TSW-120-07-S-S Equivalent & Substitute Parts

Part Overview

The TSW-120-07-S-S is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 20-position, single-row header 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 are identified when equivalent electrical and mechanical parameters align within the allowed specifications for this connector category, enabling direct functional replacement in board-to-board or cable applications.

Substiute Parts

TSW-120-07-S-S

Samtec Inc.In Stock: 1114TSW-120-07-S-S Datasheet

Current PartRFQ

4-103239-0

TE Connectivity AMP ConnectorsIn Stock: 37784-103239-0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSW-120-07-S-S are identified based on the following critical parameters that determine functional equivalence:

• Pitch - Mating: 0.100" (2.54mm) — must match exactly for mechanical compatibility
• Connector Type: Header with male pin contacts for board-to-board or cable applications
• Mounting Type: Through Hole solder termination
• Contact Finish: Gold-plated mating surface with tin-based post finish
• Insulation Material: Polybutylene Terephthalate (PBT) or equivalent thermoplastic
• Material Flammability Rating: UL94 V-0 compliance
• Operating Temperature Range: Must support the required thermal envelope

The identified substitute part 4-103239-0 (TE Connectivity AMP Connectors) shares the core electrical and mechanical characteristics required for substitution, though differences in position count, contact post length, and product status must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The TSW-120-07-S-S remains the preferred choice for new designs. It maintains active product status, ROHS3 compliance, and a wider operating temperature range (-55°C to 125°C), making it suitable for applications requiring extended thermal performance and regulatory compliance.

Substitute Consideration: The 4-103239-0 may be evaluated as a substitute only when the following conditions are met:

• The application requires exactly 40 positions or can accommodate a 40-position header with selective use of available contacts
• The operating temperature range of -65°C to 105°C is sufficient for the application
• The slightly longer contact post (0.120" vs. 0.100") and reduced insulation height (0.090" vs. 0.100") do not create mechanical interference with the PCB layout or mating connector
• The product's obsolete status is acceptable for the intended application lifecycle
• RoHS compliance is not a regulatory requirement, as this substitute is not RoHS-certified

The 0.100" (2.54mm) pitch and gold-plated mating contacts ensure electrical compatibility at the interface level. However, the differences in position count, contact post geometry, and product status require explicit design validation before substitution.

Frequently Asked Questions (FAQ)

Q: Can the 4-103239-0 directly replace the TSW-120-07-S-S in a 20-position application?

A: The 4-103239-0 is a 40-position header. Direct replacement is not possible without design modification. If only 20 positions are required, the 40-position part can be used with 20 positions populated, but this introduces unnecessary cost and board space considerations. The TSW-120-07-S-S is the appropriate choice for 20-position applications.

Q: Are there compatibility concerns with the contact post length difference?

A: The 4-103239-0 has a 0.020" (0.51mm) longer contact post (0.120" vs. 0.100") and a 0.010" (0.25mm) lower insulation height (0.090" vs. 0.100"). These dimensional differences may affect PCB hole depth, solder joint formation, and mechanical clearance. Board design must be validated to accommodate these variations.

Q: What is the significance of the product status difference?

A: The TSW-120-07-S-S is active, indicating ongoing manufacturing and supply availability. The 4-103239-0 is obsolete, meaning production has ended and future availability is not guaranteed. For new designs or long-term production requirements, the active part is strongly preferred.

Q: Does the operating temperature range difference affect substitution?

A: The TSW-120-07-S-S operates from -55°C to 125°C, while the 4-103239-0 operates from -65°C to 105°C. The substitute has a lower maximum temperature limit (105°C vs. 125°C). Applications requiring operation above 105°C cannot use the substitute. The main part is required for high-temperature applications.

Q: Are there RoHS compliance implications?

A: The TSW-120-07-S-S is ROHS3 compliant. The 4-103239-0 status is not applicable, indicating it does not meet current RoHS standards. Applications subject to RoHS regulations must use the TSW-120-07-S-S or equivalent compliant parts.

Q: What is the difference between Tin and Tin-Lead contact finishes?

A: The TSW-120-07-S-S uses Tin post finish, while the 4-103239-0 uses Tin-Lead. Tin-Lead finishes are restricted in RoHS-regulated applications. The Tin finish of the main part is compatible with lead-free soldering processes and RoHS compliance requirements.

Q: Can these parts be used interchangeably in existing designs?

A: No. The position count difference (20 vs. 40), dimensional variations in contact geometry, and product status differences require explicit design review and validation. Substitution is not automatic and must be justified by specific application requirements.