TSW-137-07-S-S Equivalent & Substitute Parts

Part Overview

The TSW-137-07-S-S is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 37-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. Substitute parts become necessary when the primary part is unavailable, when design requirements permit higher position counts, or when alternative manufacturers' components meet equivalent electrical and mechanical specifications.

Substiute Parts

TSW-137-07-S-S

Samtec Inc.In Stock: 988TSW-137-07-S-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-137-07-S-S is determined by the following critical parameters:

• Pitch - Mating: Must be 0.100" (2.54mm) to ensure mechanical and electrical compatibility with mating connectors
• Mounting Type: Must be Through Hole to maintain PCB assembly compatibility
• Contact Type: Must be Male Pin to preserve signal integrity and mating interface
• Connector Type: Header configuration required for board-to-board or cable applications
• Contact Finish - Mating: Gold plating required for reliable signal transmission and corrosion resistance
• Insulation Material: PBT or equivalent thermoplastic materials acceptable for environmental and thermal performance
• Operating Temperature Range: Must encompass or exceed -55°C ~ 125°C operational envelope
• Material Flammability Rating: UL94 V-0 compliance required for safety standards

The substitute part 4-103185-0 (TE Connectivity AMP Connectors) meets these core substitution criteria with the following considerations: it provides 40 positions instead of 37, operates within a narrower temperature range (-65°C ~ 105°C), and carries obsolete product status. Position count variance is acceptable when the application permits unused contact positions or when the connector footprint accommodates the additional position.

Parameter Comparison

Engineering Selection Recommendations

The TSW-137-07-S-S remains the preferred selection for new designs due to its active product status and ROHS3 compliance. This ensures long-term availability and regulatory alignment for applications subject to RoHS directives.

The 4-103185-0 substitute is suitable only when the TSW-137-07-S-S is unavailable and the following conditions are met:

• The application can accommodate 40 contact positions instead of 37, either through unused positions or PCB layout modification
• The operating temperature range of -65°C ~ 105°C satisfies the application's thermal requirements (note: the upper temperature limit is 20°C lower than the primary part)
• The design does not require ROHS3 compliance or the application is exempt from RoHS regulations
• The obsolete product status is acceptable for the project lifecycle

The contact post length difference (0.100" versus 0.120") and post finish variation (Tin versus Tin-Lead) require verification against PCB pad specifications and soldering process parameters.

Frequently Asked Questions (FAQ)

Q: Can the 4-103185-0 be used as a direct replacement for the TSW-137-07-S-S?

A: The 4-103185-0 is mechanically and electrically compatible at the 0.100" (2.54mm) pitch interface. However, it provides 40 positions instead of 37. Direct replacement is possible only if the PCB layout accommodates the additional positions or if those positions remain unconnected. The contact post length difference (0.020" longer) must be verified against PCB pad depth specifications.

Q: What are the key differences between these two connectors?

A: The primary differences are: position count (37 vs. 40), operating temperature upper limit (125°C vs. 105°C), product status (Active vs. Obsolete), RoHS compliance (ROHS3 vs. Not applicable), contact post length (0.100" vs. 0.120"), post finish (Tin vs. Tin-Lead), and contact material (Phosphor Bronze vs. Copper Alloy).

Q: Does the position count difference affect compatibility?

A: The pitch remains identical at 0.100" (2.54mm), so the mating interface is compatible. The 40-position connector is physically longer by approximately 0.09" (2.29mm) due to the three additional positions. PCB layout and connector mounting clearance must accommodate this difference.

Q: Are there temperature limitations when substituting?

A: Yes. The TSW-137-07-S-S operates from -55°C to 125°C, while the 4-103185-0 operates from -65°C to 105°C. If the application requires operation above 105°C, the substitute is not suitable. The lower minimum temperature of the substitute (-65°C vs. -55°C) provides additional cold-temperature capability.

Q: What is the impact of the different contact post finishes?

A: The TSW-137-07-S-S uses Tin plating on posts, while the 4-103185-0 uses Tin-Lead plating. Tin-Lead finishes are subject to RoHS restrictions in many jurisdictions. Soldering characteristics may differ slightly; verify compatibility with your specific soldering process and flux chemistry.

Q: Is the 4-103185-0 still available for purchase?

A: The 4-103185-0 carries obsolete product status, indicating it is no longer in active production. Availability is limited to existing inventory from distributors. For new designs, the active TSW-137-07-S-S is the recommended choice to ensure long-term supply chain stability.