TSW-140-23-S-S Equivalent & Substitute Parts

Part Overview

The TSW-140-23-S-S is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 40-position, single-row connector operates at 0.100" (2.54mm) pitch and features gold-plated mating contacts with tin-plated posts. The part maintains active product status with full inventory availability. Equivalent and substitute parts are identified based on matching electrical and mechanical specifications within the rectangular connector category.

Key Parameters

Parameter	Specification
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
Number of Rows	1
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Gold
Contact Finish - Post	Tin
Insulation Material	Polybutylene Terephthalate (PBT)
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 TSW-140-23-S-S is determined by the following critical parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Row Configuration: 40 positions in single row
Pitch Specification: 0.100" (2.54mm) mating pitch
Mounting & Termination: Through-hole solder termination
Contact Finish: Gold-plated mating surface with tin post finish
Mechanical Compatibility: Square contact shape, unshrouded design
Environmental Compliance: UL94 V-0 flammability rating, MSL 1

The identified substitutes (4-103239-0 and 9-146281-0) from TE Connectivity AMP Connectors series AMPMODU Mod II maintain these core specifications. Both parts are breakaway-style headers with identical pitch, position count, and contact configuration. Variations in insulation material (PBT vs. Thermoplastic vs. LCP) and contact post length (0.115" vs. 0.120") remain within acceptable mechanical tolerances for standard board-to-board applications.

Parameter Comparison

Parameter	TSW-140-23-S-S (Samtec)	4-103239-0 (TE Connectivity)	9-146281-0 (TE Connectivity)
Manufacturer	Samtec Inc.	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Series	TSW	AMPMODU Mod II	AMPMODU Mod II
Product Status	Active	Obsolete	Active
Connector Type	Header	Header, Breakaway	Header, Breakaway
Contact Type	Male Pin	Male Pin	Male Pin
Number of Positions	40	40	40
Number of Rows	1	1	1
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Contact Length - Mating	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.115" (2.92mm)	0.120" (3.05mm)	0.120" (3.05mm)
Overall Contact Length	0.445" (11.30mm)	0.440" (11.18mm)	0.440" (11.18mm)
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.090" (2.29mm)
Contact Shape	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Finish - Post	Tin	Tin-Lead	Tin
Contact Material	Phosphor Bronze	Copper Alloy	Copper Alloy
Insulation Material	Polybutylene Terephthalate (PBT)	Thermoplastic	Liquid Crystal Polymer (LCP)
Operating Temperature Range	-55°C ~ 125°C	-65°C ~ 105°C	-65°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating	Not specified	3A	3A
RoHS Status	ROHS3 Compliant	Not applicable	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	Vendor Undefined	REACH Unaffected

Engineering Selection Recommendations

Primary Selection: 9-146281-0

The 9-146281-0 is the preferred substitute for new designs and production applications. This part maintains active product status, carries RoHS Compliance certification, and provides REACH Unaffected status matching the original TSW-140-23-S-S. The LCP insulation material offers superior thermal and mechanical stability compared to standard thermoplastic. Operating temperature range (-65°C ~ 105°C) covers the majority of industrial applications, with the upper limit difference of 20°C acceptable for most board-to-board connector applications.

Secondary Selection: 4-103239-0

The 4-103239-0 is available as an alternative with higher inventory levels (3740 units). However, this part carries obsolete product status and lacks current RoHS certification documentation. The Thermoplastic insulation material provides adequate performance for standard applications. The Tin-Lead post finish (vs. Tin on the primary substitute) may present compliance considerations in certain regulated environments. This part is suitable for legacy system maintenance or applications where RoHS compliance is not required.

Compatibility Notes

Both substitutes feature breakaway connector design, allowing individual position separation if required. The 0.005" (0.13mm) difference in contact post length and 0.010" (0.25mm) difference in insulation height are within standard PCB design tolerances for through-hole mounting. Gold mating contact finish and 30.0µin thickness specification remain consistent across all three parts, ensuring equivalent electrical performance and contact reliability.

Frequently Asked Questions (FAQ)

Q: Can 9-146281-0 directly replace TSW-140-23-S-S in existing designs?

A: Yes. Both parts share identical pitch (0.100"), position count (40), contact configuration (male pins), and mating contact finish (gold-plated). The 0.005" post length difference and insulation material variation do not affect mechanical fit or electrical performance in standard through-hole applications. PCB footprints designed for TSW-140-23-S-S are compatible with 9-146281-0.

Q: What is the difference between the two TE Connectivity substitutes?

A: The primary difference is product status and compliance. 9-146281-0 is active with RoHS Compliance and REACH Unaffected status. 4-103239-0 is obsolete with undefined RoHS status. Both share identical electrical specifications (3A current rating, -65°C ~ 105°C operating range) and mechanical dimensions. 4-103239-0 uses Thermoplastic insulation and Tin-Lead post finish, while 9-146281-0 uses LCP insulation and Tin post finish.

Q: Are there temperature range limitations when substituting?

A: The TSW-140-23-S-S operates -55°C ~ 125°C, while both TE Connectivity substitutes operate -65°C ~ 105°C. The lower minimum temperature is not a constraint for most applications. The 20°C reduction in maximum operating temperature should be evaluated for high-temperature applications exceeding 105°C. For applications within -55°C ~ 105°C, both substitutes are fully compatible.

Q: Does the breakaway feature of substitute parts affect compatibility?

A: No. The breakaway design of AMPMODU Mod II connectors allows individual position separation but does not affect the connector's function as a 40-position header. The connector operates identically to the non-breakaway TSW-140-23-S-S in standard applications. Breakaway capability provides additional flexibility for custom configurations if required.

Q: What compliance certifications should I verify for my application?

A: All three parts carry UL94 V-0 flammability rating and MSL 1 (unlimited moisture sensitivity). For RoHS-regulated applications, 9-146281-0 (RoHS Compliant) and TSW-140-23-S-S (ROHS3 Compliant) are appropriate. For REACH-regulated applications, TSW-140-23-S-S and 9-146281-0 both carry REACH Unaffected status. 4-103239-0 has undefined REACH status and should not be used in REACH-regulated environments.

Q: Can I use 4-103239-0 in new production designs?

A: 4-103239-0 is classified as obsolete and should be reserved for legacy system maintenance or repair applications only. For new production designs, 9-146281-0 is the recommended substitute, offering active product status, current compliance certifications, and assured long-term availability.

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