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

Part Overview

The HTMS-108-03-G-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. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative sourcing is required.

Substiute Parts

HTMS-108-03-G-S-RA

Samtec Inc.In Stock: 1000HTMS-108-03-G-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-G-S-RA is determined by strict alignment of the following critical parameters:

Connector pitch must be 0.050" (1.27mm) to ensure mechanical and electrical compatibility with mating connectors and PCB layouts. The number of positions must be 8 with a single row configuration. The mounting type must be through-hole, right-angle to match board-level integration requirements. Contact type must be male pin with solder termination. The contact length at mating interface must be 0.125" (3.18mm). Shrouding must be unshrouded to maintain form factor consistency. Contact finish at the mating interface must be gold to ensure reliable signal transmission and corrosion resistance.

The substitute part 5-104186-5 (TE Connectivity AMP Connectors) meets these core substitution criteria. Both parts share identical pitch, position count, row configuration, mounting type, termination method, mating contact length, shrouding style, and mating contact finish. Both are RoHS3 compliant and carry UL94 V-0 flammability ratings, confirming regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-108-03-G-S-RA and 5-104186-5 are active production parts with RoHS3 compliance and UL94 V-0 flammability certification, confirming suitability for regulated applications. The parts share identical critical mechanical and electrical parameters: 0.050" pitch, 8-position single-row configuration, through-hole right-angle mounting, solder termination, and 0.125" mating contact length.

Differences exist in secondary parameters. The HTMS-108-03-G-S-RA specifies a 5A per contact current rating, while the 5-104186-5 does not provide this specification. The HTMS-108-03-G-S-RA operates across -55°C to 125°C, whereas the 5-104186-5 operates across -65°C to 105°C. The HTMS-108-03-G-S-RA uses Liquid Crystal Polymer insulation with square contacts, while the 5-104186-5 uses thermoplastic insulation with circular contacts. Post contact length and finish differ between the two parts.

Selection between these parts depends on application-specific requirements. If the design requires operation above 105°C or below -65°C, the HTMS-108-03-G-S-RA is required. If the application specifies a 5A per contact current requirement, the HTMS-108-03-G-S-RA is the appropriate choice. For general-purpose applications within the overlapping temperature range of -55°C to 105°C without explicit current specifications, either part is functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 5-104186-5 be used as a direct replacement for the HTMS-108-03-G-S-RA in all applications?

A: The 5-104186-5 is mechanically and electrically compatible for applications operating within the overlapping temperature range of -55°C to 105°C. However, if your application requires operation above 105°C or specifies a 5A per contact current rating, the HTMS-108-03-G-S-RA is the required part. Verify your design specifications before substitution.

Q: What are the key differences between these two connectors?

A: The primary differences are: operating temperature range (HTMS-108-03-G-S-RA: -55°C to 125°C vs. 5-104186-5: -65°C to 105°C), current rating specification (HTMS-108-03-G-S-RA: 5A per contact vs. 5-104186-5: not specified), insulation material (HTMS-108-03-G-S-RA: LCP vs. 5-104186-5: thermoplastic), contact shape (HTMS-108-03-G-S-RA: square vs. 5-104186-5: circular), and post contact length (HTMS-108-03-G-S-RA: 0.140" vs. 5-104186-5: 0.100").

Q: Are both parts RoHS3 compliant?

A: Yes, both the HTMS-108-03-G-S-RA and 5-104186-5 are RoHS3 compliant and carry UL94 V-0 flammability ratings, confirming regulatory alignment for restricted substance and fire safety requirements.

Q: What is the pitch specification for these connectors?

A: Both connectors operate at 0.050" (1.27mm) pitch, which is the standard spacing between contact positions. This pitch is critical for PCB layout compatibility and mating connector selection.

Q: Do these connectors have the same number of positions?

A: Yes, both connectors are 8-position, single-row configurations. The mating contact length is identical at 0.125" (3.18mm) for both parts.

Q: What is the moisture sensitivity level for these parts?

A: Both the HTMS-108-03-G-S-RA and 5-104186-5 carry a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without special moisture control requirements.