974-037-020-121 D-Sub Backshell Connector Equivalent & Substitute Parts

Part Overview

The 974-037-020-121 is a 37-position two-piece backshell connector manufactured by NorComp Inc., designed for D-Sub applications with a 40° cable exit angle and shielded configuration. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The part features silver plating, nickel over copper finish, and includes assembly hardware with 4-40 mating screws suitable for round cable applications.

Substiute Parts

974-037-020-121

NorComp Inc.In Stock: 1002974-037-020-121 Datasheet

Current PartRFQ

974-037-020R121

NorComp Inc.In Stock: 1106974-037-020R121 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 974-037-020-121 is determined by strict equivalence across the following critical parameters:

• Number of Positions: 37
• Compatible Shell Size: C
• Compatible D-Sub Size: 37pos and HD62pos
• Cable Exit Angle: 40°
• Shielding: Shielded
• Cable Type: Round
• Plating: Nickel over Copper
• Mating Screws: 4-40
• Color: Silver

The identified substitute part maintains identical electrical and mechanical specifications across all these parameters, ensuring direct functional compatibility without design modification or system reconfiguration.

Parameter Comparison

Engineering Selection Recommendations

The 974-037-020R121 serves as the direct functional equivalent to the obsolete 974-037-020-121. Both parts are manufactured by NorComp Inc. and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the 974-037-020-121 is obsolete, while the 974-037-020R121 is active and currently in production.

The 974-037-020R121 additionally provides ROHS3 compliance, whereas the original part is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements for electronic component procurement in many jurisdictions. Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99).

For applications requiring the 37-position D-Sub backshell with 40° cable exit and shielded configuration, the 974-037-020R121 is the appropriate selection for new designs and replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the 974-037-020R121 directly replace the 974-037-020-121 without design changes?

A: Yes. Both parts maintain identical specifications for number of positions (37), shell size (C), cable exit angle (40°), shielding configuration, plating, and hardware. Direct substitution is possible without modification to connector interfaces or cable assemblies.

Q: What is the significance of the product status difference?

A: The 974-037-020-121 is classified as obsolete, indicating it is no longer manufactured or supported by NorComp Inc. The 974-037-020R121 is active and in current production, ensuring availability for procurement and long-term supply chain reliability.

Q: Does the RoHS3 compliance of the 974-037-020R121 affect compatibility?

A: No. RoHS3 compliance indicates adherence to hazardous substance restrictions and does not alter electrical or mechanical performance. The improved compliance status of the substitute part is beneficial for applications subject to regulatory requirements.

Q: Are there packaging differences between these parts?

A: The 974-037-020-121 packaging is not specified in available documentation. The 974-037-020R121 is supplied in bulk packaging. Packaging format does not affect functional compatibility; it pertains only to order quantity and handling procedures.

Q: What cable types are compatible with these backshells?

A: Both parts are designed for round cable applications with a 40° exit angle. The shielded configuration provides electromagnetic interference protection suitable for signal integrity in multi-conductor D-Sub assemblies.