HTMS-120-02-G-S-RA Equivalent & Substitute Parts

Part Overview

The HTMS-120-02-G-S-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board applications. This unshrouded header features 20 positions at 0.050" (1.27mm) pitch with male pin contacts and solder termination. The connector is actively produced and stocked with 817 units available. Finding equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate alternative sourcing strategies when the primary part becomes unavailable or when design requirements necessitate alternative connector options.

Substiute Parts

HTMS-120-02-G-S-RA

Samtec Inc.In Stock: 844HTMS-120-02-G-S-RA Datasheet

Current PartRFQ

6-104186-1

TE Connectivity AMP ConnectorsIn Stock: 34466-104186-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HTMS-120-02-G-S-RA is determined by the following critical parameters:

• Pitch - Mating: 0.050" (1.27mm) — must match exactly for PCB footprint compatibility
• Number of Positions: 20 — must match for circuit connectivity
• Number of Rows: 1 — must match for physical layout
• Connector Type: Header — must be header type for board-to-board application
• Contact Type: Male Pin — must be male pin for mating with female receptacles
• Mounting Type: Through Hole, Right Angle — must match for PCB assembly orientation
• Termination: Solder — must be solder termination for permanent board attachment
• Fastening Type: Push-Pull — must match for mechanical engagement

The substitute part 6-104186-1 (TE Connectivity AMP Connectors) satisfies all critical substitution parameters. Both connectors share identical pitch, position count, row configuration, connector type, contact type, mounting method, termination style, and fastening mechanism. These parameters ensure mechanical and electrical interchangeability at the PCB level.

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-120-02-G-S-RA and 6-104186-1 are active products with established manufacturing and supply chains. Selection between these parts should be based on the following factors:

HTMS-120-02-G-S-RA (Samtec) is suitable when:

• Operating temperature range of -55°C to 125°C is required
• Current rating of 5A per contact is specified in the design
• Liquid Crystal Polymer (LCP) insulation material is preferred for mechanical stability
• Square contact geometry is required for specific mating interface requirements
• Higher contact finish thickness on mating surfaces (10.0µin) is acceptable

6-104186-1 (TE Connectivity) is suitable when:

• Operating temperature range of -65°C to 105°C is acceptable
• Voltage rating of 30VAC is specified in the design
• Thermoplastic insulation material is acceptable
• Circular contact geometry is compatible with the mating receptacle
• Higher contact finish thickness on mating surfaces (30.0µin) provides enhanced durability

Both connectors comply with UL94 V-0 flammability standards and RoHS regulations, ensuring compliance with environmental and safety requirements. Current inventory levels (817 units for HTMS-120-02-G-S-RA and 3416 units for 6-104186-1) support production scheduling and supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can the HTMS-120-02-G-S-RA be directly replaced with the 6-104186-1 on an existing PCB?

A: Direct replacement is possible from a mechanical and electrical connectivity standpoint. Both connectors share identical pitch (0.050"), position count (20), row configuration (1), mounting type (through-hole right-angle), and termination method (solder). However, physical dimensions differ: the 6-104186-1 has a larger insulation height (0.116" vs. 0.096") and different contact lengths. Verify that the PCB layout and mating receptacle accommodate these dimensional variations before implementation.

Q: What are the key differences in contact geometry between these two parts?

A: The HTMS-120-02-G-S-RA features square contacts, while the 6-104186-1 uses circular contacts. Contact shape affects mating force, contact resistance, and compatibility with specific receptacle designs. Ensure the mating connector is compatible with the substitute part's contact geometry.

Q: Are there temperature or current rating limitations when substituting?

A: The HTMS-120-02-G-S-RA specifies a 5A per contact current rating and operates from -55°C to 125°C. The 6-104186-1 does not specify a current rating but operates from -65°C to 105°C. If your application requires the full -55°C to 125°C range or 5A per contact current, verify that the 6-104186-1 meets these requirements through TE Connectivity technical documentation before substitution.

Q: Do both connectors meet RoHS compliance requirements?

A: Yes. The HTMS-120-02-G-S-RA is ROHS3 compliant, and the 6-104186-1 is RoHS compliant. Both connectors satisfy RoHS regulatory requirements for restricted substance elimination.

Q: What is the impact of different insulation materials on connector performance?

A: The HTMS-120-02-G-S-RA uses Liquid Crystal Polymer (LCP) insulation, while the 6-104186-1 uses thermoplastic insulation. LCP provides superior mechanical stability and dimensional consistency at elevated temperatures. Thermoplastic offers adequate performance for general applications. Material selection should align with your application's thermal and mechanical requirements.

Q: How do contact finish thickness differences affect connector reliability?

A: The HTMS-120-02-G-S-RA has 10.0µin (0.25µm) gold plating on mating contacts, while the 6-104186-1 has 30.0µin (0.76µm). Thicker gold plating on the 6-104186-1 provides enhanced corrosion resistance and extended contact life in high-cycle mating applications. For static or low-cycle applications, both finishes are adequate.