981-025-030-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 981-025-030-121 is a 25-position two-piece backshell connector manufactured by NorComp Inc., designed for D-Sub applications with 90° 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 operates within the D-Sub, D-Shaped Connectors category and serves as a mechanical accessory for connector assemblies requiring shielded backshell protection.

Substiute Parts

981-025-030-121

NorComp Inc.In Stock: 790981-025-030-121 Datasheet

Current PartRFQ

981-025-030R121

NorComp Inc.In Stock: 893981-025-030R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 981-025-030-121 is determined by strict alignment of the following critical parameters:

• Number of Positions: Must be 25
• Compatible Shell Size: Must be B
• Compatible D-Sub Size: Must support 25pos and HD44pos
• Cable Exit Angle: Must be 90°
• Shielding Configuration: Must be Shielded
• Accessory Type: Must be Two Piece Backshell
• Material Composition: Must be Metal, Zinc Alloy
• Plating Specification: Must be Nickel over Copper
• Color: Must be Silver

The substitute part 981-025-030R121 meets all specified electrical and mechanical parameters, maintaining functional equivalence while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The 981-025-030R121 serves as the direct functional equivalent to the obsolete 981-025-030-121. Both parts maintain identical mechanical and electrical specifications across all critical parameters including position count, shell size, cable exit angle, shielding configuration, and material composition.

The substitute part offers two significant advantages:

1. Product Status: The 981-025-030R121 maintains Active status, ensuring continued availability and manufacturer support, whereas the original part is classified as Obsolete.

2. Regulatory Compliance: The 981-025-030R121 is ROHS3 Compliant, meeting current environmental and hazardous substance restrictions. The original part is RoHS non-compliant, which may present procurement and deployment constraints in regulated applications.

Both parts share identical REACH and ECCN classifications, maintaining equivalent export and regulatory standing.

Frequently Asked Questions (FAQ)

Q: What makes 981-025-030R121 a valid substitute for 981-025-030-121?

A: The substitute part maintains identical specifications across all critical parameters: 25-position configuration, Shell Size B compatibility, 90° cable exit, shielded design, metal zinc alloy construction, and nickel over copper plating. Both parts are manufactured by NorComp Inc. and support the same D-Sub connector sizes (25pos and HD44pos).

Q: Are there any mechanical compatibility differences between these parts?

A: No. Both parts are two-piece backshells with identical material composition, plating, color, and cable exit specifications. They are mechanically interchangeable within D-Sub connector assemblies.

Q: What is the significance of the product status difference?

A: The original part (981-025-030-121) is classified as Obsolete, indicating discontinued manufacturing and limited availability. The substitute (981-025-030R121) is Active, ensuring ongoing production, inventory availability, and manufacturer technical support.

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

A: No. RoHS3 compliance represents an improvement in environmental and regulatory standing. The substitute part meets current hazardous substance restrictions while maintaining identical electrical and mechanical function. This compliance status does not impact physical or electrical compatibility.

Q: Are packaging differences relevant to substitution?

A: The original part packaging is unspecified, while the substitute is supplied in Bulk packaging. Packaging format does not affect component function or mechanical compatibility; it relates only to order quantity and handling procedures.

Q: Can these parts be used interchangeably in existing assemblies?

A: Yes. The 981-025-030R121 is a direct substitute with identical specifications for all functional parameters. No design modifications or assembly procedure changes are required.