NorComp 978-025-020-121 Equivalent & Substitute Parts

Part Overview

The NorComp 978-025-020-121 is a 25-position two-piece backshell connector with 180° cable exit and shielding. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing procurement and system maintenance. The backshell provides mechanical protection, strain relief, and electromagnetic shielding for D-Sub connector assemblies in applications requiring robust cable management and signal integrity.

Substiute Parts

978-025-020-121

NorComp Inc.In Stock: 1114978-025-020-121 Datasheet

Current PartRFQ

978-025-020R121

NorComp Inc.In Stock: 1132978-025-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 978-025-020R121 is functionally equivalent to the main part based on the following critical parameters that determine substitution validity:

• Number of Positions: Both parts are 25-position connectors
• Compatible Shell Size: Both support Shell Size B
• Compatible D-Sub Size: Both support 25pos and HD44pos configurations
• Cable Exit Angle: Both feature 180° cable exit
• Shielding: Both are shielded designs
• Accessory Type: Both are two-piece backshell connectors
• Material Composition: Both use Plastic, Metallized construction
• Plating Specification: Both feature Nickel over Copper plating
• Hardware Configuration: Both include Assembly Hardware and Strain Relief with 4-40 mating screws
• Color: Both are Silver

The primary distinction is product status: the main part is obsolete while the substitute is active, and the substitute has achieved RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The NorComp 978-025-020R121 is the direct equivalent for the obsolete 978-025-020-121. Selection of the active part is supported by:

• Product Status: The substitute maintains active production status, ensuring continued availability and supply chain reliability
• Regulatory Compliance: The substitute achieves RoHS3 compliance, meeting current environmental and regulatory requirements for electronic components in most jurisdictions
• Functional Equivalence: All mechanical, electrical, and material specifications remain identical, ensuring drop-in compatibility in existing designs
• Certification Alignment: Both parts share identical ECCN (EAR99) and HTSUS (8538.90.8180) classifications, maintaining consistent export and tariff treatment

Frequently Asked Questions (FAQ)

Q: Can the 978-025-020R121 be used as a direct replacement for the 978-025-020-121?

A: Yes. Both parts are identical in all functional parameters including position count, shell size compatibility, cable exit angle, shielding, material composition, plating, and hardware configuration. The substitute is the active production equivalent.

Q: What is the significance of the RoHS3 compliance difference?

A: The substitute part meets RoHS3 (Restriction of Hazardous Substances Directive 3) compliance, which restricts the use of specific hazardous materials in electrical and electronic equipment. The original part is non-compliant. For applications subject to RoHS regulations or customer requirements, the substitute is the appropriate selection.

Q: Are there any mechanical or electrical differences between these parts?

A: No. Both parts feature identical mechanical dimensions, connector pin configurations, shielding effectiveness, and electrical characteristics. The differences are limited to product status and regulatory compliance.

Q: What packaging options are available?

A: The substitute part 978-025-020R121 is available in Bulk packaging. Original packaging specifications for the obsolete part were not provided.

Q: Are both parts compatible with 25-position and HD44-position D-Sub connectors?

A: Yes. Both parts support Shell Size B and are compatible with both 25pos and HD44pos D-Sub connector configurations.