977-009-020-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 977-009-020-121 is a 9-position two-piece backshell connector manufactured by NorComp Inc., designed for D-Sub and HD15 position applications with 180° cable exit and shielded configuration. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system support and procurement planning. The substitute part maintains identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Substiute Parts

977-009-020-121

NorComp Inc.In Stock: 1083977-009-020-121 Datasheet

Current PartRFQ

977-009-020R121

NorComp Inc.In Stock: 22170977-009-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 977-009-020R121 is classified as a direct equivalent based on the following critical parameters that determine substitution validity:

• Number of Positions: 9 (identical)
• Compatible Shell Size: E (identical)
• Compatible D-Sub Size: 9pos and HD15pos (identical)
• Cable Exit Angle: 180° (identical)
• Shielding Configuration: Shielded (identical)
• Accessory Type: Two Piece Backshell (identical)
• Cable Type: Round (identical)
• Primary Material: Plastic, Metallized (identical)
• Plating Specification: Nickel over Copper (identical)
• Hardware Configuration: Assembly Hardware, Strain Relief (identical)
• Mating Features: Mating Screws 4-40 (identical)
• Color: Silver (identical)

The substitute maintains full electrical and mechanical compatibility with the original part while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 977-009-020R121 is the direct substitute for the obsolete 977-009-020-121. Selection of the substitute part is based on:

• Identical electrical and mechanical specifications across all critical parameters
• Active product status ensuring ongoing availability and supply chain continuity
• ROHS3 compliance certification, addressing regulatory requirements not met by the original part
• Moisture Sensitivity Level 1 (Unlimited) designation, providing superior handling flexibility
• Bulk packaging availability supporting production and inventory requirements

The substitute part provides equivalent functional performance with enhanced compliance and availability characteristics.

Frequently Asked Questions (FAQ)

Q: Are the 977-009-020-121 and 977-009-020R121 mechanically interchangeable?

A: Yes. Both parts share identical specifications for shell size (E), position count (9), cable exit angle (180°), shielding configuration, material composition, plating, and hardware features. Direct mechanical substitution is supported.

Q: What is the primary difference between these two parts?

A: The substitute part 977-009-020R121 is active in production status, whereas the original 977-009-020-121 is obsolete. Additionally, the substitute meets ROHS3 compliance requirements and carries a Moisture Sensitivity Level 1 (Unlimited) rating.

Q: Can the 977-009-020R121 be used in applications originally designed for the 977-009-020-121?

A: Yes. The substitute maintains full compatibility with 9-position and HD15-position D-Sub connectors, supporting identical cable configurations and assembly requirements.

Q: What packaging options are available for the substitute part?

A: The 977-009-020R121 is supplied in bulk packaging, suitable for production and assembly operations.

Q: Are there any compliance differences between the original and substitute parts?

A: The substitute part 977-009-020R121 is ROHS3 compliant, whereas the original 977-009-020-121 is RoHS non-compliant. Both parts maintain REACH Unaffected and EAR99 ECCN classifications.