NorComp 993-009-020-121 D-Sub Backshell Connector: Equivalent & Substitute Parts

Part Overview

The NorComp 993-009-020-121 is a 9-position two-piece D-Sub backshell connector with 45° cable exit and shielding. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance and new design implementations. The connector accommodates both 9-position and HD15-position D-Sub shells, supporting round cable configurations with integrated strain relief and assembly hardware.

Substiute Parts

993-009-020-121

NorComp Inc.In Stock: 823993-009-020-121 Datasheet

Current PartRFQ

993-009-020R121

NorComp Inc.In Stock: 8359993-009-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NorComp 993-009-020-121 is determined by strict equivalence across the following critical parameters:

• Number of Positions: 9
• Compatible Shell Size: E
• Compatible D-Sub Size: 9pos and HD15pos
• Cable Exit Angle: 45°
• Shielding: Shielded
• Cable Type: Round
• Accessory Type: Two Piece Backshell
• Mating Screws: 4-40
• Color: Silver

The substitute part 993-009-020R121 maintains identical specifications across all functional and mechanical parameters. Variations in plating material (Chrome versus Nickel over Copper), packaging format (loose versus bulk), and product status (Obsolete versus Active) do not affect electrical or mechanical compatibility for connector backshell applications.

Parameter Comparison

Engineering Selection Recommendations

The NorComp 993-009-020R121 serves as a direct functional equivalent to the obsolete 993-009-020-121. Both parts maintain identical mechanical and electrical compatibility for D-Sub backshell applications requiring 9-position, 45° shielded configurations.

The substitute part 993-009-020R121 offers the advantage of active product status, ensuring continued availability and supply chain reliability. Additionally, this substitute achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. For applications subject to environmental or regulatory requirements, the substitute part satisfies modern compliance standards.

The plating difference (Chrome versus Nickel over Copper) does not affect connector performance in standard operating environments. Both plating systems provide equivalent corrosion resistance and electrical conductivity for backshell applications.

Frequently Asked Questions (FAQ)

Q: Can the 993-009-020R121 directly replace the 993-009-020-121 in existing assemblies?

A: Yes. Both parts are mechanically and electrically identical across all functional parameters. The 993-009-020R121 maintains the same 9-position configuration, 45° cable exit, shell size E compatibility, and shielding characteristics.

Q: What is the significance of the plating difference between Chrome and Nickel over Copper?

A: Both plating systems provide adequate corrosion resistance and electrical conductivity for D-Sub backshell applications. The plating difference does not affect connector performance or compatibility. Selection between the two may depend on specific environmental exposure requirements or internal design specifications.

Q: Why is the original part marked as obsolete?

A: Product obsolescence typically reflects manufacturer discontinuation decisions. The substitute part 993-009-020R121 remains in active production, providing a viable path for continued component sourcing.

Q: Does the RoHS3 compliance of the substitute part affect compatibility?

A: No. RoHS3 compliance indicates adherence to environmental standards and does not alter the mechanical or electrical characteristics of the backshell connector. Systems designed for the original part will function identically with the RoHS3-compliant substitute.

Q: Are there packaging differences between the two parts?

A: The original part 993-009-020-121 is supplied in standard packaging, while the substitute 993-009-020R121 is supplied in bulk packaging. Packaging format does not affect component functionality or compatibility.

Q: What parameters must remain constant for a part to qualify as a substitute?

A: For D-Sub backshell connectors, the following parameters must match: number of positions, compatible shell size, compatible D-Sub size, cable exit angle, shielding configuration, cable type, accessory type, and mating screw specification. Variations in plating, packaging, or product status do not compromise substitution validity.