TSW-140-08-G-S-RA Equivalent & Substitute Parts

Part Overview

The TSW-140-08-G-S-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board or cable applications. This 40-position connector operates at 0.100" (2.54mm) pitch and features gold-plated phosphor bronze contacts with solder termination. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts become necessary when addressing obsolescence concerns, supply chain constraints, or specific application requirements that align with the established electrical and mechanical parameters.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Length - Mating	0.230" (5.84mm)
Contact Length - Post	0.090" (2.29mm)
Contact Finish - Mating	Gold
Insulation Material	Polybutylene Terephthalate (PBT)
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TSW-140-08-G-S-RA is determined by strict alignment with the following critical parameters:

40-position connector configuration
0.100" (2.54mm) mating pitch
Male pin contact type
Through-hole, right-angle mounting
Solder termination
0.230" (5.84mm) mating contact length
0.090" (2.29mm) post contact length
Gold mating contact finish
Square contact shape
UL94 V-0 flammability rating
Board-to-board or cable style application

The substitute part 4-103765-0 (TE Connectivity AMP Connectors AMPMODU Mod II series) satisfies these core mechanical and electrical parameters, enabling functional equivalence in applications where the specified dimensional and contact characteristics are required.

Parameter Comparison

Parameter	TSW-140-08-G-S-RA (Samtec)	4-103765-0 (TE Connectivity)
Connector Type	Header	Header, Breakaway
Contact Type	Male Pin	Male Pin
Number of Positions	40	40
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder
Contact Length - Mating	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.090" (2.29mm)	0.090" (2.29mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Material Flammability Rating	UL94 V-0	UL94 V-0
Operating Temperature	-55°C ~ 125°C	-65°C ~ 105°C
Product Status	Active	Obsolete
RoHS Status	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

The TSW-140-08-G-S-RA remains the primary selection for new designs and applications requiring active product status and full RoHS3 compliance. The part's ROHS3 Compliant designation and Active product status support long-term supply chain stability and regulatory alignment.

The substitute part 4-103765-0 shares identical mechanical and contact specifications but carries Obsolete product status and RoHS non-compliant certification. This part is suitable only for legacy system maintenance, repair, or applications where RoHS compliance is not a requirement. The operating temperature range of 4-103765-0 (-65°C ~ 105°C) is narrower than the primary part, restricting its use in applications requiring the full -55°C ~ 125°C operating window.

Frequently Asked Questions (FAQ)

Q: What determines if a connector can substitute for the TSW-140-08-G-S-RA?

A: Substitutes must maintain identical 40-position configuration, 0.100" (2.54mm) pitch, male pin contacts, through-hole right-angle mounting, solder termination, and matching contact dimensions (0.230" mating length, 0.090" post length). Gold mating finish and square contact shape are also required for functional equivalence.

Q: Can 4-103765-0 be used in new product designs?

A: No. The 4-103765-0 carries Obsolete product status and RoHS non-compliant certification, making it unsuitable for new designs. It is restricted to legacy system support where RoHS compliance is not mandated.

Q: Are there temperature operating range differences between these parts?

A: Yes. The TSW-140-08-G-S-RA operates from -55°C to 125°C, while 4-103765-0 operates from -65°C to 105°C. Applications requiring the full -55°C ~ 125°C range must use the primary part.

Q: What is the significance of the breakaway feature on 4-103765-0?

A: The breakaway feature on the AMPMODU Mod II series allows individual pins to be separated from the connector body. This does not affect core substitution eligibility but may influence mechanical handling and assembly procedures in specific applications.

Q: How do contact finish specifications affect substitution?

A: Both parts feature gold mating contact finish, ensuring equivalent electrical performance and corrosion resistance at the mating interface. Post contact finish differs (gold on primary part, tin-lead on substitute), but this does not affect mating compatibility.

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