983-037-020-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 983-037-020-121 is a 37-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, necessitating identification of functionally equivalent alternatives for ongoing procurement and system maintenance. The substitute part maintains identical electrical and mechanical specifications while offering improved product status and compliance posture.

Substiute Parts

983-037-020-121

NorComp Inc.In Stock: 1154983-037-020-121 Datasheet

Current PartRFQ

983-037-020R121

NorComp Inc.In Stock: 1299983-037-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 983-037-020-121 is determined by strict equivalence across the following critical parameters:

• Position Count: 37 positions (electrical interface requirement)
• Shell Size: C (mechanical form factor)
• D-Sub Compatibility: 37pos and HD62pos (connector family compatibility)
• Cable Exit Angle: 180° (spatial orientation requirement)
• Shielding Configuration: Shielded (electromagnetic performance)
• Accessory Type: Two Piece Backshell (functional design)
• Cable Type: Round (cable accommodation)
• Plating Specification: Nickel over Copper (corrosion resistance and contact performance)
• Hardware: Strain Relief with 4-40 Mating Screws (mechanical integrity)

The substitute part 983-037-020R121 maintains complete equivalence across all specified parameters, with the primary distinction being product status transition from obsolete to active and improved RoHS compliance classification.

Parameter Comparison

Engineering Selection Recommendations

The 983-037-020R121 is the direct functional equivalent for applications currently specified with 983-037-020-121. Selection of the substitute part is supported by the following engineering considerations:

Product Status: The original part is classified as obsolete, creating supply chain risk. The substitute maintains active product status, ensuring continued availability and manufacturer support.

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 regulatory requirements or customer specifications mandating RoHS compliance.

Electrical and Mechanical Equivalence: All functional parameters remain unchanged, including position count, shell size, cable exit angle, shielding configuration, and contact plating specifications. Direct substitution is supported without circuit or mechanical redesign.

Inventory Availability: The substitute part maintains higher inventory levels (1233 pcs vs. 1077 pcs), supporting procurement continuity.

Frequently Asked Questions (FAQ)

Q: Can 983-037-020R121 be used as a direct replacement for 983-037-020-121 in existing designs?

A: Yes. Both parts maintain identical specifications across all electrical and mechanical parameters, including position count, shell size, cable exit angle, shielding, plating, and hardware configuration. Direct substitution is supported without design modification.

Q: What is the significance of the product status change from obsolete to active?

A: Active product status indicates ongoing manufacturer support, continued availability, and compliance with current manufacturing standards. Obsolete status indicates the part is no longer in production and may face supply constraints.

Q: Does the RoHS3 compliance of 983-037-020R121 affect compatibility?

A: No. RoHS3 compliance is a regulatory and environmental attribute that does not alter electrical or mechanical performance. The compliance improvement is beneficial for applications subject to RoHS requirements.

Q: Are there packaging differences between these parts?

A: The original part packaging is not specified in available documentation. The substitute part is supplied in bulk packaging. Confirm packaging requirements with procurement specifications.

Q: What parameters must remain identical for substitution eligibility?

A: Critical parameters for substitution equivalence are: 37-position count, shell size C, 180° cable exit, shielded configuration, two-piece backshell design, round cable type, nickel over copper plating, and 4-40 mating screws. Any deviation in these parameters requires engineering evaluation.