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

Part Overview

The TMS-108-03-S-S-RA is a .050" (1.27mm) micro header connector manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board applications. This 8-position, single-row unshrouded header features male pins with solder termination and push-pull fastening. The connector is actively produced and widely used in applications requiring compact, reliable interconnection with a 5A per contact current rating. Substitute parts are identified when equivalent electrical and mechanical parameters align with the core specifications, enabling direct replacement in compatible designs.

Substiute Parts

TMS-108-03-S-S-RA

Samtec Inc.In Stock: 834TMS-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 TMS-108-03-S-S-RA is determined by strict alignment of the following critical parameters:

• Pitch - Mating: 0.050" (1.27mm) — must match exactly for mechanical compatibility
• Number of Positions: 8 — connector must accommodate identical pin count
• Number of Rows: 1 — single-row configuration required
• Connector Type: Header — must be header-type connector
• Contact Type: Male Pin — male pin contact required
• Mounting Type: Through Hole, Right Angle — right-angle orientation mandatory
• Termination: Solder — solder termination required
• Fastening Type: Push-Pull — push-pull mechanism required
• Contact Finish - Mating: Gold — gold plating on mating surface required
• RoHS Status: ROHS3 Compliant — regulatory compliance required

The substitute part 5-104186-5 (TE Connectivity AMP Connectors) meets all critical substitution criteria across these parameters, enabling direct functional replacement in applications designed for the TMS-108-03-S-S-RA.

Parameter Comparison

Engineering Selection Recommendations

Both the TMS-108-03-S-S-RA and 5-104186-5 are active products with ROHS3 compliance and UL94 V-0 flammability ratings, meeting current regulatory requirements. The connectors share identical mating pitch, position count, row configuration, contact type, mounting orientation, termination method, and fastening mechanism. Both feature gold-plated mating surfaces with equivalent finish thickness and unlimited moisture sensitivity rating.

Differences exist in contact post length (0.140" vs. 0.100"), insulation height (0.098" vs. 0.116"), contact shape (square vs. circular), contact material (phosphor bronze vs. copper alloy), insulation material (LCP vs. thermoplastic), and operating temperature ranges. The TMS-108-03-S-S-RA supports -55°C to 125°C operation with 5A per contact current rating. The 5-104186-5 operates from -65°C to 105°C with 30VAC voltage rating specified.

Selection between these parts depends on specific application requirements regarding temperature extremes, contact post length clearance, insulation material compatibility, and electrical load specifications. Both parts are suitable for board-to-board interconnection in push-pull fastened applications.

Frequently Asked Questions (FAQ)

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

A: Direct mechanical and electrical substitution is possible due to matching mating pitch (0.050"), position count (8), row configuration (1), contact type (male pin), mounting type (through hole, right angle), termination (solder), and fastening type (push-pull). However, differences in contact post length and insulation height may affect PCB layout compatibility. Verify clearance and spacing requirements before implementation.

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

A: The primary differences are contact post length (TMS-108-03-S-S-RA: 0.140" vs. 5-104186-5: 0.100"), insulation height (0.098" vs. 0.116"), contact shape (square vs. circular), contact material (phosphor bronze vs. copper alloy), insulation material (LCP vs. thermoplastic), and operating temperature range (-55°C to 125°C vs. -65°C to 105°C).

Q: Are both connectors RoHS compliant?

A: Yes, both the TMS-108-03-S-S-RA and 5-104186-5 are ROHS3 compliant and carry UL94 V-0 flammability ratings.

Q: What is the current rating for each connector?

A: The TMS-108-03-S-S-RA is rated for 5A per contact. The current rating for the 5-104186-5 is not specified in the provided data; however, a 30VAC voltage rating is documented.

Q: Do these connectors have different moisture sensitivity levels?

A: No, both connectors have MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture handling requirements during storage or assembly.

Q: Which connector should I select for high-temperature applications?

A: The TMS-108-03-S-S-RA supports operation up to 125°C, while the 5-104186-5 is rated to 105°C. For applications requiring sustained operation above 105°C, the TMS-108-03-S-S-RA is the appropriate choice.