L77DFD50SOL2RM8 Equivalent & Substitute Parts

Part Overview

The L77DFD50SOL2RM8 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel-mount, through-hole solder-terminated connector features female sockets in a 3-row configuration with shell size 5 (DD, D) layout. The connector is designed for signal applications and is currently in active production status with 637 units in stock. Alternative equivalent parts are necessary to support supply chain flexibility, extended lead time management, and application-specific requirements such as mounting orientation or flange configuration preferences.

Substiute Parts

L77DFD50SOL2RM8

Amphenol ICC (Commercial Products)In Stock: 744L77DFD50SOL2RM8 Datasheet

Current PartRFQ

5745080-4

TE Connectivity AMP ConnectorsIn Stock: 15255745080-4 Datasheet

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5745080-6

TE Connectivity AMP ConnectorsIn Stock: 12025745080-6 Datasheet

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DDM50S332N

Amphenol ICC (FCI)In Stock: 871DDM50S332N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L77DFD50SOL2RM8 is determined by the following critical parameters:

Core Compatibility Requirements:

• Connector style: D-Sub
• Connector type: Receptacle, Female Sockets
• Number of positions: 50
• Number of rows: 3
• Shell size: 5 (DD, D)
• Termination method: Solder
• Contact type: Signal

Performance Envelope Parameters:

• Voltage rating: 300V minimum
• Current rating: 7.5A minimum per contact
• Operating temperature range: -55°C to 155°C minimum
• Material flammability: UL94 V-0

Compliance Requirements:

• RoHS compliance status
• Moisture sensitivity level: 1 (Unlimited)

The substitute parts identified (5745080-4, 5745080-6, and DDM50S332N) share the core D-Sub receptacle configuration with 50 positions in 3 rows and shell size 5 layout. However, each substitute exhibits variations in mounting orientation, flange design, shell material finish, contact material composition, and performance ratings that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

L77DFD50SOL2RM8 (Primary Part)

The L77DFD50SOL2RM8 remains the optimal selection for applications requiring the full specified performance envelope. This connector delivers 7.5A current rating and 300V voltage rating with an operating temperature range of -55°C to 155°C. The part is RoHS compliant and maintains active production status. The panel-mount configuration with unthreaded housing/shell flange is suitable for direct panel integration. Copper alloy contacts with 20.0µin gold plating provide reliable signal transmission. Glass-filled thermoplastic dielectric material ensures structural integrity across the full temperature range.

DDM50S332N (Preferred Substitute)

The DDM50S332N from Amphenol ICC (FCI) is the preferred substitute when supply constraints affect L77DFD50SOL2RM8 availability. This connector matches the primary part in voltage rating (300V) and current rating (7.5A per contact), supporting identical electrical performance. The operating temperature range extends to -55°C to 125°C, which covers most industrial applications within the primary part's envelope. The unthreaded housing/shell flange configuration aligns with the primary part's panel-mount design. The connector maintains UL94 V-0 flammability rating and unlimited moisture sensitivity level. However, DDM50S332N is RoHS non-compliant and features yellow cadmium-plated steel shell material, requiring verification against regulatory requirements for the target application. Contact finish thickness of 50.0µin (1.27µm) exceeds the primary part specification, providing enhanced contact durability.

5745080-4 and 5745080-6 (Limited Substitution)

The TE Connectivity AMPLIMITE HD-20 series connectors (5745080-4 and 5745080-6) are functionally equivalent in core D-Sub receptacle configuration but exhibit reduced electrical performance ratings. Both parts are limited to 6A current rating and 125V voltage rating, representing significant derating compared to the primary part's 7.5A and 300V specifications. The operating temperature range is restricted to -55°C to 105°C, limiting suitability for high-temperature applications. These connectors feature female screwlock flanges (4-40) on the mating side rather than unthreaded housing flanges, requiring different mechanical integration approaches. Both parts are ROHS3 compliant and maintain active production status with higher inventory availability (1425 and 1166 units respectively). These substitutes are suitable only for applications where the reduced voltage and current ratings are acceptable and where the mating-side screwlock flange configuration is compatible with the system design.

Frequently Asked Questions (FAQ)

Q: Can the 5745080-4 or 5745080-6 be used as direct replacements for the L77DFD50SOL2RM8?

A: The 5745080-4 and 5745080-6 share the same 50-position, 3-row D-Sub receptacle configuration but are not direct replacements. These TE Connectivity connectors are rated for 6A at 125V with an operating temperature range of -55°C to 105°C, compared to the L77DFD50SOL2RM8's 7.5A at 300V with -55°C to 155°C range. Applications requiring the full electrical performance or extended temperature range of the primary part cannot use these substitutes. Additionally, the mating-side female screwlock flange differs from the primary part's unthreaded housing flange, requiring mechanical redesign.

Q: Is the DDM50S332N a suitable substitute for high-temperature applications?

A: The DDM50S332N supports operating temperatures from -55°C to 125°C, which is 30°C below the L77DFD50SOL2RM8's maximum of 155°C. Applications requiring sustained operation above 125°C must use the primary part. For applications with maximum operating temperatures at or below 125°C, the DDM50S332N provides equivalent electrical performance with 7.5A current rating and 300V voltage rating.

Q: What are the compliance differences between these connectors?

A: The L77DFD50SOL2RM8 and both 5745080 variants are RoHS compliant (RoHS and ROHS3 respectively), suitable for applications with RoHS regulatory requirements. The DDM50S332N is RoHS non-compliant and features yellow cadmium-plated shell material, which may be restricted in certain jurisdictions or applications. Verify regulatory compliance requirements before selecting DDM50S332N as a substitute.

Q: How do the contact finish specifications differ?

A: The L77DFD50SOL2RM8 features 20.0µin (0.51µm) gold contact finish. The 5745080-4 and 5745080-6 provide 30.0µin (0.76µm) gold finish, while the DDM50S332N offers 50.0µin (1.27µm) gold finish. Thicker gold plating provides enhanced contact durability and corrosion resistance, particularly beneficial in harsh environments or high-cycle mating applications.

Q: What is the difference between the flange configurations?

A: The L77DFD50SOL2RM8 features an unthreaded housing/shell flange suitable for direct panel mounting without additional fastening hardware. The 5745080-4 and 5745080-6 feature female screwlock flanges (4-40) on the mating side, requiring mating connectors with corresponding male screwlock pins for secure mechanical coupling. The DDM50S332N matches the primary part with an unthreaded housing/shell flange. Flange configuration affects mechanical integration and must be verified against mating connector specifications.

Q: Are all these connectors suitable for solder termination?

A: Yes, all four connectors (L77DFD50SOL2RM8, 5745080-4, 5745080-6, and DDM50S332N) are solder-terminated receptacles. They are compatible with standard PCB solder assembly processes and do not require crimp or wire-wrap termination methods.

Q: What dielectric materials are used in these connectors?

A: The L77DFD50SOL2RM8 uses thermoplastic with glass filler, providing enhanced mechanical strength and thermal stability. The 5745080-4 and 5745080-6 use polyester dielectric material. The DDM50S332N uses thermoplastic without specified filler. Glass-filled thermoplastic offers superior performance in high-temperature and high-stress applications.

Q: Which substitute has the best inventory availability?

A: The 5745080-4 has the highest inventory with 1425 units in stock, followed by 5745080-6 with 1166 units and DDM50S332N with 827 units. The primary part L77DFD50SOL2RM8 has 637 units available. Inventory levels should be considered in conjunction with electrical performance and compliance requirements when selecting substitutes.