TSW-126-07-L-S Equivalent & Substitute Parts

Part Overview

The TSW-126-07-L-S is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This connector features 26 vertical positions with 0.100" (2.54mm) pitch spacing, gold-plated mating contacts, and tin-plated posts for solder termination. The part maintains active product status with 859 units in current inventory.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements permit alternative configurations that meet the same electrical and mechanical interface specifications.

Substiute Parts

TSW-126-07-L-S

Samtec Inc.In Stock: 956TSW-126-07-L-S Datasheet

Current PartRFQ

4-103185-0

TE Connectivity AMP ConnectorsIn Stock: 15934-103185-0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TSW-126-07-L-S is determined by the following critical parameters:

• Pitch - Mating: 0.100" (2.54mm) — must match exactly for mechanical compatibility
• Connector Type: Header configuration for board-to-board or cable applications
• Contact Type: Male pin configuration
• Mounting Type: Through hole termination
• Termination Method: Solder connection
• Contact Finish - Mating: Gold plating for reliable electrical contact

The substitute part 4-103185-0 (TE Connectivity AMP Connectors) shares the same pitch, connector type, contact type, mounting method, and termination approach. However, this part differs in position count (40 vs. 26 positions) and product status (Obsolete vs. Active). Substitution is valid only when the application permits the increased position count and accepts the obsolete status designation.

Parameter Comparison

Engineering Selection Recommendations

The TSW-126-07-L-S remains the preferred selection for new designs due to its active product status and ROHS3 compliance. This part is suitable for applications requiring 26-position connectivity with standard 2.54mm pitch spacing.

The substitute part 4-103185-0 is classified as obsolete and carries no RoHS compliance designation. Selection of this substitute is limited to legacy system maintenance or applications where the increased 40-position configuration and broader operating temperature range (-65°C to 105°C) provide functional advantage despite the reduced upper temperature limit compared to the primary part. The operating temperature range of the substitute (105°C maximum) is lower than the primary part (125°C maximum), which may restrict use in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can 4-103185-0 be used as a direct replacement for TSW-126-07-L-S?

A: Direct replacement is not recommended. The substitute part has 40 positions versus 26 positions in the primary part. Substitution is valid only when the application design accommodates the additional 14 positions and accepts the obsolete product status.

Q: What are the critical compatibility parameters?

A: The 0.100" (2.54mm) pitch, through-hole mounting, solder termination, and male pin contact type are identical between both parts. These parameters ensure mechanical and electrical interface compatibility at the connector level.

Q: Are there temperature rating differences?

A: Yes. The primary part TSW-126-07-L-S operates from -55°C to 125°C, while the substitute 4-103185-0 operates from -65°C to 105°C. Applications requiring operation above 105°C must use the primary part.

Q: What is the significance of the obsolete status for 4-103185-0?

A: Obsolete status indicates the part is no longer in active production. While inventory may be available, future procurement cannot be guaranteed. New designs should specify the active TSW-126-07-L-S to ensure long-term supply chain viability.

Q: Are there RoHS compliance differences?

A: Yes. The TSW-126-07-L-S is ROHS3 compliant. The substitute 4-103185-0 has no RoHS compliance designation. Applications subject to RoHS regulations must use the primary part.

Q: What is the difference between tin and tin-lead post finishes?

A: The primary part uses tin plating on posts, while the substitute uses tin-lead plating. Both are suitable for solder termination. Tin-lead finishes are associated with older manufacturing standards, while tin finishes align with modern lead-free soldering practices.