973-037-020-121 Equivalent & Substitute Parts

Part Overview

The 973-037-020-121 is a 37 Position Two Piece Backshell Connector with 180° cable exit, manufactured by NorComp Inc. This shielded D-Sub accessory is designed for round cable applications with nickel over copper plating and integrated strain relief. The part is currently classified as obsolete, making identification of active equivalent components essential for ongoing system support and procurement planning.

Substiute Parts

973-037-020-121

NorComp Inc.In Stock: 1068973-037-020-121 Datasheet

Current PartRFQ

973-037-020R121

NorComp Inc.In Stock: 880973-037-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 973-037-020-121 is determined by strict equivalence across the following critical parameters:

• Number of Positions: 37
• Compatible Shell Size: C
• Compatible D-Sub Size: 37pos and HD62pos
• Cable Exit Angle: 180°
• Shielding: Shielded
• Cable Type: Round
• Plating: Nickel over Copper
• Hardware Configuration: Assembly Hardware, Strain Relief
• Mating Feature: Mating Screws 4-40
• Color: Silver

The substitute part 973-037-020R121 maintains complete electrical and mechanical equivalence across all specified parameters. The primary distinction is product status: the substitute transitions from obsolete to active classification, with corresponding RoHS3 compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The 973-037-020R121 is the direct active equivalent for the obsolete 973-037-020-121. Selection of the substitute part is supported by:

• Complete mechanical and electrical parameter equivalence across all connector specifications
• Active product status ensuring ongoing availability and supply chain continuity
• ROHS3 compliance certification, addressing regulatory requirements for new designs and procurement cycles
• Identical REACH and ECCN classifications, maintaining export and regulatory consistency
• Maintained manufacturer support through NorComp Inc.

For applications requiring RoHS non-compliant components, the original 973-037-020-121 remains the specified part. For new designs, system upgrades, or procurement requiring current product status and regulatory compliance, the 973-037-020R121 is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between 973-037-020-121 and 973-037-020R121?

A: Both parts are mechanically and electrically identical 37-position D-Sub backshells with 180° cable exit and shielding. The primary difference is product status: 973-037-020-121 is obsolete, while 973-037-020R121 is active. Additionally, 973-037-020R121 carries ROHS3 compliance certification.

Q: Can 973-037-020R121 be used as a direct replacement in existing assemblies?

A: Yes. The substitute part maintains complete equivalence across all electrical and mechanical parameters, including connector position count, shell size compatibility, cable exit angle, shielding configuration, plating specification, and hardware features.

Q: Are there packaging differences between these parts?

A: The main part 973-037-020-121 has unspecified packaging, while 973-037-020R121 is supplied in bulk packaging. Packaging format does not affect connector functionality or compatibility.

Q: Does the RoHS3 compliance of 973-037-020R121 affect compatibility?

A: No. RoHS3 compliance is a material composition and manufacturing standard that does not alter electrical or mechanical performance. The substitute part maintains full compatibility with existing connector interfaces and cable assemblies.

Q: Are both parts suitable for shielded applications?

A: Yes. Both the 973-037-020-121 and 973-037-020R121 are shielded backshells with nickel over copper plating, providing equivalent electromagnetic shielding performance for round cable applications.