979-025-030-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 979-025-030-121 is a 25-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, which necessitates identification of active equivalent parts to maintain supply chain continuity and ensure long-term component availability for new designs and field replacements.

Substiute Parts

979-025-030-121

NorComp Inc.In Stock: 985979-025-030-121 Datasheet

Current PartRFQ

979-025-030R121

NorComp Inc.In Stock: 5960979-025-030R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 979-025-030R121 qualifies as a direct equivalent based on the following critical parameters that determine functional interchangeability:

• Number of Positions: 25 (identical)
• Compatible Shell Size: B (identical)
• Compatible D-Sub Size: 25pos and HD44pos (identical)
• Cable Exit Angle: 180° (identical)
• Shielding Configuration: Shielded (identical)
• Material Composition: Metal, Zinc Alloy (identical)
• Plating Specification: Nickel (identical)
• Mating Hardware: Mating Screws 4-40 (identical)
• Color: Silver (identical)

The substitute part maintains all electrical and mechanical parameters required for direct substitution while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The 979-025-030R121 is the direct substitute for the obsolete 979-025-030-121. Selection of the substitute part is based on the following factors:

Product Status: The substitute part carries Active status, ensuring continued availability and manufacturer support, whereas the main part is classified as Obsolete.

Regulatory Compliance: The substitute part is ROHS3 Compliant, meeting current environmental and hazardous substance restrictions. The main part is RoHS non-compliant and does not meet modern regulatory requirements for new designs or procurement.

Functional Equivalence: All electrical and mechanical parameters are identical between the two parts, including connector configuration, shielding, material composition, and mating hardware specifications.

Supply Chain Continuity: The substitute part maintains higher inventory levels (5901 Pcs) compared to the main part (925 Pcs), supporting consistent component availability.

Frequently Asked Questions (FAQ)

Q: Can 979-025-030R121 be used as a direct replacement for 979-025-030-121?

A: Yes. Both parts share identical specifications for number of positions (25), compatible shell size (B), cable exit angle (180°), shielding configuration, material composition, plating, and mating hardware. The substitute part is functionally and mechanically interchangeable.

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

A: The primary differences are product status and regulatory compliance. The 979-025-030R121 is an active product with ROHS3 compliance, while the 979-025-030-121 is obsolete and RoHS non-compliant. Both parts are identical in form, fit, and function.

Q: Are there packaging differences between these parts?

A: The main part number does not specify packaging information. The substitute part 979-025-030R121 is supplied in Bulk packaging.

Q: What does the "R" in 979-025-030R121 indicate?

A: The "R" designation indicates the revised or current production version of the backshell connector, reflecting the active product status and updated compliance certifications.

Q: Is the substitute part compatible with existing D-Sub connector assemblies?

A: Yes. The substitute part maintains compatibility with 25-position and HD44-position D-Sub connectors due to identical shell size (B) and mechanical specifications.

Q: What is the Moisture Sensitivity Level (MSL) for the substitute part?

A: The substitute part has an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.