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

Part Overview

The HTMS-108-03-S-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 125°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 direct replacement in compatible applications.

Substiute Parts

HTMS-108-03-S-S-RA

Samtec Inc.In Stock: 1156HTMS-108-03-S-S-RA Datasheet

Current PartRFQ

5-104186-5

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HTMS-108-03-S-S-RA is determined by strict alignment of the following critical parameters:

• Connector type: Header
• Contact type: Male pin
• Pitch: 0.050" (1.27mm)
• Number of positions: 8
• Number of rows: 1
• Mounting type: Through hole, right angle
• Termination: Solder
• Fastening type: Push-pull
• Contact finish (mating): Gold
• RoHS compliance: ROHS3

The substitute part 5-104186-5 (TE Connectivity AMP Connectors) meets these core electrical and mechanical criteria, enabling functional equivalence in board-to-board applications requiring identical pitch, position count, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-108-03-S-S-RA and 5-104186-5 are active production parts with ROHS3 compliance and UL94 V-0 flammability ratings. Selection between these parts depends on application-specific temperature and insulation material requirements.

The HTMS-108-03-S-S-RA operates across -55°C to 125°C with Liquid Crystal Polymer insulation, suitable for extended temperature range applications. The 5-104186-5 operates across -65°C to 105°C with thermoplastic insulation, providing lower temperature capability but narrower upper temperature range. Contact post length differs between parts (0.140" versus 0.100"), which may affect PCB layout and solder joint geometry.

Both parts maintain identical mating contact specifications, pitch, position count, and gold plating thickness, ensuring electrical compatibility in board-to-board interconnect applications.

Frequently Asked Questions (FAQ)

Q: Can 5-104186-5 directly replace HTMS-108-03-S-S-RA in all applications?

A: Direct replacement is possible when application temperature requirements fall within the 5-104186-5 operating range (-65°C to 105°C) and PCB layout accommodates the 0.100" contact post length. Verify thermal and mechanical constraints before substitution.

Q: What is the significance of the 0.050" (1.27mm) pitch specification?

A: Pitch defines the center-to-center spacing between adjacent contacts. Both parts maintain 0.050" pitch, ensuring mechanical and electrical compatibility with mating connectors designed for this standard spacing.

Q: How do insulation material differences affect performance?

A: Liquid Crystal Polymer (LCP) in the HTMS-108-03-S-S-RA provides superior thermal stability and dimensional consistency at elevated temperatures. Thermoplastic insulation in the 5-104186-5 offers adequate performance within its specified temperature range but may exhibit greater dimensional variation at temperature extremes.

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

A: The HTMS-108-03-S-S-RA is rated for 5A per contact. The 5-104186-5 does not specify a current rating in the provided data. Verify current requirements against the HTMS-108-03-S-S-RA specification or contact the manufacturer for 5-104186-5 current capacity.

Q: What does RoHS3 compliance indicate?

A: ROHS3 compliance confirms that both parts meet Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. Both parts are suitable for applications requiring RoHS compliance.

Q: How does MSL rating affect handling and storage?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage practices apply without special desiccant or humidity control requirements.