DSA(71) support -55°C to 85°C and -55°C to 125°C respectively. Contact length variations also differ: the original part has longer overall contact length (0.530") compared to substitutes (0.425" to 0.454"). All three maintain identical pitch, position count, and current rating.

Q: Are there packaging differences I should consider?

A: Yes. The MTSW-109-08-G-S-240 ships in Bulk packaging. The 61300911121 and A2-9PA-2.54DSA(71) also ship in Bulk. The 68000-109HLF ships in Bag packaging. Verify your assembly process requirements for packaging format compatibility.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. The MTSW-109-08-G-S-240, 61300911121, and A2-9PA-2.54DSA(71) are ROHS3 Compliant or RoHS Compliant. The 68000-109HLF is RoHS Compliant with REACH Affected status. Verify REACH compliance requirements for your specific application and end market.

Q: Can I use these parts interchangeably on the same PCB?

A: Mechanical interchangeability is confirmed for all four parts due to identical pitch (2.54mm), position count (9), and mounting type (through hole). However, contact length variations may affect solder joint formation and mechanical engagement depth. Verify PCB pad depth and connector socket specifications before mixing parts on the same board.

Q: Which substitute part has the best contact durability?

A: The 68000-109HLF features 30.0µin (0.76µm) gold finish thickness on mating contacts, which exceeds the original part's 10.0µin (0.25µm) specification. This provides enhanced wear resistance for high-cycle mating applications. The 61300911121 and A2-9PA-2.54DSA(71) have lower or unspecified finish thickness values.

Q: What voltage ratings apply to these connectors?

A: The MTSW-109-08-G-S-240 does not specify a voltage rating. The 61300911121 is rated 250V, the 68000-109HLF does not specify a rating, and the A2-9PA-2.54DSA(71) is rated 200V. All parts maintain 3A current rating. Verify your application voltage requirements against the specified ratings.