973-050-020-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 973-050-020-121 is a 50-position two-piece D-Sub backshell connector manufactured by NorComp Inc. This shielded connector features a 180° cable exit angle and is designed for round cable applications with assembly hardware and strain relief. The part is currently listed as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs requiring compatible components.

Substiute Parts

973-050-020-121

NorComp Inc.In Stock: 1119973-050-020-121 Datasheet

Current PartRFQ

973-050-020R121

NorComp Inc.In Stock: 907973-050-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 973-050-020-121 is determined by strict equivalence across the following critical parameters:

• Number of Positions: 50
• Compatible Shell Size: D
• Compatible D-Sub Size: 50pos and HD78pos
• Cable Exit Angle: 180°
• Shielding: Shielded
• Cable Type: Round
• Accessory Type: Two Piece Backshell
• Plating: Nickel over Copper
• Hardware: Assembly Hardware, Strain Relief
• Mating Screws: 4-40

The substitute part 973-050-020R121 maintains identical electrical and mechanical specifications across all these parameters, ensuring direct functional compatibility in applications currently using the obsolete 973-050-020-121.

Parameter Comparison

Engineering Selection Recommendations

The 973-050-020R121 is the direct substitute for the obsolete 973-050-020-121. Both parts are manufactured by NorComp Inc. and share identical electrical and mechanical specifications. The primary distinction is product status: the 973-050-020R121 is currently active and available in bulk packaging, whereas the 973-050-020-121 is obsolete.

An additional consideration is regulatory compliance. The 973-050-020R121 is ROHS3 compliant, while the 973-050-020-121 is RoHS non-compliant. For applications subject to RoHS requirements, the 973-050-020R121 provides compliance alignment with current environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can the 973-050-020R121 directly replace the 973-050-020-121 in existing designs?

A: Yes. Both parts are identical in electrical and mechanical specifications, including position count, shell size, cable exit angle, shielding, plating, and hardware configuration. Direct substitution is supported without design modification.

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

A: The 973-050-020R121 is the active production variant of the same backshell design. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 compliant vs. non-compliant). Functional specifications are identical.

Q: Are there packaging differences between these parts?

A: The 973-050-020-121 packaging is not specified in available documentation. The 973-050-020R121 is supplied in bulk packaging. Confirm packaging requirements with your procurement process.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS compliance is a regulatory and environmental attribute, not a functional or mechanical characteristic. Both parts perform identically in circuit applications. Select based on your application's regulatory requirements.

Q: Can this backshell be used with D-Sub connectors other than 50-position?

A: No. This backshell is specifically designed for 50-position D-Sub connectors and HD78-position connectors. It is not compatible with other position counts or shell sizes.