MTSW-104-08-L-D-285 Equivalent & Substitute Parts

Part Overview

The MTSW-104-08-L-D-285 is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This vertical 8-position connector operates at 2.54mm pitch and supports 3A current per contact. The part is actively produced and RoHS3 compliant, making it suitable for industrial and commercial electronics applications where board-to-board or cable interconnection is required.

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative connector geometries within the same functional parameters.

Key Parameters

Parameter	Value
Connector Type	Header, Through Hole
Number of Positions	8
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A per Contact
Insulation Material	Polyester, Glass Filled
Operating Temperature Range	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MTSW-104-08-L-D-285 is determined by the following critical parameters:

Connector geometry: 8 positions, 2 rows, 2.54mm pitch, 2.54mm row spacing
Contact configuration: Male pin, square contact shape
Mounting method: Through-hole solder termination
Electrical performance: 3A current rating per contact
Environmental compliance: UL94 V-0 flammability rating, RoHS compliance

The three substitute parts listed below meet these core requirements. Variations in contact length, contact finish thickness, insulation material composition, and operating temperature ranges are permitted within the substitution scope, as these parameters do not affect PCB footprint compatibility or basic electrical function.

Parameter Comparison

Parameter	MTSW-104-08-L-D-285 (Samtec)	77313-122-08LF (Amphenol ICC)	77313-124-08LF (Amphenol ICC)	M20-9760446 (Harwin)
Manufacturer	Samtec Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Harwin Inc.
Series	Flex Stack, MTSW	BERGSTIK®	BERGSTIK®	M20
Number of Positions	8	8	8	8
Number of Rows	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
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
Contact Shape	Square	Square	Square	Square
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Current Rating	3A	3A per Contact	3A per Contact	3A per Contact
Contact Length - Mating	0.285" (7.24mm)	0.305" (7.75mm)	0.266" (6.75mm)	0.228" (5.80mm)
Contact Length - Post	0.145" (3.68mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.122" (3.10mm)
Overall Contact Length	0.530" (13.46mm)	0.526" (13.35mm)	0.480" (12.19mm)	0.452" (11.48mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin
Contact Finish Thickness - Mating	10.0µin (0.25µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	Not specified
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass
Insulation Material	Polyester, Glass Filled	Thermoplastic	Thermoplastic	Polyamide (PA6T), Nylon 6T
Operating Temperature Range	-55°C ~ 125°C	-65°C ~ 130°C	-65°C ~ 130°C	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Affected	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

77313-122-08LF (Amphenol ICC BERGSTIK®): This substitute maintains full compatibility with the MTSW-104-08-L-D-285 across all critical parameters. The part is RoHS compliant, UL94 V-0 rated, and offers an extended operating temperature range (-65°C ~ 130°C). Contact finish thickness is increased to 30.0µin, providing enhanced durability. This part is recommended as the primary substitute when supply of the original part is constrained.

77313-124-08LF (Amphenol ICC BERGSTIK®): This alternative meets all core substitution criteria with identical pitch, row spacing, and current rating. Operating temperature range extends to -65°C ~ 130°C. Note that REACH status is listed as affected for this variant. Contact length dimensions are reduced compared to the main part, which may affect mating depth in applications with tight mechanical tolerances. This part is suitable for applications where contact length variation is acceptable.

M20-9760446 (Harwin M20): This substitute satisfies fundamental connector geometry and electrical requirements. The part is ROHS3 compliant and UL94 V-0 rated. Operating temperature range is -40°C ~ 105°C, which is narrower than the main part. Contact material is brass rather than phosphor bronze, and mating contact finish is tin instead of gold. This part is suitable for applications operating within the -40°C ~ 105°C range where contact finish material differences are acceptable.

Frequently Asked Questions (FAQ)

Q: Can these substitute parts be used interchangeably with the MTSW-104-08-L-D-285 on the same PCB?

A: Yes, all three substitute parts share identical pitch (2.54mm), row spacing (2.54mm), number of positions (8), and mounting type (through-hole solder). PCB footprints are compatible. However, variations in overall contact length may affect mating depth with corresponding receptacles. Verify mechanical clearance in applications with tight spacing constraints.

Q: What are the key differences between the Amphenol ICC and Harwin substitutes?

A: The Amphenol ICC 77313-122-08LF and 77313-124-08LF both feature phosphor bronze contacts with gold finish and extended operating temperature ranges (-65°C ~ 130°C). The Harwin M20-9760446 uses brass contacts with tin finish and operates within -40°C ~ 105°C. Contact length dimensions vary across all three substitutes. Select based on your application's temperature requirements and contact finish specifications.

Q: Are all substitute parts RoHS compliant?

A: The MTSW-104-08-L-D-285, 77313-122-08LF, and M20-9760446 are RoHS3 compliant. The 77313-124-08LF is listed as RoHS affected. Verify compliance requirements for your specific application before selection.

Q: What is the significance of contact finish thickness differences?

A: Contact finish thickness affects durability and wear resistance during mating cycles. The MTSW-104-08-L-D-285 has 10.0µin (0.25µm) gold finish, while the Amphenol ICC substitutes provide 30.0µin (0.76µm), offering enhanced protection. The Harwin part does not specify finish thickness. For high-cycle mating applications, thicker finishes provide longer service life.

Q: Can I use the M20-9760446 in applications requiring the full -55°C ~ 125°C temperature range?

A: No. The M20-9760446 operates within -40°C ~ 105°C. For applications requiring the full -55°C ~ 125°C range of the original part, use either the 77313-122-08LF or 77313-124-08LF, both rated to -65°C ~ 130°C.

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

A: Both types allow individual position separation. The MTSW-104-08-L-D-285 and M20-9760446 are listed as cuttable, while the Amphenol ICC parts are breakaway. Both configurations support the same 8-position, 2-row geometry and are mechanically compatible with standard 2.54mm pitch receptacles.

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