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

Part Overview

The HTMS-120-02-G-S is a rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board applications. This unshrouded, 20-position connector operates at 0.050" (1.27mm) pitch and supports 5A per contact with a temperature range of -55°C to 125°C. The part is currently active in production and RoHS3 compliant, making it suitable for industrial and commercial applications requiring reliable vertical header connectivity.

Equivalent parts are identified when they maintain critical electrical and mechanical parameters within acceptable tolerances for the intended application, ensuring functional interchangeability without redesign.

Substiute Parts

HTMS-120-02-G-S

Samtec Inc.In Stock: 959HTMS-120-02-G-S Datasheet

Current PartRFQ

6-104178-1

TE Connectivity AMP ConnectorsIn Stock: 29166-104178-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 6-104178-1 (TE Connectivity AMP Connectors) qualifies as an equivalent based on the following critical parameters:

Matching Parameters:

• Connector type: Header
• Contact type: Male Pin
• Number of positions: 20
• Pitch - mating: 0.050" (1.27mm)
• Number of rows: 1
• Mounting type: Through Hole
• Termination: Solder
• Fastening type: Push-Pull
• Overall contact length: 0.320" (8.13mm)
• Insulation height: 0.100" (2.54mm)
• Contact shape: Square
• Contact finish - mating: Gold
• Material flammability rating: UL94 V-0
• Moisture sensitivity level: 1 (Unlimited)
• Product status: Active

Acceptable Variations:

• Contact length - mating: 0.120" (3.05mm) vs. 0.100" (2.54mm) — within tolerance for mating interface
• Contact finish thickness - mating: 30.0µin (0.76µm) vs. 10.0µin (0.25µm) — both provide adequate gold plating
• Operating temperature: -65°C ~ 105°C vs. -55°C ~ 125°C — overlapping range covers standard industrial applications
• Insulation material: Thermoplastic vs. LCP — both meet UL94 V-0 flammability requirements
• Contact material: Copper Alloy vs. Phosphor Bronze — both suitable for electrical performance at rated current

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-120-02-G-S and 6-104178-1 are active production parts with equivalent functional performance for standard through-hole board-to-board applications. Selection between these parts should be based on:

Samtec HTMS-120-02-G-S:

• RoHS3 compliant
• Extended operating temperature range (-55°C ~ 125°C)
• Specified current rating of 5A per contact
• LCP insulation material

TE Connectivity 6-104178-1:

• RoHS compliant
• Specified voltage rating of 30VAC
• Thermoplastic insulation material
• Higher gold plating thickness on mating contacts (30.0µin vs. 10.0µin)

Both parts meet UL94 V-0 flammability requirements and carry MSL 1 moisture sensitivity ratings. The choice between them depends on application-specific requirements regarding temperature extremes, voltage specifications, and packaging availability.

Frequently Asked Questions (FAQ)

Q: Can 6-104178-1 be used as a direct replacement for HTMS-120-02-G-S?

A: Yes, for applications within the overlapping operating temperature range (-55°C ~ 105°C) and where the specified voltage rating of 30VAC is acceptable. Both connectors maintain identical pitch (0.050"), position count (20), contact shape (square), and overall contact length (0.320"), ensuring mechanical and electrical compatibility in board-to-board configurations.

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

A: The HTMS-120-02-G-S has a 0.100" mating contact length and 0.120" post length, while the 6-104178-1 reverses these dimensions (0.120" mating, 0.100" post). Both configurations result in the same overall contact length (0.320") and insulation height (0.100"), maintaining proper engagement depth and board clearance.

Q: Are there packaging differences between these parts?

A: Yes. The HTMS-120-02-G-S is supplied in tube packaging, while the 6-104178-1 is supplied in bulk packaging. This affects inventory management and handling procedures but does not impact electrical or mechanical performance.

Q: Does the difference in insulation material affect performance?

A: Both LCP (HTMS-120-02-G-S) and thermoplastic (6-104178-1) insulation materials meet UL94 V-0 flammability requirements. Material selection depends on application-specific environmental and thermal requirements within the specified operating temperature ranges.

Q: What is the impact of gold plating thickness variation?

A: The 6-104178-1 provides 30.0µin (0.76µm) gold plating on mating contacts compared to 10.0µin (0.25µm) on the HTMS-120-02-G-S. Both thicknesses provide adequate corrosion resistance and electrical conductivity for standard applications. Thicker plating may offer extended contact life in high-cycle mating environments.