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

Part Overview

The TSW-126-07-S-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board or cable applications. This vertical header features 52 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing. The connector is currently in active production status with gold-plated mating contacts and tin-plated posts, suitable for operating temperatures from -55°C to 125°C.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative contact configurations or electrical ratings. The identified substitute maintains core mechanical compatibility while introducing variations in position count and electrical specifications.

Substiute Parts

TSW-126-07-S-D

Samtec Inc.In Stock: 1023TSW-126-07-S-D Datasheet

Current PartRFQ

4-103186-0

TE Connectivity AMP ConnectorsIn Stock: 1263394-103186-0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Mechanical Compatibility Requirements:

• Pitch - Mating: 0.100" (2.54mm)
• Number of Rows: 2
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull

Electrical & Environmental Compatibility:

• Contact Type: Male Pin
• Contact Finish - Mating: Gold
• Material Flammability Rating: UL94 V-0
• Operating Temperature Range: -55°C ~ 125°C minimum

The identified substitute part 4-103186-0 maintains mechanical pitch and row spacing compatibility, allowing physical mating with corresponding receptacles designed for 2.54mm pitch connectors. However, this substitute differs in position count (80 vs. 52 positions) and introduces variations in contact post length, insulation height, and operating temperature range, requiring design-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (TSW-126-07-S-D): The TSW-126-07-S-D remains the preferred selection for new designs. This part maintains active production status, ROHS3 compliance, and REACH unaffected designation, ensuring regulatory alignment with current environmental standards. The higher operating temperature maximum of 125°C and thicker gold plating (30.0µin) provide enhanced reliability for demanding thermal environments.

Substitute Part (4-103186-0): The 4-103186-0 is classified as obsolete and exhibits RoHS non-compliance with vendor-undefined REACH status. This substitute is suitable only for legacy system maintenance or applications where regulatory compliance is not a requirement. The lower maximum operating temperature (105°C) and tin-lead post finish restrict its use in temperature-sensitive applications. The increased position count (80 vs. 52) necessitates PCB layout modification and may introduce unused contact positions in the design.

Frequently Asked Questions (FAQ)

Q: Can the 4-103186-0 directly replace the TSW-126-07-S-D in existing designs?

A: Direct replacement is not recommended without design review. While both connectors share identical 0.100" (2.54mm) pitch and 2-row configuration, the substitute has 80 positions versus 52 positions in the main part. PCB footprint modifications are required. Additionally, the substitute's lower maximum operating temperature (105°C vs. 125°C) and obsolete status present long-term supply and compliance risks.

Q: What are the mechanical compatibility constraints?

A: Mechanical compatibility is maintained through matching pitch (0.100" / 2.54mm), row spacing (0.100" / 2.54mm), and through-hole mounting type. Both connectors feature push-pull fastening and solder termination. However, differences in contact post length (0.100" vs. 0.120") and insulation height (0.100" vs. 0.090") may affect PCB trace routing and clearance calculations.

Q: Are there regulatory or compliance differences?

A: Yes. The TSW-126-07-S-D is ROHS3 compliant with REACH unaffected status, meeting current environmental regulations. The 4-103186-0 is RoHS non-compliant with vendor-undefined REACH status, making it unsuitable for applications subject to EU environmental directives or equivalent regulations.

Q: What is the significance of the contact finish differences?

A: The main part features 30.0µin (0.76µm) gold plating on mating contacts, while the substitute provides 15.0µin (0.38µm). Thicker gold plating offers superior corrosion resistance and contact reliability in high-cycle mating environments. The main part uses tin post finish; the substitute uses tin-lead, which is restricted in RoHS-compliant applications.

Q: Can the substitute be used in high-temperature applications?

A: No. The 4-103186-0 has a maximum operating temperature of 105°C, compared to 125°C for the TSW-126-07-S-D. Applications requiring sustained operation above 105°C must use the primary part or identify alternative solutions.