RSM-140-02-S-D Equivalent & Substitute Parts

Part Overview

The RSM-140-02-S-D is an 80-position receptacle connector manufactured by Samtec Inc., designed for board-to-board applications with 0.050" (1.27mm) pitch surface mount termination. This connector features gold-plated mating contacts and is classified as Active product status. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit functional equivalents.

Substiute Parts

RSM-140-02-S-D

Samtec Inc.In Stock: 1171RSM-140-02-S-D Datasheet

Current PartRFQ

104550-8

TE Connectivity AMP ConnectorsIn Stock: 1210104550-8 Datasheet

SimilarRFQ

5-104550-8

TE Connectivity AMP ConnectorsIn Stock: 11255-104550-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSM-140-02-S-D are identified based on strict electrical and mechanical parameter alignment. The following parameters determine substitution eligibility:

• Connector Type: Receptacle
• Number of Positions: 80
• Pitch - Mating: 0.050" (1.27mm)
• Number of Rows: 2
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Surface Mount
• Fastening Type: Push-Pull
• Contact Finish - Mating: Gold
• Contact Finish Thickness - Mating: 30.0µin (0.76µm)
• Insulation Color: Black
• Material Flammability Rating: UL94 V-0
• Termination: Solder

The substitute parts 104550-8 and 5-104550-8 (TE Connectivity AMP Connectors, AMPMODU System 50 series) meet these core mechanical and electrical criteria, enabling functional equivalence in board-to-board connector applications.

Parameter Comparison

Engineering Selection Recommendations

Both TE Connectivity substitute parts (104550-8 and 5-104550-8) are functionally equivalent to the RSM-140-02-S-D for board-to-board connector applications based on matching core electrical and mechanical parameters.

5-104550-8 (TE Connectivity) is the preferred substitute when RoHS3 compliance is required, as it maintains ROHS3 Compliant status matching the primary part. This part is suitable for applications requiring regulatory compliance with modern environmental standards.

104550-8 (TE Connectivity) is available as an alternative when RoHS compliance is not a design requirement. This part carries RoHS non-compliant status and should be selected only for applications where such compliance is not mandated.

Design considerations include insulation height differences: the RSM-140-02-S-D features 0.240" (6.10mm) insulation height, while both TE Connectivity substitutes provide 0.370" (9.40mm) insulation height. Operating temperature ranges differ: the primary part operates -55°C ~ 125°C, while substitutes operate -65°C ~ 105°C. Insulation material differs between LCP (primary part) and PPA (substitute parts). All three parts maintain identical contact pitch, row spacing, fastening type, and mating contact finish specifications.

Frequently Asked Questions (FAQ)

Q: Can 104550-8 and 5-104550-8 be used interchangeably with RSM-140-02-S-D?

A: Both TE Connectivity parts meet the core mechanical and electrical substitution criteria. However, design validation is necessary to confirm compatibility with specific application requirements, particularly regarding insulation height, operating temperature range, and insulation material differences.

Q: What is the primary difference between 104550-8 and 5-104550-8?

A: The primary difference is RoHS compliance status. The 5-104550-8 is ROHS3 Compliant, while the 104550-8 is RoHS non-compliant. Both parts are otherwise electrically and mechanically equivalent.

Q: Does the insulation height difference affect board-to-board mating?

A: The RSM-140-02-S-D has 0.240" (6.10mm) insulation height, while both TE Connectivity substitutes have 0.370" (9.40mm) insulation height. This difference may affect PCB layout and mating connector clearance. Design verification is required for specific applications.

Q: Are the operating temperature ranges compatible?

A: The RSM-140-02-S-D operates -55°C ~ 125°C, while substitute parts operate -65°C ~ 105°C. Applications requiring the full upper temperature range of the primary part cannot use the substitutes without thermal analysis.

Q: What insulation materials are used in each part?

A: The RSM-140-02-S-D uses Liquid Crystal Polymer (LCP), while both TE Connectivity substitutes use Polyphthalamide (PPA). Material selection may impact mechanical properties and environmental resistance in specific applications.

Q: Are all three parts rated for the same current per contact?

A: The RSM-140-02-S-D is rated 3.1A per contact. Current rating data for the TE Connectivity substitutes is not provided in the specification parameters.