979-050-020-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 979-050-020-121 is a 50-position two-piece D-Sub backshell connector manufactured by NorComp Inc. with 180° shielded cable exit. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The part features a shielded design with round cable compatibility and chrome plating suitable for industrial D-Sub connector applications.

Substiute Parts

979-050-020-121

NorComp Inc.In Stock: 826979-050-020-121 Datasheet

Current PartRFQ

979-050-020R121

NorComp Inc.In Stock: 970979-050-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 979-050-020-121 is based on strict equivalence across the following critical parameters:

• Number of Positions: 50 (exact match required)
• Compatible Shell Size: D (exact match required)
• Compatible D-Sub Size: 50pos and HD78pos (exact match required)
• Cable Exit Angle: 180° (exact match required)
• Shielding Configuration: Shielded (exact match required)
• Cable Type: Round (exact match required)
• Material Composition: Plastic, Metallized (exact match required)
• Plating Specification: Chrome (exact match required)
• Hardware Configuration: Assembly Hardware, Grommets, Mating Screws 4-40 (exact match required)

The substitute part 979-050-020R121 meets all these criteria and is manufactured by the same supplier, ensuring mechanical and electrical compatibility with existing designs.

Parameter Comparison

Engineering Selection Recommendations

The 979-050-020R121 is the direct substitute for the obsolete 979-050-020-121. Both parts are manufactured by NorComp Inc. and share identical mechanical and electrical specifications across all critical parameters.

The primary distinction between these parts is product status and regulatory compliance. The 979-050-020R121 maintains active product status and achieves ROHS3 compliance, whereas the 979-050-020-121 is obsolete and RoHS non-compliant. For new designs and ongoing procurement, the 979-050-020R121 is the appropriate selection.

Both parts carry identical REACH Unaffected and EAR99 ECCN classifications, confirming equivalent regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can the 979-050-020R121 be used as a direct replacement for the 979-050-020-121?

A: Yes. Both parts are identical in mechanical configuration, electrical specifications, and physical dimensions. The 979-050-020R121 is the active production equivalent.

Q: What is the difference between these two part numbers?

A: The 979-050-020-121 is obsolete and RoHS non-compliant. The 979-050-020R121 is the current production part with ROHS3 compliance and active product status.

Q: Are there packaging differences between these parts?

A: The 979-050-020R121 is supplied in bulk packaging. Packaging specifications for the 979-050-020-121 were not provided.

Q: Will the 979-050-020R121 work with existing 50-position D-Sub connector assemblies?

A: Yes. The 979-050-020R121 maintains full compatibility with 50-position and HD78-position D-Sub connectors due to identical shell size, cable exit angle, and shielding configuration.

Q: Are there any compliance considerations when switching to the 979-050-020R121?

A: The 979-050-020R121 achieves ROHS3 compliance, which may be required for new designs or systems subject to RoHS regulations. Both parts maintain identical REACH and ECCN classifications.