DBUH-25S-FO D-Sub Connector Housing Equivalent & Substitute Parts

Part Overview

The DBUH-25S-FO is a D-Sub receptacle housing designed for female contacts in a 25-position configuration. Manufactured by Cinch Connectivity Solutions, this connector is actively produced and widely used in applications requiring standard D-Sub interconnection. The housing is supplied without contacts, allowing for custom contact configuration based on application requirements. Finding equivalent or substitute housings becomes necessary when managing inventory across multiple suppliers, accommodating design revisions, or addressing component availability constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

DBUH-25S-FO

Cinch Connectivity SolutionsIn Stock: 1263DBUH-25S-FO Datasheet

Current PartRFQ

L777RRB25PVF

Amphenol ICC (Commercial Products)In Stock: 856L777RRB25PVF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of D-Sub connector housings is determined by strict alignment of the following parameters:

• Connector Style & Type: Both main and substitute parts must be D-Sub connectors. However, the DBUH-25S-FO is a receptacle for female contacts, while the identified substitute L777RRB25PVF is a plug for male contacts. This represents a mating pair relationship rather than a direct equivalent.
• Position Count & Layout: Both parts feature 25 positions in a 2-row configuration with Shell Size 3 (DB, B) layout, ensuring mechanical compatibility.
• Mounting Configuration: Both are free hanging (in-line) designs, supporting identical installation methods.
• Operating Temperature: The DBUH-25S-FO operates from -65°C to 125°C, while L777RRB25PVF operates from -55°C to 125°C. The substitute has a narrower lower temperature limit.
• Material & Finish: Shell materials differ (zinc chromate plated steel vs. tin plated steel), affecting corrosion resistance profiles.
• Compliance: Both parts are RoHS compliant with MSL 1 rating, meeting modern environmental and moisture handling standards.

The L777RRB25PVF functions as the complementary mating housing for the DBUH-25S-FO in complete connector assemblies, not as a direct replacement housing.

Parameter Comparison

Engineering Selection Recommendations

Both the DBUH-25S-FO and L777RRB25PVF are actively produced components with RoHS compliance and MSL 1 ratings, confirming their suitability for modern manufacturing and long-term storage without moisture sensitivity constraints.

The L777RRB25PVF serves as the mating plug housing for the DBUH-25S-FO receptacle housing in complete D-Sub connector assemblies. When selecting between these parts, consider:

• Connector Pairing: Use DBUH-25S-FO as the receptacle (female contact housing) and L777RRB25PVF as the plug (male contact housing) for standard mating pairs.
• Temperature Operating Range: If applications require operation below -55°C, the DBUH-25S-FO provides extended lower temperature capability (-65°C minimum).
• Shell Finish: Zinc chromate plating on the DBUH-25S-FO offers different corrosion resistance characteristics compared to tin plating on the L777RRB25PVF; select based on environmental exposure requirements.
• Dielectric Material: Both use glass-filled thermoplastics; PA/Nylon (DBUH-25S-FO) and PBT (L777RRB25PVF) have different mechanical and thermal properties suitable for specific application environments.

Frequently Asked Questions (FAQ)

Q: Can the L777RRB25PVF directly replace the DBUH-25S-FO in existing designs?

A: No. The DBUH-25S-FO is a receptacle housing for female contacts, while the L777RRB25PVF is a plug housing for male contacts. They are complementary mating parts, not direct replacements. Direct replacement requires a receptacle housing from the same or equivalent manufacturer.

Q: What determines compatibility between these D-Sub housings?

A: Compatibility is determined by connector style (D-Sub), position count (25), row configuration (2), shell size (3/DB/B), and mounting type (free hanging in-line). Both parts meet these criteria for mating pair compatibility.

Q: Are there temperature limitations when pairing these housings?

A: The DBUH-25S-FO operates from -65°C to 125°C, while the L777RRB25PVF operates from -55°C to 125°C. When used as a mating pair, the system is limited to the narrower range of -55°C to 125°C.

Q: Do both housings require the same contact types?

A: No. The DBUH-25S-FO accepts female contacts, while the L777RRB25PVF accepts male contacts. Contact selection must match the housing type. Both housings are supplied without contacts.

Q: Are both parts RoHS compliant?

A: Yes. Both the DBUH-25S-FO and L777RRB25PVF are RoHS compliant with MSL 1 (unlimited moisture sensitivity level), meeting environmental and storage requirements for modern applications.

Q: What is the difference in shell material finish between these parts?

A: The DBUH-25S-FO uses clear chromate plated zinc finish, while the L777RRB25PVF uses tin plating. These finishes provide different corrosion resistance profiles; selection depends on environmental exposure and application requirements.