HTMS-125-02-G-D Equivalent & Substitute Parts

Part Overview

The HTMS-125-02-G-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board applications. This 50-position connector operates across a wide temperature range of -55°C to 125°C and features gold-plated phosphor bronze contacts with a 0.050" (1.27mm) pitch. The part is currently active in production with 905 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component interchangeability in applications where the primary part becomes unavailable or when design requirements permit alternative contact materials or temperature ratings.

Substiute Parts

HTMS-125-02-G-D

Samtec Inc.In Stock: 925HTMS-125-02-G-D Datasheet

Current PartRFQ

6-103916-3

TE Connectivity AMP ConnectorsIn Stock: 21446-103916-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The TE Connectivity AMP Connectors part number 6-103916-3 qualifies as a substitute based on the following critical parameters:

• Identical mating pitch of 0.050" (1.27mm)
• Identical number of positions (50) and row configuration (2 rows)
• Identical row spacing of 0.100" (2.54mm)
• Identical connector type (Header) and contact type (Male Pin)
• Identical mounting method (Through Hole) and termination (Solder)
• Identical style (Board to Board or Cable) and shrouding (Unshrouded)
• Identical contact shape (Square) and insulation color (Black)
• Both parts are ROHS3 compliant with MSL rating of 1
• Both parts carry UL94 V-0 flammability rating

Substitution is valid where the differences in contact materials, contact finish specifications, operating temperature range, and voltage rating do not conflict with the application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-125-02-G-D and 6-103916-3 are active production parts with ROHS3 compliance and UL94 V-0 flammability certification. The primary differences affecting selection are:

The HTMS-125-02-G-D operates across a broader temperature range (-55°C to 125°C) compared to the TE Connectivity substitute (-65°C to 105°C). Applications requiring sustained operation above 105°C or below -65°C must use the Samtec part.

The TE Connectivity 6-103916-3 specifies a 30VAC voltage rating, while the Samtec part does not provide a voltage specification. Applications with defined voltage requirements should reference the TE Connectivity specification.

Contact finish thickness differs between parts. The Samtec HTMS-125-02-G-D uses thinner gold plating on both mating and post contacts, while the TE Connectivity part uses thicker gold on mating contacts and tin on post contacts. These differences may affect contact resistance and durability in high-cycle mating applications.

Insulation material differs: Samtec uses Liquid Crystal Polymer (LCP) while TE Connectivity uses Thermoplastic. Both materials meet UL94 V-0 requirements.

Frequently Asked Questions (FAQ)

Q: Can the 6-103916-3 be used as a direct replacement for the HTMS-125-02-G-D?

A: Yes, for applications where the operating temperature range does not exceed 105°C and the voltage requirement does not exceed 30VAC. The critical mechanical and electrical parameters—pitch, position count, row spacing, contact type, and mounting method—are identical. Verify that your application does not require the extended temperature range of the Samtec part.

Q: What is the impact of different contact finish materials?

A: The Samtec part uses gold on both mating and post contacts, while the TE Connectivity part uses gold on mating contacts and tin on post contacts. Gold provides superior corrosion resistance and lower contact resistance. The TE Connectivity part's thicker gold plating on mating contacts (30.0µin vs. 10.0µin) may provide extended mating cycle life. Select based on your application's mating cycle requirements and environmental exposure.

Q: Are both parts suitable for high-temperature applications?

A: The HTMS-125-02-G-D supports continuous operation up to 125°C, making it suitable for high-temperature environments. The TE Connectivity 6-103916-3 is rated to 105°C maximum. For applications exceeding 105°C, the Samtec part is required.

Q: Do the different insulation materials affect compatibility?

A: Both materials meet UL94 V-0 flammability requirements. Liquid Crystal Polymer (LCP) used in the Samtec part offers superior dimensional stability and lower moisture absorption. Thermoplastic used in the TE Connectivity part is more cost-effective. Both are suitable for standard board-to-board applications. Verify material compatibility with your specific environmental conditions.

Q: What is the difference in current rating between the two parts?

A: The Samtec HTMS-125-02-G-D specifies 5A per contact. The TE Connectivity 6-103916-3 does not provide a current rating specification. For applications requiring defined current capacity, use the Samtec part or contact TE Connectivity for current rating information.

Q: Are both parts available in the same packaging?

A: Yes, both parts are supplied in tube packaging, enabling equivalent handling and storage procedures.