NorComp 983-025-020-121 D-Sub Backshell Connector: Equivalent & Substitute Parts

Part Overview

The NorComp 983-025-020-121 is a 25-position two-piece backshell connector with 180° cable exit, designed for D-Sub applications requiring shielded configurations. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and system maintenance. The substitute part maintains identical electrical and mechanical specifications while offering improved product status and compliance posture.

Substiute Parts

983-025-020-121

NorComp Inc.In Stock: 1048983-025-020-121 Datasheet

Current PartRFQ

983-025-020R121

NorComp Inc.In Stock: 1253983-025-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The NorComp 983-025-020R121 qualifies as a direct substitute for the 983-025-020-121 based on strict equivalence of the following critical parameters:

• 25-position connector configuration
• Shell Size B compatibility
• 180° cable exit orientation
• Shielded design with identical material composition (Plastic, Metallized)
• Nickel over Copper plating specification
• Strain relief hardware with 4-40 mating screws
• Round cable type compatibility
• Identical D-Sub size compatibility (25pos and HD44pos)

The substitute part differs only in product status (Active vs. Obsolete), packaging format (Bulk vs. standard), and RoHS compliance level, with no impact on form, fit, or function.

Parameter Comparison

Engineering Selection Recommendations

The 983-025-020R121 is the appropriate selection for new designs and ongoing procurement applications. This part maintains complete electrical and mechanical compatibility with the obsolete 983-025-020-121 while offering the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance satisfies current environmental and regulatory requirements
• Identical form, fit, and function eliminate redesign requirements
• Both parts share the same base product number (983-025), confirming manufacturer-validated equivalence

For applications currently using the 983-025-020-121, direct substitution with 983-025-020R121 requires no circuit modifications, mechanical redesign, or functional revalidation.

Frequently Asked Questions (FAQ)

Q: Are these parts electrically and mechanically identical?

A: Yes. Both parts share identical specifications for position count, shell size, cable exit angle, shielding configuration, material composition, plating, and hardware. They are form, fit, and function equivalents.

Q: Why is the main part listed as obsolete?

A: The 983-025-020-121 has been discontinued by NorComp Inc. The 983-025-020R121 is the active equivalent and is the recommended part for all new procurement.

Q: What is the difference between standard and bulk packaging?

A: Packaging format does not affect component performance or compatibility. Bulk packaging typically indicates larger quantity units. Selection depends on procurement volume requirements.

Q: Does the RoHS compliance difference affect compatibility?

A: No. The RoHS3 compliance of the substitute part represents an improvement in environmental and regulatory standing. Both parts are mechanically and electrically compatible in all applications.

Q: Can I use 983-025-020R121 as a direct replacement in existing assemblies?

A: Yes. No modifications to PCB layouts, mechanical mounting, or connector interfaces are required. The substitute part is a direct replacement.

Q: Are there any certifications or compliance differences I should consider?

A: The substitute part (983-025-020R121) is ROHS3 compliant, while the main part is RoHS non-compliant. Both parts are REACH Unaffected and classified under ECCN EAR99. For applications with specific compliance requirements, the substitute part offers improved regulatory alignment.