HTMS-108-03-T-S-RA Equivalent & Substitute Parts

Part Overview

The HTMS-108-03-T-S-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board applications. This 8-position connector operates at 0.050" (1.27mm) pitch and is rated for 5A per contact with an operating temperature range of -55°C to 105°C. The part is currently active in production and RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters align with the core specifications, enabling component interchangeability in compatible applications.

Substiute Parts

HTMS-108-03-T-S-RA

Samtec Inc.In Stock: 693HTMS-108-03-T-S-RA Datasheet

Current PartRFQ

5-104186-5

TE Connectivity AMP ConnectorsIn Stock: 10245-104186-5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 5-104186-5 (TE Connectivity AMP Connectors) qualifies as an equivalent based on the following critical parameters:

• Connector type, contact type, and fastening mechanism are identical (Header, Male Pin, Push-Pull)
• Mating pitch matches exactly at 0.050" (1.27mm)
• Position count and row configuration are identical (8 positions, 1 row)
• Mounting type and termination method are equivalent (Through Hole, Right Angle; Solder)
• Both parts are unshrouded, board-to-board style connectors
• Both meet UL94 V-0 flammability requirements
• Both are RoHS3 compliant with MSL 1 rating
• Both are active production parts

Substitution is valid where these core parameters determine functional compatibility. Differences in contact finish, insulation material, and dimensional tolerances (contact length, insulation height) must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-108-03-T-S-RA and 5-104186-5 are active production parts with RoHS3 compliance and MSL 1 rating, making them suitable for long-term supply chain stability. The primary differences affecting selection are:

Contact post length differs by 0.040" (1.02mm), with the Samtec part featuring a longer post (0.140" vs 0.100"). This dimension must be verified against PCB thickness and mating connector specifications to ensure proper engagement and solder joint formation.

Contact finish differs (Tin vs Gold), affecting corrosion resistance and contact reliability in different environmental conditions. The TE Connectivity part's gold mating surface provides enhanced corrosion resistance, while the Samtec part's tin finish is suitable for standard industrial applications.

Insulation material differs (LCP vs Thermoplastic), with LCP offering superior thermal and dimensional stability. The TE Connectivity part's thermoplastic insulation is adequate for the specified temperature range but may exhibit greater dimensional variation.

Operating temperature range for the TE Connectivity part extends to -65°C, providing broader low-temperature capability compared to the Samtec part's -55°C minimum.

Selection should be based on specific application requirements regarding post length, environmental exposure, and temperature extremes.

Frequently Asked Questions (FAQ)

Q: Can the 5-104186-5 directly replace the HTMS-108-03-T-S-RA in existing designs?

A: Direct replacement is possible only if the application tolerates the differences in contact post length (0.040" shorter on the TE part), contact finish (Gold vs Tin), and insulation material (Thermoplastic vs LCP). PCB thickness and mating connector specifications must be verified to ensure proper mechanical fit and electrical contact.

Q: What is the significance of the contact post length difference?

A: Contact post length determines how far the pin extends into the PCB. The Samtec part's longer post (0.140") may be required for thicker PCBs or specific mating connector designs. The TE part's shorter post (0.100") is suitable for standard PCB thicknesses but must be verified against your specific board design.

Q: Does the gold finish on the TE Connectivity part provide better performance?

A: Gold plating on mating contacts enhances corrosion resistance and contact reliability in harsh environments or applications with frequent mating cycles. For standard industrial applications with infrequent disconnection, the tin finish on the Samtec part is adequate. Selection depends on environmental exposure and reliability requirements.

Q: Are both parts suitable for automotive applications?

A: The TE Connectivity part lists automotive applications in its specification. The Samtec part does not specify automotive use. If automotive qualification is required, the TE Connectivity 5-104186-5 is the appropriate choice.

Q: What is the difference between LCP and Thermoplastic insulation materials?

A: Liquid Crystal Polymer (LCP) offers superior dimensional stability, lower moisture absorption, and better thermal performance compared to standard thermoplastic. For applications requiring tight tolerances or exposure to elevated temperatures near the 105°C maximum, LCP provides better long-term reliability.

Q: Are both parts available in the same packaging?

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

Q: What compliance certifications apply to both parts?

A: Both parts are RoHS3 compliant and carry UL94 V-0 flammability ratings. Both have MSL 1 (Unlimited) moisture sensitivity levels, indicating no special storage or handling requirements.