L777DFBF25P D-Sub 25 Position Panel Mount Plug Connector

Part Overview

The L777DFBF25P is a 25 position D-Sub plug connector manufactured by Amphenol ICC (Commercial Products). This connector features male pins, panel mount configuration, and solder cup termination. The part is currently in active production status with 713 units in stock.

Equivalent and substitute parts become necessary when the primary part experiences supply constraints, obsolescence of related product lines, or when design requirements permit alternative connector configurations. This reference provides engineering-validated substitute options based on strict electrical and mechanical parameter compatibility.

Substiute Parts

L777DFBF25P

Amphenol ICC (Commercial Products)In Stock: 725L777DFBF25P Datasheet

Current PartRFQ

172-025-102R001

NorComp Inc.In Stock: 1405172-025-102R001 Datasheet

SimilarRFQ

DBP25P065TXLF

Amphenol ICC (FCI)In Stock: 830DBP25P065TXLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for D-Sub 25 position connectors is determined by the following critical parameters:

Primary Compatibility Criteria:

• Connector type (Plug with Male Pins)
• Number of positions (25)
• Shell size and layout (Size 3, DB/B configuration)
• Termination method (Solder Cup)
• Mounting interface (Panel Mount or Free Hanging compatibility)

Secondary Compatibility Criteria:

• Current rating (minimum 5A acceptable for signal applications)
• Voltage rating (minimum 300V)
• Operating temperature range (must encompass -55°C to 125°C or be suitable for intended application)
• Contact finish (Gold plated acceptable)
• RoHS compliance status

Identified Substitutes:

1. 172-025-102R001 (NorComp Inc.) – Functionally equivalent 25 position D-Sub plug with panel mount configuration. Product status is obsolete; current inventory available.

2. DBP25P065TXLF (Amphenol ICC / FCI) – 25 position D-Sub plug with solder cup termination. Mounting type differs (Free Hanging/In-Line vs. Panel Mount); electrical ratings exceed primary part specifications.

Parameter Comparison

Engineering Selection Recommendations

L777DFBF25P (Primary Selection)

Recommended for new designs and applications requiring active product status. This connector maintains full production support from Amphenol ICC (Commercial Products). RoHS compliance and current production status ensure long-term availability and supply chain stability. Operating temperature range of -55°C to 125°C and 7.5A current rating support standard industrial signal applications.

172-025-102R001 (Conditional Substitute)

This NorComp Inc. connector provides functional equivalence for panel mount D-Sub 25 position applications. However, product status is obsolete, indicating discontinued manufacturing. Selection of this part is appropriate only when existing inventory must be utilized or when legacy system compatibility is required. Operating temperature range (-50°C to 100°C) is narrower than the primary part. Current rating of 5A is suitable for signal-level applications but lower than the primary part. Voltage rating is not specified in available documentation.

DBP25P065TXLF (Alternative for Different Mounting Requirements)

This Amphenol ICC (FCI) connector is active production status with electrical ratings exceeding the primary part (1000V voltage rating, 7.5A per contact). However, mounting type differs significantly: this part is configured for free hanging (in-line) termination rather than panel mount. Selection of DBP25P065TXLF is appropriate only when application requirements permit in-line mounting configuration. This part is suitable for applications requiring higher voltage ratings or when panel mount is not a design constraint.

Frequently Asked Questions (FAQ)

Q: Can 172-025-102R001 be used as a direct replacement for L777DFBF25P?

A: 172-025-102R001 provides functional equivalence for panel mount D-Sub 25 position plug applications with solder cup termination. Both connectors share identical shell size (Size 3, DB/B), position count (25), and mounting configuration (Panel Mount). However, 172-025-102R001 is obsolete product status. Operating temperature range is -50°C to 100°C versus -55°C to 125°C for L777DFBF25P. Current rating is 5A versus 7.5A. Substitution is valid when application operating conditions fall within the narrower temperature and current specifications of the NorComp part.

Q: Why is DBP25P065TXLF listed as a substitute if the mounting type is different?

A: DBP25P065TXLF shares core D-Sub connector specifications (25 positions, Size 3 shell, male pins, solder cup termination) but differs in mounting configuration. It is listed as a substitute option for applications where panel mount is not a design requirement. Free hanging (in-line) mounting is suitable for cable assemblies and applications where the connector attaches directly to wire harnesses rather than panel surfaces. Electrical performance exceeds L777DFBF25P specifications.

Q: What is the significance of contact finish thickness specifications?

A: L777DFBF25P and DBP25P065TXLF both specify 30.0µin (0.76µm) gold contact finish thickness, providing consistent contact resistance and durability. 172-025-102R001 specifies flash gold finish, which is thinner and may result in different contact wear characteristics over extended mating cycles. For applications requiring consistent contact performance across multiple mating operations, the 30.0µin specification is preferred.

Q: Are all three connectors RoHS compliant?

A: L777DFBF25P is RoHS Compliant. Both 172-025-102R001 and DBP25P065TXLF are ROHS3 Compliant. ROHS3 represents an updated compliance designation. All three parts meet RoHS requirements for restricted substance elimination.

Q: What is the difference between panel mount and free hanging termination?

A: Panel mount connectors (L777DFBF25P and 172-025-102R001) feature a flange or housing designed to attach to a panel or enclosure surface, with the connector body protruding through an opening. Free hanging (in-line) connectors (DBP25P065TXLF) attach directly to cable assemblies without panel mounting hardware. Selection depends on application mechanical design: panel mount for fixed installations, free hanging for cable-based interconnections.

Q: Can operating temperature range differences affect substitution decisions?

A: Yes. L777DFBF25P operates from -55°C to 125°C. 172-025-102R001 operates from -50°C to 100°C. If the application requires operation below -50°C or above 100°C, 172-025-102R001 is not suitable. DBP25P065TXLF matches the full -55°C to 125°C range. Operating temperature range must be verified against actual application requirements before substitution.

Q: What does "Grounding Indents" feature indicate?

A: Grounding indents are mechanical features on the connector shell that provide additional grounding contact points or strain relief. All three connectors include this feature, ensuring consistent EMI shielding and mechanical stability across substitution options.