L77DA15SA D-Sub Receptacle 15-Position Right Angle Solder Connector

Part Overview

The L77DA15SA is a 15-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets in a right-angle, through-hole solder configuration with a 2-row layout (Shell Size 2, DA/A). The part is currently active in production status with 658 units in stock.

The L77DA15SA is specified for applications requiring 300V operation at 7.5A current rating across a temperature range of -55°C to 125°C. The connector incorporates tin-plated steel shell construction with gold-plated machined brass contacts and is RoHS compliant with UL94 V-0 flammability rating.

Substitute parts become necessary when original inventory is depleted, when design requirements shift to alternative mounting configurations, or when legacy component sourcing becomes constrained. The substitute parts listed below provide functional equivalency within defined parameter tolerances specific to D-Sub connector technology.

Substiute Parts

L77DA15SA

Amphenol ICC (Commercial Products)In Stock: 710L77DA15SA 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 logic for D-Sub receptacle connectors is determined by strict equivalency across the following critical parameters:

Critical Parameters (Must Match Exactly):

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 15
• Shell Size, Connector Layout: 2 (DA, A)
• Mounting Type: Through Hole, Right Angle
• Termination: Solder

Important Parameters (Determine Functional Compatibility):

• Current Rating: Substitute must meet or exceed 7.5A requirement
• Voltage Rating: Substitute must meet or exceed 300V requirement
• Operating Temperature Range: Substitute must encompass or exceed -55°C to 125°C
• Contact Finish: Gold plating required for signal integrity
• Shell Material: Steel construction with protective finish
• RoHS Compliance: Required for regulatory adherence

Secondary Parameters (Affect Application Suitability):

• Backset Spacing: Variations affect connector depth and PCB clearance
• Flange Feature: Mounting bracket configuration
• Dielectric Material: Thermoplastic or polyamide construction
• Contact Material: Brass or copper alloy

The substitute parts listed below maintain equivalency across critical parameters while presenting variations in secondary parameters that may affect specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: DA15S564GTLF (Amphenol ICC)

The DA15S564GTLF is the preferred substitute for the L77DA15SA. Both parts are manufactured by Amphenol ICC, share identical connector type, position count, shell size, mounting configuration, and termination method. Both parts are RoHS compliant and active in production status. Operating temperature ranges are identical (-55°C to 125°C), and voltage rating matches at 300V. The DA15S564GTLF incorporates GXT™ gold contact finish technology and copper alloy contact material. The primary difference is backset spacing (0.409" versus 0.319"), which affects connector depth. Current rating specification differs (5A per contact versus 7.5A), requiring verification that application current requirements do not exceed 5A per contact. This part is suitable for applications where the increased backset spacing does not create PCB clearance conflicts.

Secondary Recommendations: 173-E15-211R141, 173-E15-211R241, 174-E15-211R141 (NorComp)

The NorComp parts (173-E15 and 174-E15 series) maintain critical parameter equivalency across connector type, position count, shell size, mounting configuration, and termination. All three parts feature gold-plated contacts and steel construction. However, these parts present significant limitations:

1. Product Status: All three NorComp parts are obsolete, indicating discontinued production and potential long-term sourcing constraints.

2. RoHS Compliance: All three NorComp parts are RoHS non-compliant, which disqualifies them from applications subject to RoHS regulatory requirements (EU Directive 2011/65/EU and amendments).

3. Operating Temperature: NorComp parts operate within -50°C to 100°C range, which does not encompass the full -55°C to 125°C specification of the L77DA15SA. Applications requiring operation at -55°C or above 100°C cannot use these substitutes.

4. Current Rating: All NorComp parts are rated at 5A, below the 7.5A specification of the L77DA15SA. Applications requiring sustained current above 5A cannot use these substitutes.

5. Voltage Rating: Voltage rating is not specified for NorComp parts, creating uncertainty for applications with defined voltage requirements.

6. Backset Spacing: NorComp parts present variations in backset spacing (0.283" for 173-E15 series, 0.370" for 174-E15 series), affecting PCB layout compatibility.

NorComp substitutes are suitable only for legacy applications where RoHS compliance is not required, operating temperature does not exceed 100°C, current requirements do not exceed 5A, and backset spacing variations are accommodated in PCB design.

Frequently Asked Questions (FAQ)

Q: Can the DA15S564GTLF directly replace the L77DA15SA without PCB modification?

A: The DA15S564GTLF maintains functional equivalency across critical parameters (connector type, position count, shell size, mounting configuration, termination). However, backset spacing differs (0.409" versus 0.319"), which affects connector depth. PCB layout must be verified to confirm adequate clearance for the increased depth. If the original PCB design accommodates 0.409" backset spacing, direct substitution is possible. If not, PCB modification is required.

Q: Are the NorComp parts (173-E15-211R141, 173-E15-211R241, 174-E15-211R141) suitable for new product designs?

A: No. All three NorComp parts are obsolete and RoHS non-compliant. New product designs must use RoHS-compliant parts. The L77DA15SA or DA15S564GTLF are the appropriate choices for new designs. NorComp parts are suitable only for legacy product support where RoHS compliance is not mandated and existing inventory is available.

Q: What is the significance of the current rating difference between L77DA15SA (7.5A) and substitute parts (5A)?

A: Current rating specifies the maximum continuous current each contact can safely carry without exceeding temperature limits. The L77DA15SA is rated at 7.5A, while substitute parts are rated at 5A. If your application requires sustained current above 5A per contact, the substitute parts cannot be used. If your application operates at or below 5A per contact, the substitute parts are electrically suitable. Verify actual application current requirements before substitution.

Q: Why do the NorComp parts have different backset spacing values?

A: Backset spacing is the distance from the rear of the connector shell to the solder pins. The L77DA15SA specifies 0.319" (8.10mm), the 173-E15 series specifies 0.283" (7.20mm), and the 174-E15 series specifies 0.370" (9.40mm). These variations affect how far the connector extends from the PCB surface. PCB layout must accommodate the specific backset spacing of the selected part. Mismatched backset spacing can result in mechanical interference or inadequate solder joint formation.

Q: What does RoHS compliance mean, and why is it important?

A: RoHS (Restriction of Hazardous Substances) compliance indicates the part does not contain restricted substances including lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers above specified thresholds. RoHS compliance is mandated for products sold in the European Union and is increasingly required by manufacturers worldwide. The L77DA15SA is RoHS compliant; the NorComp parts are not. For applications subject to RoHS requirements, only RoHS-compliant parts (L77DA15SA or DA15S564GTLF) are acceptable.

Q: Can I use a substitute part with a lower operating temperature range?

A: No. The NorComp parts operate within -50°C to 100°C, while the L77DA15SA operates within -55°C to 125°C. If your application requires operation at -55°C or above 100°C, the NorComp parts cannot be used. The DA15S564GTLF maintains the full -55°C to 125°C operating range and is suitable for applications with extended temperature requirements.

Q: What is the difference between "Housing/Shell (Unthreaded)" and "Mating Side, Female Screwlock (4-40)" flange features?

A: The flange feature describes the mounting interface. "Housing/Shell (Unthreaded)" indicates the connector shell has an unthreaded flange for bracket mounting without threaded fasteners. "Mating Side, Female Screwlock (4-40)" indicates the connector has threaded inserts on the mating side for 4-40 screws, typically used for cable-side connector retention. These are different mounting approaches. The L77DA15SA and DA15S564GTLF use unthreaded housing flanges, while NorComp parts use threaded mating-side flanges. Mounting bracket compatibility must be verified when substituting.

Q: Is the contact finish thickness difference (8.00µin versus Flash) significant?

A: The L77DA15SA specifies 8.00µin (0.203µm) gold plating thickness, while substitute parts specify "Flash" thickness (typically 0.5-1.0µm). Flash plating provides corrosion protection and signal integrity for standard applications. The thicker 8.00µin plating on the L77DA15SA provides enhanced durability for high-cycle mating applications or harsh environments. For standard applications with infrequent mating cycles, flash plating is adequate. For applications with frequent mating cycles or corrosive environments, the thicker plating of the L77DA15SA is preferred.

Q: What does "GXT™" contact finish mean on the DA15S564GTLF?

A: GXT™ is a proprietary gold plating technology. The specific composition and performance characteristics are defined by Amphenol ICC. GXT™ plating provides gold contact finish with specified corrosion resistance and electrical performance. For substitution purposes, GXT™ is functionally equivalent to standard gold plating for D-Sub connector applications.