L77DBH25S1AMN: Equivalent & Substitute Parts

Part Overview

The L77DBH25S1AMN is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring right-angle solder termination and board-side mounting. This connector is currently active in production. Equivalent and substitute parts may be required due to supply chain constraints, design revision updates, or specific application requirements that demand alternative mechanical or electrical configurations.

Substiute Parts

L77DBH25S1AMN

Amphenol ICC (Commercial Products)In Stock: 855L77DBH25S1AMN Datasheet

Current PartRFQ

173-E25-213R001

NorComp Inc.In Stock: 1275173-E25-213R001 Datasheet

SimilarRFQ

174-E25-211R001

NorComp Inc.In Stock: 1217174-E25-211R001 Datasheet

SimilarRFQ

174-E25-211R141

NorComp Inc.In Stock: 1041174-E25-211R141 Datasheet

SimilarRFQ

174-E25-211R241

NorComp Inc.In Stock: 1127174-E25-211R241 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Fixed Requirements (Non-negotiable):

• Connector Style: D-Sub
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 25
• Number of Rows: 2
• Shell Size/Layout: 3 (DB, B)
• Termination Method: Solder

Variable Parameters (Determine Substitute Category):

• Mounting Type (Through Hole, Right Angle vs. Panel Mount variations)
• Flange Feature (Board Side vs. Housing/Shell vs. Mating Side configurations)
• Shell Material/Finish (Steel Tin Plated vs. Nickel Plated vs. Yellow Chromate Plated)
• Contact Material (Brass vs. Copper)
• Current Rating (7.5A primary vs. 5A for substitutes)
• Operating Temperature Range (-55°C to 125°C vs. -50°C to 100°C)
• RoHS/Compliance Status (Active RoHS Compliant vs. Obsolete/Non-compliant)
• Backset Spacing (0.406" vs. 0.283" vs. 0.370")

The substitute parts listed below maintain the core functional requirements (25-position D-Sub receptacle, solder termination, right-angle mounting) while differing in secondary mechanical features, material finishes, and compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation (Active Status): 173-E25-213R001 (NorComp) is the preferred equivalent for new designs and current applications. This part maintains RoHS3 compliance and active production status, matching the functional characteristics of the L77DBH25S1AMN. The primary differences are housing-side flange configuration (unthreaded), nickel plating finish, and reduced backset spacing (0.283"). These variations require mechanical layout verification but do not compromise electrical performance within specified ratings.

Secondary Alternatives (Obsolete Status): 174-E25-211R001, 174-E25-211R141, and 174-E25-211R241 (NorComp) are electrically compatible but carry obsolete product status and RoHS non-compliance. These parts are available in existing inventories but should not be specified for new designs. Selection from this group depends on specific panel-mount or mating-side flange requirements that the primary part does not satisfy. The reduced operating temperature range (-50°C to 100°C) limits use in extended temperature applications.

Compliance Considerations: Applications requiring RoHS compliance must use either L77DBH25S1AMN or 173-E25-213R001. The 174-E25-211 series parts are non-compliant and suitable only for legacy system support or non-regulated markets.

Current Rating Variance: The main part supports 7.5A; all substitute parts are rated at 5A. For applications requiring current capacity above 5A, the L77DBH25S1AMN is the only suitable option among these parts.

Frequently Asked Questions (FAQ)

Q: Can I use 173-E25-213R001 as a direct drop-in replacement for L77DBH25S1AMN? A: Functionally, yes, provided your mechanical layout accommodates the different backset spacing (0.283" vs. 0.406") and housing-side flange configuration. Electrical ratings and contact density remain equivalent. Board-level footprints must be verified for compatibility.

Q: What is the impact of reduced backset spacing in 173-E25-213R001? A: Backset spacing determines the distance from the mounting plane to the mating connector face. The 173-E25-213R001 has approximately 0.123" less backset than the L77DBH25S1AMN. This affects panel cutout positioning and cable clearance planning during assembly. PCB mounting holes and cable routing must be re-evaluated.

Q: Why do the 174-E25-211 series parts show obsolete status? A: Obsolete status indicates these parts are no longer in active production. While existing inventory may be available, manufacturers do not guarantee long-term supply. These parts should be used only when required for repair of existing systems or in applications where supply continuity is not a concern.

Q: Are there differences in contact plating that affect reliability? A: Yes. The L77DBH25S1AMN uses 8.00µin gold plating; the substitute parts use flash gold plating. Flash plating is thinner but meets gold contact requirements for signal-level applications. This difference is acceptable for standard D-Sub signal circuits but may require evaluation in high-reliability or corrosive-environment applications.

Q: Which substitute part supports the highest operating temperature? A: The 173-E25-213R001 maintains the full temperature range (-55°C to 125°C) equivalent to the main part. The 174-E25-211 series is limited to -50°C to 100°C, making it unsuitable for applications requiring full -55°C operation or temperatures above 100°C.

Q: Can I use a 174-E25-211 series part if my application requires RoHS compliance? A: No. All 174-E25-211 variants are RoHS non-compliant. Only L77DBH25S1AMN (RoHS Compliant) and 173-E25-213R001 (ROHS3 Compliant) meet regulatory requirements. Use of 174-E25-211 parts in RoHS-regulated products is not permissible.

Q: What is the significance of contact material differences (Brass vs. Copper)? A: Contact material affects corrosion resistance and mechanical durability. Brass (used in L77DBH25S1AMN, 174-E25-211 series) provides superior corrosion resistance compared to copper (173-E25-213R001). In neutral or benign environments, copper contacts are functionally equivalent. In corrosive or marine environments, brass contacts are preferred.

Q: Do all these connectors accommodate the same gauge wire in solder termination? A: Wire gauge information is not provided in the specifications. Termination compatibility must be verified with the individual connector datasheets before implementation. Solder cup dimensions may vary between manufacturers.