977-037-020-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 977-037-020-121 is a 37-position two-piece backshell connector manufactured by NorComp Inc., designed for D-Sub applications with 180° cable exit and shielded configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning. The part features nickel-plated copper contacts over plastic construction with integrated strain relief and assembly hardware.

Substiute Parts

977-037-020-121

NorComp Inc.In Stock: 1054977-037-020-121 Datasheet

Current PartRFQ

977-037-020R121

NorComp Inc.In Stock: 1133977-037-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 977-037-020-121 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 Configuration: Shielded
• Accessory Type: Two Piece Backshell
• Plating Specification: Nickel over Copper
• Hardware Configuration: Assembly Hardware, Strain Relief
• Mating Screw Size: 4-40

The substitute part 977-037-020R121 maintains identical electrical and mechanical specifications across all parameters listed above, ensuring direct functional compatibility in applications currently utilizing the obsolete 977-037-020-121.

Parameter Comparison

Engineering Selection Recommendations

The 977-037-020R121 is the direct functional equivalent for the obsolete 977-037-020-121. Both parts are manufactured by NorComp Inc. within the same 977 series and maintain identical mechanical and electrical specifications for D-Sub backshell applications.

The primary distinction between these parts is product status and regulatory compliance. The 977-037-020-121 is classified as obsolete and carries RoHS non-compliant status. The 977-037-020R121 is an active product with ROHS3 compliance certification, making it suitable for applications subject to RoHS3 regulatory requirements. Both parts maintain equivalent REACH and ECCN classifications.

For new designs or system upgrades, the 977-037-020R121 is the appropriate selection. For legacy system maintenance where RoHS compliance is not a requirement, either part satisfies the functional specification.

Frequently Asked Questions (FAQ)

Q: Can 977-037-020R121 be used as a direct replacement for 977-037-020-121?

A: Yes. Both parts are identical in electrical and mechanical specifications, including position count, shell size compatibility, cable exit angle, shielding configuration, plating, and hardware specifications. The substitute part is manufactured by the same supplier within the same product series.

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

A: The 977-037-020-121 is obsolete with RoHS non-compliant status. The 977-037-020R121 is an active product with ROHS3 compliance. All functional parameters remain equivalent.

Q: Are there packaging differences between these parts?

A: The 977-037-020-121 packaging specification is not provided. The 977-037-020R121 is supplied in bulk packaging.

Q: Do both parts support the same D-Sub connector sizes?

A: Yes. Both parts are compatible with 37-position and HD62-position D-Sub connectors with shell size C.

Q: What is the cable exit configuration for these backshells?

A: Both parts feature 180° cable exit angle, suitable for applications requiring straight-back cable routing relative to the connector mounting plane.

Q: Are these parts suitable for shielded applications?

A: Yes. Both parts include shielded configuration with nickel-plated copper contacts and metallized plastic construction for electromagnetic interference protection.