L77DFA15SAM4B D-Sub 15-Position Receptacle Connector

Part Overview

The L77DFA15SAM4B is a 15-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This D-shaped connector features female sockets in a 2-row configuration with right-angle solder termination, designed for panel mount and through-hole applications. The part is currently in active production status with 654 units in stock inventory.

Due to manufacturing discontinuation of certain equivalent models and varying compliance requirements across different applications, alternative D-Sub 15-position receptacle connectors may be required for new designs or maintenance applications. The following substitute parts maintain functional compatibility based on core electrical and mechanical parameters.

Substiute Parts

L77DFA15SAM4B

Amphenol ICC (Commercial Products)In Stock: 691L77DFA15SAM4B Datasheet

Current PartRFQ

173-E15-211R141

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

SimilarRFQ

173-E15-211R241

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

SimilarRFQ

174-E15-211R141

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

SimilarRFQ

DA15S564GTLF

Amphenol ICC (FCI)In Stock: 1213DA15S564GTLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

D-Sub 15-position receptacle connectors are substitutable when the following core parameters remain consistent:

Fixed Parameters (Must Match):

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 15
• Number of Rows: 2
• Shell Size: 2 (DA, A)
• Termination Method: Solder
• Connector Style: D-Sub, Right Angle

Variable Parameters (Allowed Variation):

• Current Rating: Must meet or exceed application requirements
• Voltage Rating: Must meet or exceed application requirements
• Operating Temperature Range: Must encompass application requirements
• Contact Finish Composition and Thickness: Both gold finishes acceptable
• Shell Material Finish: Steel with tin or chromate plating acceptable
• Flange Feature: Housing/Shell (unthreaded) or mating side screwlock/standard screw configurations acceptable
• Backset Spacing: Variations allowable if mechanical installation tolerances accommodate
• Dielectric Material: Thermoplastic or Polyamide (nylon) acceptable
• Manufacturing Status: Active or obsolete status does not affect electrical/mechanical compatibility

The four substitute parts listed below maintain all fixed parameters while introducing variations in current rating, operating temperature range, contact finish type, shell material finish, and production status.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L77DFA15SAM4B or DA15S564GTLF

Both parts are currently in active production status with RoHS compliance certification. The L77DFA15SAM4B provides a higher current rating (7.5A) and extended upper operating temperature limit (155°C), making it suitable for applications requiring higher thermal margins. The DA15S564GTLF provides RoHS compliance with an enhanced gold contact finish (GXT™) and board lock features.

Secondary Selection: NorComp 173-E15 or 174-E15 Series

The NorComp substitute parts (173-E15-211R141, 173-E15-211R241, 174-E15-211R141) are obsolete products with reduced current ratings (5A) and restricted operating temperature ranges (-50°C to 100°C). These parts are not RoHS compliant. Selection of NorComp parts is limited to legacy system maintenance where existing circuit designs operate within the reduced parameter specifications and RoHS compliance is not required.

Compatibility Considerations by Application Type:

For new designs and RoHS-regulated applications: Select L77DFA15SAM4B or DA15S564GTLF.

For high-temperature applications exceeding 125°C: Select L77DFA15SAM4B only.

For applications with current requirements below 5A and operating temperatures below 100°C: All five parts are electrically compatible.

For mechanical panel mount configurations: L77DFA15SAM4B and DA15S564GTLF both provide unthreaded housing flanges suitable for standard panel mounting. NorComp parts feature mating-side screwlock or standard screw flanges requiring different installation hardware.

Frequently Asked Questions (FAQ)

Q: Can these substitute parts be used interchangeably in existing designs?

A: D-Sub receptacle connectors with matching pin counts (15), row configurations (2), and shell sizes (DA, A) are mechanically interchangeable at the connector level. However, circuit designs must verify that the substitute part's current rating and operating temperature range are adequate for the specific application. Backset spacing variations may affect panel cutout requirements.

Q: What is backset spacing and how does it affect substitution?

A: Backset spacing is the distance from the back edge of the connector shell to the solder cup termination points. The main part specifies 0.590" (14.99mm), while substitutes range from 0.283" to 0.409". If the design includes rigid PCB-to-connector mounting hardware with fixed spacing tolerances, backset variation may require mechanical re-qualification.

Q: Are RoHS-compliant connectors compatible with non-compliant designs?

A: RoHS compliance is a manufacturing and supply chain certification reflecting restricted hazardous substance limits. From an electrical and mechanical standpoint, RoHS-compliant parts (L77DFA15SAM4B, DA15S564GTLF) function identically to non-compliant alternatives. However, RoHS-regulated applications and jurisdictions must use RoHS-certified parts regardless of technical function.

Q: What is the difference between tin-plated and chromate-plated shell finishes?

A: Both tin and yellow chromate plating provide corrosion protection on steel shells with similar electrical properties. Tin plating is preferred for RoHS compliance and long-term storage. Chromate plating offers traditional corrosion protection but is restricted in RoHS-regulated applications. Selection depends on storage conditions, environmental exposure, and regulatory requirements.

Q: Does gold contact finish thickness affect electrical performance?

A: Contact finish thickness (20.0µin versus flash) does not alter electrical contact resistance or signal integrity for signal-level D-Sub applications. Both finishes provide equivalent gold contact surface properties. Finish thickness variation becomes relevant only in applications requiring extended contact wear cycles or high-frequency performance above connector design ratings.

Q: What is the significance of the GXT™ contact finish on the DA15S564GTLF?

A: GXT™ is an enhanced gold finish technology applied by Amphenol ICC (FCI). It provides improved corrosion resistance and contact reliability compared to standard flash gold finishes. This enhancement does not change electrical specifications but increases reliability margins for high-reliability applications.

Q: Can the 5A-rated NorComp connectors be used in 7.5A applications?

A: No. The L77DFA15SAM4B is rated for 7.5A continuous current per contact. NorComp substitute parts are rated for 5A per contact. Using a 5A connector in a 7.5A application exceeds the connector's current-carrying capacity and creates thermal and reliability risks.

Q: Why are some parts listed as obsolete if they are functionally similar?

A: Obsolete product status indicates that the manufacturer has discontinued production and removed the part from active inventory. While obsolete parts may function identically to active alternatives, procurement becomes unreliable, inventory availability diminishes over time, and design refresh to active parts is recommended for new products and long-term system support.

Q: Are there packaging differences between these connectors?

A: The L77DFA15SAM4B is supplied in tray packaging. The DA15S564GTLF is supplied in bulk packaging. NorComp parts are supplied in tray packaging. Packaging affects handling, storage, and quantity ordering but does not affect connector function or performance.