AB991 D-Sub Gender Changer Connector - Equivalent & Substitute Parts

Part Overview

The AB991 is a 9-position D-Sub gender changer connector manufactured by Assmann WSW Components. This shielded accessory enables connection between two 9-position D-Sub connectors of the same gender, converting them to opposite genders for mating purposes. The part is classified as obsolete, making identification of active equivalent components essential for ongoing system maintenance and new procurement requirements.

Substiute Parts

AB991

Assmann WSW ComponentsIn Stock: 1085AB991 Datasheet

Current PartRFQ

957-009-020R121

NorComp Inc.In Stock: 660957-009-020R121 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AB991 is determined by the following critical parameters:

• Accessory Type: Must be Gender Changer
• Number of Positions: Must be 9, 9
• Compatible Shell Size: Must be E, E
• Compatible D-Sub Size: Must support 9pos and HD 15pos
• Shielding: Must be Shielded
• Primary Material: Must be Metal
• Material Composition: Must be Plastic, Metallized

The substitute part 957-009-020R121 from NorComp Inc. meets all these critical parameters, establishing functional equivalence for the AB991 in applications requiring 9-position shielded gender changer functionality.

Parameter Comparison

Engineering Selection Recommendations

The 957-009-020R121 from NorComp Inc. is the qualified substitute for the obsolete AB991. Selection of this alternative is supported by:

• Functional Equivalence: Identical position count, shell size, and D-Sub compatibility
• Active Product Status: The substitute is currently in active production, ensuring availability and supply chain continuity
• Regulatory Compliance: The 957-009-020R121 achieves ROHS3 compliance, whereas the AB991 is non-compliant, making the substitute preferable for applications subject to RoHS requirements
• Material Specification: Both parts utilize metal primary material with plastic and metallized construction, maintaining mechanical and electrical performance characteristics
• Shielding Integrity: Both parts provide shielded construction for EMI/RFI protection in 9-position D-Sub applications

Frequently Asked Questions (FAQ)

Q: Can the 957-009-020R121 directly replace the AB991 in existing assemblies?

A: Yes. Both parts share identical accessory type, position count, shell size, D-Sub compatibility, shielding, and material composition. The substitute is functionally equivalent for 9-position gender changer applications.

Q: What is the difference in color between the two parts?

A: The AB991 is black; the 957-009-020R121 is silver. Color difference does not affect electrical or mechanical function in gender changer applications.

Q: Does the plating difference impact performance?

A: The 957-009-020R121 specifies nickel over copper plating, while the AB991 does not specify plating. The nickel plating on the substitute provides enhanced corrosion resistance and contact durability.

Q: Is the 957-009-020R121 suitable for RoHS-regulated applications?

A: Yes. The 957-009-020R121 is ROHS3 compliant, making it suitable for applications subject to RoHS directives. The AB991 is non-compliant.

Q: What packaging is available for the substitute part?

A: The 957-009-020R121 is supplied in bag packaging.

Q: Are there any compatibility restrictions between the AB991 and 957-009-020R121?

A: No. Both parts are compatible with 9-position and HD 15-position D-Sub connectors with E-series shell sizes.