L77DFDF50SOL2 Equivalent & Substitute Parts

Part Overview

The L77DFDF50SOL2 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel-mount, 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 requiring 300V operation and 7.5A current capacity across an operating temperature range of -55°C to 125°C. The part maintains active product status and is RoHS compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified to address inventory availability, specific application requirements, or procurement preferences while maintaining functional compatibility within the D-Sub receptacle connector category.

Substiute Parts

L77DFDF50SOL2

Amphenol ICC (Commercial Products)In Stock: 900L77DFDF50SOL2 Datasheet

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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

Substitute parts for the L77DFDF50SOL2 are identified based on strict alignment with core electrical and mechanical parameters. All substitute candidates share the following mandatory characteristics:

Core Compatibility Parameters:

• Connector type: Receptacle, Female Sockets
• Position count: 50
• Row configuration: 3 rows
• Shell size and layout: 5 (DD, D)
• Termination method: Solder
• Contact finish: Gold
• Material flammability: UL94 V-0
• Connector style: D-Sub

Substitutes are grouped into two categories based on parameter alignment:

Category A (High Compatibility): Parts meeting all core parameters with minor variations in mounting configuration or contact material specifications.

Category B (Functional Equivalence): Parts meeting all core parameters with notable differences in voltage rating, current capacity, or operating temperature range that may affect application suitability.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring 300V and 7.5A specifications:

The DDM50S332N provides full electrical equivalence to the L77DFDF50SOL2, matching both voltage and current ratings across the identical operating temperature range. Both parts feature UL94 V-0 flammability rating and unlimited moisture sensitivity. The DDM50S332N offers increased contact finish thickness (50.0µin versus 20.0µin), which may provide enhanced durability in high-cycle mating applications. However, the DDM50S332N carries RoHS non-compliant status and REACH-affected designation, requiring verification against regulatory requirements for the target application.

For applications with reduced voltage and current requirements:

The TE Connectivity parts 5745080-4 and 5745080-6 are functionally equivalent for applications operating at 125V and 6A or lower. Both parts maintain the same 50-position, 3-row configuration with solder termination and gold contact finish. These parts are ROHS3 compliant and feature phosphor bronze contact material. The reduced operating temperature maximum of 105°C versus 125°C must be evaluated against application thermal requirements. Both parts are available in higher inventory quantities (1425 and 1166 units respectively) compared to the main part (890 units).

For panel-mount applications:

The L77DFDF50SOL2 is the only part in this group explicitly specified for panel-mount configuration. The substitute parts are specified for through-hole mounting without panel-mount designation. Applications requiring panel-mount functionality should retain the L77DFDF50SOL2 unless mechanical redesign is feasible.

Compliance considerations:

Applications subject to RoHS compliance requirements should utilize L77DFDF50SOL2 or the TE Connectivity parts (5745080-4, 5745080-6). The DDM50S332N is not suitable for RoHS-regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 5745080-4 or 5745080-6 be used as direct replacements for the L77DFDF50SOL2?

A: These parts share the core D-Sub receptacle configuration (50 positions, 3 rows, shell size 5, solder termination, gold contact finish, UL94 V-0 rating). However, they differ in voltage rating (125V versus 300V), current capacity (6A versus 7.5A), and maximum operating temperature (105°C versus 125°C). Substitution is valid only for applications operating within the reduced electrical and thermal specifications of the TE Connectivity parts.

Q: What is the significance of the contact finish thickness differences?

A: Contact finish thickness affects contact durability and wear resistance. The L77DFDF50SOL2 specifies 20.0µin (0.51µm), while the TE Connectivity parts specify 30.0µin (0.76µm), and the DDM50S332N specifies 50.0µin (1.27µm). Thicker finishes provide extended service life in high-cycle mating applications. Thinner finishes are acceptable for applications with limited mating cycles or where cost optimization is prioritized.

Q: Are the TE Connectivity parts (5745080-4 and 5745080-6) interchangeable with each other?

A: Yes. Both parts are from the same AMPLIMITE HD-20 series, share identical electrical specifications, and differ only in packaging (both supplied in tubes) and base product number designation. They are functionally equivalent for all applications.

Q: What mounting differences exist between the L77DFDF50SOL2 and the substitute parts?

A: The L77DFDF50SOL2 is specified for panel-mount, through-hole configuration. The TE Connectivity parts (5745080-4, 5745080-6) are specified for through-hole mounting only, without panel-mount designation. The DDM50S332N is specified for through-hole mounting only. Applications requiring panel-mount functionality must verify mechanical compatibility before substitution.

Q: How do RoHS compliance statuses affect part selection?

A: The L77DFDF50SOL2 is RoHS compliant. The TE Connectivity parts (5745080-4, 5745080-6) are ROHS3 compliant. The DDM50S332N is RoHS non-compliant. Applications subject to RoHS regulations (EU Directive 2011/65/EU or equivalent) must use compliant parts. The DDM50S332N is restricted to applications without RoHS compliance requirements.

Q: What is the difference between the L77DFDF50SOL2 and DDM50S332N in terms of electrical performance?

A: Both parts are rated for 300V and 7.5A operation across -55°C to 125°C. The DDM50S332N specifies current rating as 7.5A per contact, while the L77DFDF50SOL2 specifies 7.5A without per-contact designation. Both parts meet the same electrical performance envelope for standard D-Sub applications. The DDM50S332N offers thicker gold plating (50.0µin versus 20.0µin), which may provide enhanced contact reliability in demanding environments.

Q: Can inventory availability influence part selection?

A: Yes. The L77DFDF50SOL2 has 890 units in stock. The TE Connectivity parts have higher availability (1425 and 1166 units respectively). The DDM50S332N has 827 units in stock. For applications with extended lead time sensitivity, the TE Connectivity parts offer superior inventory position. However, inventory availability must not override electrical, thermal, or compliance requirements.

Q: What contact material differences exist, and do they affect performance?

A: The L77DFDF50SOL2 uses copper alloy contacts. The TE Connectivity parts and DDM50S332N use phosphor bronze contacts. Both materials are standard for D-Sub connectors and provide equivalent electrical performance. Phosphor bronze offers slightly enhanced spring characteristics and wear resistance. Material selection does not affect substitution validity for standard applications.