MTSW-125-08-G-D-315 Equivalent & Substitute Parts

Part Overview

The MTSW-125-08-G-D-315 is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting in board-to-board or cable applications. This vertical 50-position connector operates at 2.54mm pitch and supports 3A current per contact. The part is active in production and RoHS3 compliant. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when specific design requirements necessitate alternative connector specifications.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	50
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Contact Length - Mating	0.315" (8.00mm)
Contact Material	Phosphor Bronze
Contact Finish - Mating	Gold
Current Rating	3A
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MTSW-125-08-G-D-315 is determined by the following critical parameters:

Pitch - Mating: 0.100" (2.54mm) — must match exactly
Number of Positions: 50 — must match exactly
Number of Rows: 2 — must match exactly
Contact Type: Male Pin — must match exactly
Mounting Type: Through Hole — must match exactly
Termination: Solder — must match exactly
Current Rating: 3A minimum — must meet or exceed
Operating Temperature Range: must encompass or exceed -55°C ~ 125°C
Material Flammability Rating: UL94 V-0 — must match or exceed
Contact Material: Phosphor Bronze or equivalent — acceptable alternatives include Brass
Contact Finish - Mating: Gold — must be present

All three substitute parts meet these core substitution criteria. Variations in contact length, insulation material, connector type designation (Breakaway vs. Cuttable), and contact finish thickness are within acceptable engineering tolerances for this application category.

Parameter Comparison

Parameter	MTSW-125-08-G-D-315 (Samtec)	77313-124-50LF (Amphenol ICC)	77314-1ADLF (Amphenol ICC)	A1-50PA-2.54DSA(71) (Hirose)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	50	50	50	50
Number of Rows	2	2	2	2
Row Spacing - Mating	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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Contact Length - Mating	0.315" (8.00mm)	0.266" (6.75mm)	0.305" (7.75mm)	0.236" (6.00mm)
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass
Contact Finish - Mating	Gold	Gold or Gold, GXT™	Gold, GXT™	Gold
Current Rating	3A	3A per Contact	3A	3A
Operating Temperature	-55°C ~ 125°C	-65°C ~ 130°C	-65°C ~ 130°C	-55°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All three substitute parts are active products with established production status and meet the core electrical and mechanical requirements for substitution.

77313-124-50LF and 77314-1ADLF (Amphenol ICC BERGSTIK® series) provide extended operating temperature ranges (-65°C ~ 130°C) compared to the primary part, offering enhanced thermal performance. Both parts maintain RoHS compliance and UL94 V-0 flammability rating. The 77313-124-50LF features all 50 positions loaded, while 77314-1ADLF has 26 positions loaded and is supplied in bag packaging rather than bulk.

A1-50PA-2.54DSA(71) (Hirose A1 series) maintains RoHS3 compliance matching the primary part and provides all 50 positions loaded. This part operates within the same lower temperature range as the primary part (-55°C ~ 85°C) and includes a 200V voltage rating specification. Contact material is brass rather than phosphor bronze, and contact finish thickness on the mating surface is 8.00µin compared to 10.0µin on the primary part.

Frequently Asked Questions (FAQ)

Q: Can 77313-124-50LF be used as a direct replacement for MTSW-125-08-G-D-315?

A: Yes. Both parts share identical pitch (2.54mm), position count (50), row configuration (2), contact type (male pin), mounting method (through hole), and termination (solder). The 77313-124-50LF has a shorter mating contact length (0.266" vs. 0.315") but maintains equivalent electrical performance at 3A current rating. The extended operating temperature range (-65°C ~ 130°C) provides additional thermal margin.

Q: What is the difference between 77313-124-50LF and 77314-1ADLF?

A: Both are Amphenol ICC BERGSTIK® series connectors with identical pitch, row spacing, and electrical ratings. The primary differences are: 77313-124-50LF has all 50 positions loaded and is supplied in bulk packaging; 77314-1ADLF has 26 positions loaded and is supplied in bag packaging. Contact length on the mating surface differs (0.266" vs. 0.305"). Both operate across -65°C ~ 130°C.

Q: Is the A1-50PA-2.54DSA(71) suitable for high-temperature applications?

A: The A1-50PA-2.54DSA(71) operates from -55°C to 85°C, which is narrower than the primary part's -55°C ~ 125°C range. This part is suitable for applications within its specified temperature envelope but does not provide the extended high-temperature capability of the Amphenol ICC alternatives.

Q: Does contact material difference affect substitution compatibility?

A: The primary part uses phosphor bronze contacts; the Hirose A1-50PA-2.54DSA(71) uses brass contacts. Both materials are acceptable for this connector category and maintain equivalent electrical performance at 3A current rating. Contact finish (gold plating) is present on all parts.

Q: Are all substitute parts RoHS compliant?

A: Yes. The primary part is RoHS3 compliant. The Amphenol ICC parts (77313-124-50LF and 77314-1ADLF) are RoHS compliant. The Hirose part (A1-50PA-2.54DSA(71)) is RoHS3 compliant. All parts meet applicable RoHS requirements.

Q: What packaging options are available?

A: MTSW-125-08-G-D-315 is supplied in bulk packaging. 77313-124-50LF is supplied in bulk packaging. 77314-1ADLF is supplied in bag packaging. A1-50PA-2.54DSA(71) is supplied in tray packaging. Packaging selection may affect inventory management and handling procedures.

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