TML-120-03-S-D Equivalent & Substitute Parts

Part Overview

The TML-120-03-S-D is a shrouded rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board applications. This 40-position connector operates across a wide temperature range of -55°C to 125°C and features a 0.050" (1.27mm) pitch with 0.100" (2.54mm) row spacing. The part is currently in active production status with 726 units available in inventory. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where mechanical or electrical parameters allow direct substitution.

Substiute Parts

TML-120-03-S-D

Samtec Inc.In Stock: 830TML-120-03-S-D Datasheet

Current PartRFQ

5-104068-4

TE Connectivity AMP ConnectorsIn Stock: 644685-104068-4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TML-120-03-S-D is evaluated based on the following critical parameters that must align for functional compatibility:

Primary Matching Criteria:

• Connector Type: Header
• Contact Type: Male Pin
• Number of Positions: 40
• Number of Rows: 2
• Pitch - Mating: 0.050" (1.27mm)
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Termination: Solder
• Style: Board to Board

Secondary Compatibility Parameters:

• Operating Temperature Range (must encompass or match the application requirement)
• Contact Finish specifications (Gold mating surface, Tin post finish)
• Insulation Material (LCP or equivalent thermoplastic)
• RoHS Compliance Status

The substitute part 5-104068-4 (TE Connectivity AMP Connectors) satisfies all primary matching criteria. Differences in shrouding design (4-wall vs. 2-wall), contact shape (square vs. circular), and operating temperature range represent design trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

TML-120-03-S-D Selection Criteria:

• Applications requiring operating temperatures above 105°C (up to 125°C)
• Designs specifying Liquid Crystal Polymer insulation material
• Applications requiring 4-wall shrouded connector design
• Designs utilizing square contact geometry
• Phosphor Bronze contact material specifications

5-104068-4 Selection Criteria:

• Applications operating within -65°C to 105°C temperature range
• Designs compatible with thermoplastic insulation material
• Applications where 2-wall shrouded design is acceptable
• Designs utilizing circular contact geometry
• Copper Alloy contact material specifications
• Applications requiring 30VAC voltage rating specification
• Designs supporting both board-to-board and cable connection styles

Both parts maintain ROHS3/RoHS compliance and share identical ECCN and HTSUS classifications, supporting equivalent regulatory and trade compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5-104068-4 directly replace the TML-120-03-S-D in all applications?

A: Direct substitution is possible only when the application requirements accommodate the differences in operating temperature range (-65°C to 105°C vs. -55°C to 125°C), shrouding design (2-wall vs. 4-wall), contact shape (circular vs. square), and insulation material (thermoplastic vs. LCP). Applications requiring temperatures above 105°C require the TML-120-03-S-D.

Q: What is the significance of the shrouding difference between 4-wall and 2-wall designs?

A: The 4-wall shrouding on the TML-120-03-S-D provides enhanced EMI shielding and mechanical protection on all sides. The 2-wall shrouding on the 5-104068-4 provides reduced shrouding coverage. Selection depends on application-specific EMI requirements and mechanical protection needs.

Q: Are the contact geometries interchangeable?

A: The TML-120-03-S-D features square contacts while the 5-104068-4 features circular contacts. While both maintain the same 0.050" (1.27mm) pitch and 0.100" (2.54mm) row spacing, contact geometry differences may affect mating force, contact resistance, and mechanical durability characteristics. Compatibility must be verified against specific mating connector specifications.

Q: What is the impact of different insulation materials?

A: The TML-120-03-S-D uses Liquid Crystal Polymer (LCP) insulation, while the 5-104068-4 uses thermoplastic insulation. LCP typically offers superior thermal stability and dimensional consistency at elevated temperatures. Selection should align with application temperature requirements and environmental exposure conditions.

Q: How do the operating temperature ranges affect substitution decisions?

A: The TML-120-03-S-D operates from -55°C to 125°C, while the 5-104068-4 operates from -65°C to 105°C. Applications requiring sustained operation above 105°C mandate the TML-120-03-S-D. Applications operating within the overlapping range (-55°C to 105°C) may use either part based on other parameter compatibility.

Q: What packaging differences exist between these parts?

A: The TML-120-03-S-D is supplied in Bulk packaging, while the 5-104068-4 is supplied in Tube packaging. Packaging selection affects handling, storage, and automated assembly compatibility. Verify packaging requirements against procurement and assembly specifications.

Q: Are both parts RoHS compliant?

A: Yes. The TML-120-03-S-D is ROHS3 Compliant, and the 5-104068-4 is RoHS Compliant. Both meet current regulatory requirements for hazardous substance restrictions.