AB938 D-Sub Gender Changer 25/25 Position Equivalent & Substitute Parts

Part Overview

The AB938 is a 25/25 position gender changer connector manufactured by Assmann WSW Components, designed for D-Sub applications requiring shell size B compatibility. This backshell gender changer facilitates connection between two identical D-Sub connectors of 25 positions each.

The AB938 carries an obsolete product status. Locating equivalent or substitute components is necessary for ongoing system maintenance, repair, and new design implementations where this connector type is specified.

Substiute Parts

AB938

Assmann WSW ComponentsIn Stock: 1015AB938 Datasheet

Current PartRFQ

957-025-020R121

NorComp Inc.In Stock: 735957-025-020R121 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AB938 is determined by the following critical parameters:

• Accessory Type: Must be Gender Changer
• Number of Positions: Must be 25, 25
• Compatible Shell Size: Must be B, B
• Compatible D-Sub Size: Must support 25pos and HD44pos
• Color: Must be Silver

The substitute part 957-025-020R121 (NorComp Inc.) satisfies all mandatory substitution criteria. While this substitute introduces differences in material composition (Metal/Plastic, Metallized vs. Plastic), shielding (Shielded vs. unshielded), and plating (Nickel over Copper), these represent functional enhancements rather than incompatibilities. The core mechanical and electrical interface parameters remain aligned.

Parameter Comparison

Engineering Selection Recommendations

The 957-025-020R121 is the designated manufacturer-recommended substitute for the AB938. Selection between these components should be based on the following factors:

For AB938 retention: Applicable only where existing inventory is available and system specifications explicitly require the original part number. Given obsolete status, this option is not sustainable for new procurement.

For 957-025-020R121 adoption: Recommended for all new designs and ongoing maintenance where component availability is required. This substitute offers active product status, ROHS3 compliance, enhanced shielding, and improved material specifications. The substitute maintains full mechanical and electrical interface compatibility with the AB938 across all critical parameters.

Regulatory compliance considerations: The AB938 is RoHS non-compliant, while the 957-025-020R121 is ROHS3 compliant. Both components are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can the 957-025-020R121 directly replace the AB938 in existing applications?

A: Yes. Both components share identical accessory type, position count (25, 25), compatible shell size (B, B), compatible D-Sub size (25pos and HD44pos), and color (Silver). The mechanical and electrical interfaces are fully compatible.

Q: What are the material differences between these components?

A: The AB938 uses plastic construction, while the 957-025-020R121 uses metal with plastic and metallized components. The 957-025-020R121 also includes nickel over copper plating and shielding, providing enhanced durability and electromagnetic performance.

Q: Does the shielding on the 957-025-020R121 affect compatibility?

A: No. Shielding is a functional enhancement that does not compromise mechanical or electrical interface compatibility. It provides additional electromagnetic protection without altering the connector's core functionality.

Q: What is the packaging difference?

A: The AB938 packaging is not specified. The 957-025-020R121 is supplied in bag packaging.

Q: Are there compliance differences I should consider?

A: The AB938 is RoHS non-compliant, while the 957-025-020R121 is ROHS3 compliant. For applications subject to RoHS regulations, the 957-025-020R121 is the appropriate selection. Both components are REACH Unaffected.

Q: Why is the AB938 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 957-025-020R121 is an active product with ongoing availability and support.