TML-125-03-G-D-RA Equivalent & Substitute Parts

Part Overview

The TML-125-03-G-D-RA is a shrouded rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board applications. This 50-position connector operates across a 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 active in production with 667 units in stock and maintains ROHS3 compliance. Equivalent and substitute parts are identified when they share critical electrical and mechanical parameters including pitch, position count, row configuration, mounting orientation, and contact geometry.

Substiute Parts

TML-125-03-G-D-RA

Samtec Inc.In Stock: 688TML-125-03-G-D-RA Datasheet

Current PartRFQ

104069-2

TE Connectivity AMP ConnectorsIn Stock: 843104069-2 Datasheet

SimilarRFQ

5-104069-2

TE Connectivity AMP ConnectorsIn Stock: 17425-104069-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TML-125-03-G-D-RA are identified based on strict alignment of core electrical and mechanical parameters. The substitution criteria are:

Critical Matching Parameters:

• Pitch - Mating: 0.050" (1.27mm)
• Number of Positions: 50
• Number of Rows: 2
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole, Right Angle
• Connector Type: Header
• Contact Type: Male Pin
• Termination: Solder

The identified substitute parts (104069-2 and 5-104069-2) from TE Connectivity AMP Connectors meet all critical parameters. Both parts are manufactured as AMPMODU System 50 headers with identical pitch, position count, row configuration, and mounting orientation. Differences exist in secondary parameters including shrouding wall count, contact geometry, insulation material composition, and operating temperature range, which do not preclude functional substitution in applications where the TML-125-03-G-D-RA is specified.

Parameter Comparison

Engineering Selection Recommendations

TML-125-03-G-D-RA (Primary Selection): The Samtec TML-125-03-G-D-RA is the specified part with ROHS3 compliance and active production status. It provides a 4-wall shrouded design with extended contact mating length (0.170") and operates across -55°C to 125°C. This part is suitable for applications requiring the full temperature range and enhanced shrouding protection.

5-104069-2 (Preferred Substitute): The TE Connectivity 5-104069-2 is the recommended substitute when TML-125-03-G-D-RA availability is constrained. This part maintains ROHS3 compliance, shares all critical electrical and mechanical parameters, and offers the highest inventory availability (1669 units). The operating temperature range (-65°C to 105°C) covers most standard industrial applications, with the exception of the upper temperature extreme (125°C) of the primary part.

104069-2 (Secondary Substitute): The TE Connectivity 104069-2 is functionally equivalent to 5-104069-2 with identical core specifications. RoHS status is listed as not applicable for this variant. Selection between 104069-2 and 5-104069-2 should be based on specific regulatory requirements and RoHS compliance mandates for the end application.

Substitution Constraints:

• Contact mating length differs (0.170" vs. 0.125"), which may affect mating force and connector engagement depth
• Shrouding wall count reduction (4-wall to 2-wall) may impact EMI shielding characteristics
• Operating temperature upper limit is reduced from 125°C to 105°C in substitute parts
• Contact finish on post differs (Gold vs. Tin or Tin-Lead), affecting solderability and long-term reliability in specific environments

Frequently Asked Questions (FAQ)

Q: Can 104069-2 or 5-104069-2 be used as direct replacements for TML-125-03-G-D-RA?

A: Both TE Connectivity parts share the critical parameters of pitch (0.050"), position count (50), row configuration (2 rows at 0.100" spacing), and mounting type (through-hole right-angle). They are functionally compatible for board-to-board interconnection. However, differences in contact length, shrouding design, and operating temperature range must be evaluated against specific application requirements.

Q: What is the difference between 104069-2 and 5-104069-2?

A: Both parts are identical in electrical and mechanical specifications. The primary difference is RoHS compliance status: 5-104069-2 is ROHS3 compliant, while 104069-2 is listed as not applicable. Selection depends on regulatory requirements for the end product.

Q: Why does the TML-125-03-G-D-RA have a higher operating temperature maximum than the substitute parts?

A: The TML-125-03-G-D-RA operates to 125°C, while TE Connectivity substitutes operate to 105°C. This difference reflects design choices in insulation material and contact geometry. Applications requiring operation above 105°C must use the primary Samtec part.

Q: Are there differences in contact geometry between these parts?

A: Yes. The TML-125-03-G-D-RA features square contacts with 0.170" mating length, while substitute parts use circular contacts with 0.125" mating length. These geometric differences may affect mating force, connector engagement, and mechanical fit within the mating receptacle.

Q: What is the significance of the shrouding wall count difference?

A: The TML-125-03-G-D-RA provides 4-wall shrouding, while substitute parts provide 2-wall shrouding. Four-wall shrouding offers enhanced EMI shielding and mechanical protection. Applications with strict EMI requirements should prioritize the primary part.

Q: How do the contact finish specifications affect performance?

A: The TML-125-03-G-D-RA uses gold finish on both mating and post surfaces. Substitute parts use gold on mating surfaces but tin or tin-lead on post surfaces. Gold provides superior corrosion resistance and long-term reliability in harsh environments. Tin-based finishes are suitable for standard soldering applications but may show oxidation over extended storage or in high-humidity conditions.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring RoHS3 compliance and maximum inventory availability, 5-104069-2 is the recommended selection. For applications requiring the full -55°C to 125°C temperature range or enhanced shrouding, the primary TML-125-03-G-D-RA should be specified.

Q: Are these parts interchangeable in existing PCB designs?

A: Mechanical interchangeability depends on PCB layout and mating receptacle design. The differences in contact length (0.170" vs. 0.125") and insulation height (0.370" vs. 0.290") may require PCB layout verification. Consult the mating receptacle specifications and PCB design documentation before substitution.