AB993 D-Sub Gender Changer Connector - Equivalent & Substitute Parts

Part Overview

The AB993 is a 9/25 position gender changer connector manufactured by Assmann WSW Components, designed for D-Sub applications requiring shielded connectivity between different D-Sub configurations. This connector accommodates both 9-position and 25-position D-Sub sizes with compatible shell sizes B and E. The product is currently obsolete, making identification of active equivalent parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

AB993

Assmann WSW ComponentsIn Stock: 939AB993 Datasheet

Current PartRFQ

957-925-020R121

NorComp Inc.In Stock: 990957-925-020R121 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AB993 is determined by strict equivalence across the following parameters:

• Accessory Type: Must be Gender Changer
• Number of Positions: Must support both 9 and 25 positions
• Compatible Shell Size: Must accommodate B and E shell sizes
• Compatible D-Sub Size: Must support (9pos and HD15pos) and (25pos and HD44pos) configurations
• Shielding: Must be Shielded
• Primary Material: Must be Metal
• Material Composition: Must be Plastic, Metallized

The substitute part 957-925-020R121 meets all these criteria, providing functional and mechanical equivalence to the obsolete AB993.

Parameter Comparison

Engineering Selection Recommendations

The 957-925-020R121 manufactured by NorComp Inc. is the direct equivalent for the obsolete AB993. This substitute maintains identical mechanical and electrical compatibility across all critical parameters: position count, shell size compatibility, D-Sub size support, and shielding configuration.

The substitute part offers additional advantages in terms of product lifecycle status. The 957-925-020R121 is currently active in production, ensuring long-term availability and supply chain stability. The part is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the AB993 is non-compliant. Both parts share identical REACH and ECCN classifications, confirming regulatory equivalence for export and compliance purposes.

The NorComp part includes nickel over copper plating and mating screws (4-40), providing enhanced corrosion resistance and mechanical reliability compared to the unspecified plating of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 957-925-020R121 be used as a direct replacement for AB993 in existing applications?

A: Yes. The substitute part maintains identical mechanical and electrical specifications across all critical parameters: position configuration, shell size compatibility, D-Sub size support, and shielding. No design modifications are required.

Q: What is the significance of the RoHS compliance difference?

A: The AB993 is RoHS non-compliant, while the 957-925-020R121 is ROHS3 compliant. For new designs or applications subject to RoHS regulations, the substitute part is the appropriate choice. For legacy system maintenance where RoHS compliance is not mandated, both parts remain functionally equivalent.

Q: Are there any compatibility concerns with different D-Sub connector sizes?

A: No. Both the AB993 and 957-925-020R121 support identical D-Sub configurations: 9-position with HD15-position compatibility and 25-position with HD44-position compatibility. Shell sizes B and E are supported by both parts.

Q: What is the difference in plating specifications?

A: The AB993 does not specify plating material. The 957-925-020R121 features nickel over copper plating, which provides enhanced corrosion resistance and improved contact reliability in demanding environments.

Q: Is the 957-925-020R121 currently available?

A: Yes. The 957-925-020R121 is an active product with current inventory availability, unlike the obsolete AB993.