NorComp 971-037-020-121 D-Sub Backshell Connector: Equivalent & Substitute Parts

Part Overview

The NorComp 971-037-020-121 is a 37-position two-piece backshell connector with 45° cable exit and shielding, designed for D-Sub applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning. The substitute part maintains identical electrical and mechanical specifications while offering improved product status and compliance posture.

Substiute Parts

971-037-020-121

NorComp Inc.In Stock: 879971-037-020-121 Datasheet

Current PartRFQ

971-037-020R121

NorComp Inc.In Stock: 1343971-037-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 971-037-020R121 qualifies as a direct equivalent based on the following critical parameters:

• 37-position connector configuration
• Shell Size C compatibility
• 45° cable exit angle
• Shielded design
• Two-piece backshell construction
• Round cable type
• Nickel over Copper plating
• 4-40 mating screws
• Silver color finish

The primary distinction between the main part and substitute is product status and compliance certification. The substitute part is manufactured under the ARMOR series designation and maintains active product status with ROHS3 compliance, whereas the original part is obsolete and RoHS non-compliant.

Parameter Comparison

Engineering Selection Recommendations

The NorComp 971-037-020R121 is the direct substitute for the obsolete 971-037-020-121. Selection of the substitute part is supported by:

• Identical electrical and mechanical specifications across all functional parameters
• Active product status ensuring continued availability and manufacturing support
• ROHS3 compliance meeting current environmental and regulatory requirements
• Equivalent inventory availability (1277 pcs in stock)
• Same manufacturer and series lineage, confirming design continuity

For applications currently using the 971-037-020-121, transition to 971-037-020R121 presents no functional or compatibility constraints. The substitute part operates within identical electrical and mechanical parameters and is suitable for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Are the 971-037-020-121 and 971-037-020R121 mechanically interchangeable?

A: Yes. Both parts share identical shell size (C), position count (37), cable exit angle (45°), and mating hardware (4-40 screws). Physical installation and connector interface are equivalent.

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

A: The primary differences are product status and compliance. The 971-037-020-121 is obsolete and RoHS non-compliant. The 971-037-020R121 is active and ROHS3 compliant. All functional specifications are identical.

Q: Can I use 971-037-020R121 in place of 971-037-020-121 in existing assemblies?

A: Yes. The substitute part maintains all electrical and mechanical specifications required for direct replacement. No design modifications are necessary.

Q: What does the "R" designation in 971-037-020R121 indicate?

A: The "R" designation indicates the part is manufactured under the ARMOR series and represents the current production version with updated compliance certifications.

Q: Are there packaging differences between these parts?

A: The 971-037-020-121 packaging is not specified in available documentation. The 971-037-020R121 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: What is the cable type compatibility for these backshells?

A: Both parts are designed for round cable types with 45° exit angle. Confirm cable diameter compatibility with your specific application requirements.