976-037-020-121 Equivalent & Substitute Parts

Part Overview

The 976-037-020-121 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, which necessitates identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and field service applications.

Key Parameters

Parameter	Specification
Manufacturer Part Number	976-037-020-121
Manufacturer	NorComp Inc.
Category	D-Sub, D-Shaped Connectors
Accessory Type	Two Piece Backshell
Number of Positions	37
Compatible Shell Size	C
Compatible D-Sub Size	37pos and HD62pos
Cable Exit	180°
Shielding	Shielded
Plating	Nickel over Copper
Hardware	Assembly Hardware, Strain Relief
Mating Screws	4-40
Color	Silver
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 976-037-020-121 is determined by strict equivalence across the following critical parameters:

Accessory Type: Two Piece Backshell (identical configuration required)
Number of Positions: 37 (exact match required)
Compatible Shell Size: C (mechanical fit requirement)
Compatible D-Sub Size: 37pos and HD62pos (connector interface compatibility)
Cable Exit Angle: 180° (installation geometry requirement)
Shielding Configuration: Shielded (electromagnetic performance requirement)
Plating Specification: Nickel over Copper (corrosion resistance and contact performance)
Hardware: Assembly Hardware, Strain Relief with 4-40 Mating Screws (mechanical assembly compatibility)

The substitute part 976-037-020R121 maintains full electrical and mechanical equivalence across all specified parameters while offering improved product status and regulatory compliance.

Parameter Comparison

Parameter	976-037-020-121	976-037-020R121	Equivalence
Manufacturer	NorComp Inc.	NorComp Inc.	Identical
Category	D-Sub, D-Shaped Connectors	D-Sub, D-Shaped Connectors	Identical
Accessory Type	Two Piece Backshell	Two Piece Backshell	Identical
Number of Positions	37	37	Identical
Compatible Shell Size	C	C	Identical
Compatible D-Sub Size	37pos and HD62pos	37pos and HD62pos	Identical
Cable Type	Flat	Flat	Identical
Cable Exit	180°	180°	Identical
Shielding	Shielded	Shielded	Identical
Primary Material	Plastic	Plastic	Identical
Material	Plastic, Metallized	Plastic, Metallized	Identical
Plating	Nickel over Copper	Nickel over Copper	Identical
Hardware	Assembly Hardware, Strain Relief	Assembly Hardware, Strain Relief	Identical
Mating Screws	4-40	4-40	Identical
Color	Silver	Silver	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8538.90.8180	8538.90.8180	Identical
Product Status	Obsolete	Active	Upgrade
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Upgrade

Engineering Selection Recommendations

The 976-037-020R121 is the direct active equivalent for the obsolete 976-037-020-121. Selection of the substitute part is based on the following engineering criteria:

Product Status: The original part number is classified as Obsolete, creating supply chain risk. The substitute maintains identical electrical and mechanical specifications while offering Active product status, ensuring continued availability and manufacturer support.

Regulatory Compliance: The 976-037-020R121 achieves ROHS3 Compliant status, whereas the original part is RoHS non-compliant. Both parts maintain identical REACH Unaffected and EAR99 ECCN classifications. For applications subject to RoHS directives, the substitute part satisfies regulatory requirements without design modification.

Functional Equivalence: All critical parameters determining connector performance, mechanical fit, and electrical characteristics are identical between the two part numbers. Direct substitution is supported without circuit redesign or mechanical rework.

Frequently Asked Questions (FAQ)

Q: Can 976-037-020R121 be used as a direct replacement for 976-037-020-121 in existing designs?

A: Yes. The substitute part maintains identical specifications across all electrical and mechanical parameters, including connector position count, shell size compatibility, cable exit angle, shielding configuration, plating, and hardware specifications. Direct substitution is supported without design modification.

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

A: The primary differences are product status and regulatory compliance. The 976-037-020-121 is Obsolete and RoHS non-compliant, while the 976-037-020R121 is Active and ROHS3 Compliant. All functional and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The original part number does not specify packaging information. The substitute part 976-037-020R121 is supplied in Bulk packaging. Verify packaging requirements for your procurement process.

Q: Does the RoHS3 compliance of 976-037-020R121 affect performance in non-RoHS applications?

A: No. RoHS3 compliance indicates material composition restrictions that do not alter electrical performance, mechanical fit, or functional characteristics. The part performs identically in all applications.

Q: Are both parts manufactured by the same company?

A: Yes. Both 976-037-020-121 and 976-037-020R121 are manufactured by NorComp Inc. and belong to the same 976 series product line.

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