L77DA15S1ATN

Part Overview

The L77DA15S1ATN is a 15-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products) with female sockets in a right-angle, through-hole solder configuration. This connector is actively produced and widely used in applications requiring 15-position D-Sub connectivity with robust mechanical and electrical characteristics. Alternative models become necessary when sourcing constraints exist, specific flange features are required for different mounting configurations, or when legacy component compatibility is required.

Substiute Parts

L77DA15S1ATN

Amphenol ICC (Commercial Products)In Stock: 892L77DA15S1ATN Datasheet

Current PartRFQ

173-E15-211R141

NorComp Inc.In Stock: 1158173-E15-211R141 Datasheet

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173-E15-211R241

NorComp Inc.In Stock: 1434173-E15-211R241 Datasheet

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174-E15-211R141

NorComp Inc.In Stock: 1319174-E15-211R141 Datasheet

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DA15S564GTLF

Amphenol ICC (FCI)In Stock: 1213DA15S564GTLF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the L77DA15S1ATN is determined by the following critical parameters: 15 positions, 2-row configuration, DA/A shell size, receptacle connector type with female sockets, right-angle mounting, and solder termination. All substitute parts share these core electrical and mechanical characteristics.

The substitute parts fall into two categories based on availability and compliance status:

Category 1: Active Production (RoHS Compliant) — DA15S564GTLF from Amphenol ICC (FCI) maintains active product status and RoHS compliance, making it suitable for new designs and ongoing production.

Category 2: Obsolete Products (RoHS Non-Compliant) — The NorComp Inc. parts (173-E15-211R141, 173-E15-211R241, 174-E15-211R141) are obsolete legacy components with RoHS non-compliance status. These parts differ in flange features (female screwlock or standard screw options), backset spacing, and current rating, and are listed for reference in legacy system support scenarios.

Parameter Comparison

Engineering Selection Recommendations

For new designs and active production: The DA15S564GTLF is the preferred substitute. It shares active product status with the L77DA15S1ATN, maintains RoHS compliance, meets the same voltage and temperature rating specifications, and ensures long-term supply chain continuity. Both parts use tin-plated steel shells and gold-finished contacts, providing equivalent environmental protection and electrical performance.

For legacy system maintenance: The NorComp Inc. parts (173-E15-211R141, 173-E15-211R241, 174-E15-211R141) remain available in inventory but are categorized as obsolete with RoHS non-compliance. These parts are acceptable only for sustaining engineering on existing products where design specifications have already been locked to these components. The differing backset spacing (0.283" to 0.370" versus the 0.406" standard) and reduced current ratings (5A versus 7.5A) require validation against system-level mechanical and electrical requirements before integration.

Critical selection criteria: Current rating requirements, operating temperature range specifications, RoHS compliance mandates, and backset spacing mechanical constraints determine the appropriate substitute selection.

Frequently Asked Questions (FAQ)

Q: Can the DA15S564GTLF directly replace the L77DA15S1ATN in all applications? A: The DA15S564GTLF shares the same connector type, position count, shell size, mounting style, and termination method. Both are active products with RoHS compliance, 300V voltage ratings, and equivalent operating temperature ranges. The primary differences are packaging format (bulk versus tray) and contact finish specification (GXT™ versus standard gold). Electrical and mechanical compatibility is maintained for standard 15-position D-Sub applications.

Q: What is the primary difference between the NorComp substitute parts? A: The three NorComp parts differ in flange configuration and backset spacing. The 173-E15-211R141 and 174-E15-211R141 feature female screwlock flanges, while the 173-E15-211R241 uses standard screw flanges. Backset spacing varies: 173-E series parts have 0.283" spacing, while 174-E series parts have 0.370" spacing. These dimensional differences affect panel mounting compatibility and require specific mechanical design accommodation.

Q: Are the NorComp parts suitable for new product designs? A: No. All NorComp substitute parts carry obsolete product status and RoHS non-compliance. They are suitable only for sustaining production on existing designs that were originally specified to these components. For new designs, the DA15S564GTLF or the original L77DA15S1ATN should be selected to ensure supply continuity and regulatory compliance.

Q: What does backset spacing mean, and why does it vary? A: Backset spacing is the distance from the connector's rear mounting plane to the contact seating plane. The L77DA15S1ATN specifies 0.406" (10.30mm), while substitutes range from 0.283" to 0.409". This dimension directly affects the printed circuit board trace routing, panel thickness accommodation, and cable strain relief positioning. Substitution with different backset spacing requires mechanical redesign validation.

Q: Why is there a current rating difference between the L77DA15S1ATN and the NorComp parts? A: The L77DA15S1ATN carries a 7.5A current rating, while NorComp parts are rated at 5A per position. This reflects different contact geometry and material properties. If the application requires current levels above 5A, only the L77DA15S1ATN or DA15S564GTLF can be used without derating the system.

Q: What is the significance of RoHS compliance status? A: RoHS compliance restricts hazardous substances such as lead, cadmium, and hexavalent chromium. The L77DA15S1ATN and DA15S564GTLF are RoHS compliant and meet current environmental regulations for both EU and North American markets. NorComp parts, classified as RoHS non-compliant, cannot be used in products destined for regulated markets without documented exception justification.

Q: Can packaging format (tray versus bulk) affect compatibility? A: Packaging format affects storage, handling, and supply chain logistics but does not impact electrical or mechanical compatibility. The L77DA15S1ATN is supplied in tray packaging, while DA15S564GTLF comes in bulk packaging. Selection between these should be based on assembly line requirements and inventory management practices rather than connector function.