971-037-030-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 971-037-030-121 is a 37-position two-piece backshell connector manufactured by NorComp Inc., designed for D-Sub applications with 45° cable exit and shielded construction. 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 critical interface component in connector assemblies requiring shielded, angled cable management.

Substiute Parts

971-037-030-121

NorComp Inc.In Stock: 1032971-037-030-121 Datasheet

Current PartRFQ

971-037-030R121

NorComp Inc.In Stock: 1063971-037-030R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 971-037-030-121 is determined by strict alignment with the following critical parameters:

• Position Count: 37 positions (non-negotiable for connector compatibility)
• Shell Size: C-size shell (mechanical fit requirement)
• D-Sub Compatibility: 37pos and HD62pos (interface standard)
• Cable Exit Configuration: 45° angle (spatial and installation requirement)
• Shielding Type: Shielded construction (electromagnetic performance)
• Accessory Classification: Two-piece backshell (functional design)
• Material Composition: Metal with Zinc base (corrosion resistance)
• Plating System: Nickel over Copper (contact reliability)
• Hardware Specification: 4-40 mating screws (assembly compatibility)

The substitute part 971-037-030R121 meets all these criteria and represents a direct functional equivalent with enhanced product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 971-037-030R121 is the direct substitute for the obsolete 971-037-030-121. Both parts maintain identical mechanical and electrical specifications across all critical parameters: 37-position configuration, C-size shell compatibility, 45° cable exit, shielded construction, and 4-40 mating hardware.

The substitute part offers two significant advantages:

1. Product Status: The 971-037-030R121 maintains active production status, ensuring long-term availability and supply chain continuity.

2. Regulatory Compliance: The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This distinction is material for applications subject to RoHS directives or customer compliance requirements.

Both parts share identical REACH and ECCN classifications (REACH Unaffected, EAR99), confirming equivalent regulatory treatment in export and environmental contexts.

Frequently Asked Questions (FAQ)

Q: Can the 971-037-030R121 be used as a direct replacement for the 971-037-030-121?

A: Yes. Both parts are identical in mechanical fit, electrical performance, and functional operation. The substitute maintains the same 37-position count, C-size shell, 45° cable exit angle, shielded construction, and 4-40 hardware specification.

Q: What is the primary difference between these two parts?

A: The main differences are product status and regulatory compliance. The 971-037-030R121 is in active production and ROHS3 compliant, while the 971-037-030-121 is obsolete and RoHS non-compliant.

Q: Are there packaging differences between the main part and substitute?

A: The original part (971-037-030-121) has no specified packaging designation. The substitute (971-037-030R121) is supplied in bulk packaging. This distinction affects procurement and inventory management but does not impact functional compatibility.

Q: Does the material composition difference (Zinc vs. Zinc Alloy) affect compatibility?

A: No. Both materials provide equivalent corrosion resistance and mechanical properties for this application. The Zinc Alloy composition in the substitute represents a material refinement within the same functional class.

Q: Are both parts suitable for applications requiring RoHS compliance?

A: Only the 971-037-030R121 meets ROHS3 compliance requirements. Applications subject to RoHS directives must use the substitute part.

Q: What is the inventory status for each part?

A: The original part (971-037-030-121) has 991 pieces in stock. The substitute (971-037-030R121) has 1047 pieces in stock. Both are available as new original components.