HTMS-120-03-G-S-RA Equivalent & Substitute Parts

Part Overview

The HTMS-120-03-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 part is currently active in production with 971 units in stock. Equivalent parts are identified when design requirements allow substitution based on matching electrical and mechanical parameters within acceptable tolerances for the intended application.

Substiute Parts

HTMS-120-03-G-S-RA

Samtec Inc.In Stock: 1064HTMS-120-03-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 of the HTMS-120-03-G-S-RA is permissible when the alternative part meets the following critical parameters:

• Connector type: Header
• Contact type: Male Pin
• Pitch - Mating: 0.050" (1.27mm)
• Number of positions: 20
• Number of rows: 1
• Mounting type: Through Hole, Right Angle
• Termination: Solder
• Shrouding: Unshrouded
• Contact finish - Mating: Gold
• Material Flammability Rating: UL94 V-0
• RoHS compliance status: RoHS Compliant or ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The TE Connectivity AMP Connectors part number 6-104186-1 satisfies all critical substitution criteria. Variations in insulation material (Thermoplastic vs. Liquid Crystal Polymer), contact shape (Circular vs. Square), and contact finish thickness are within acceptable engineering tolerances for board-to-board header applications where mechanical fit and electrical continuity are the primary functional requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the HTMS-120-03-G-S-RA and 6-104186-1 are active production parts with UL94 V-0 flammability ratings and RoHS compliance. Selection between these parts should be based on the following factors:

The HTMS-120-03-G-S-RA offers a higher operating temperature maximum of 125°C compared to the 6-104186-1 at 105°C. The HTMS part specifies a 5A per contact current rating, while the TE Connectivity part specifies 30VAC voltage rating. The HTMS-120-03-G-S-RA uses Liquid Crystal Polymer insulation with square contacts, whereas the 6-104186-1 uses Thermoplastic insulation with circular contacts. Both parts feature gold-plated mating contacts and identical 0.050" (1.27mm) pitch with 20 positions in a single row.

The 6-104186-1 has higher inventory availability at 3416 units compared to 971 units for the HTMS-120-03-G-S-RA. Both parts are classified under the same HTSUS code and ECCN designation.

Frequently Asked Questions (FAQ)

Q: Can the 6-104186-1 be used as a direct replacement for the HTMS-120-03-G-S-RA?

A: Yes, the 6-104186-1 meets all critical substitution parameters: identical pitch (0.050"), position count (20), row configuration (1), mounting type (through-hole right-angle), termination method (solder), and contact finish (gold-plated). Both parts are unshrouded headers with UL94 V-0 flammability ratings and MSL 1 moisture sensitivity levels.

Q: What are the differences in contact post length between these parts?

A: The HTMS-120-03-G-S-RA has a contact post length of 0.140" (4.66mm), while the 6-104186-1 has 0.100" (2.54mm). This difference may affect PCB design and mating depth considerations. Verify that your application accommodates the shorter post length of the TE Connectivity part.

Q: Are there temperature range differences that affect substitution?

A: The HTMS-120-03-G-S-RA operates from -55°C to 125°C, while the 6-104186-1 operates from -65°C to 105°C. The Samtec part supports higher maximum temperature operation. For applications requiring sustained operation above 105°C, the HTMS-120-03-G-S-RA is the appropriate selection.

Q: What is the difference in insulation material between these connectors?

A: The HTMS-120-03-G-S-RA uses Liquid Crystal Polymer (LCP) insulation, while the 6-104186-1 uses Thermoplastic insulation. Both materials meet UL94 V-0 flammability requirements. LCP provides superior dimensional stability and chemical resistance, while Thermoplastic offers standard performance for general-purpose applications.

Q: Do both parts have the same contact shape?

A: No. The HTMS-120-03-G-S-RA features square contacts, while the 6-104186-1 features circular contacts. Both contact shapes are compatible with standard 0.050" pitch mating receptacles. Contact shape does not affect electrical performance in standard board-to-board applications.

Q: Which part should be selected for new designs?

A: Selection depends on application requirements. For high-temperature applications exceeding 105°C, specify the HTMS-120-03-G-S-RA. For general-purpose applications with standard temperature ranges, either part is acceptable. Consider inventory availability and lead time in procurement decisions.