L77DFD50SOL2 Equivalent & Substitute Parts

Part Overview

The L77DFD50SOL2 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 with RoHS compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified for applications where alternative mounting configurations, compliance requirements, or inventory availability necessitate component alternatives while maintaining functional compatibility.

Substiute Parts

L77DFD50SOL2

Amphenol ICC (Commercial Products)In Stock: 858L77DFD50SOL2 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

Substitution eligibility for the L77DFD50SOL2 is determined by the following core parameters: 50-position configuration, 3-row layout, shell size 5 (DD, D), receptacle female socket type, solder termination, signal contact classification, and UL94 V-0 flammability rating. All identified substitute parts meet these baseline requirements.

The substitute parts are grouped into two categories based on operational parameter alignment:

Category A - Full Parameter Alignment (DDM50S332N): This substitute maintains identical voltage rating (300V), current rating (7.5A per contact), and operating temperature range (-55°C to 125°C). The DDM50S332N differs in shell material finish (steel, yellow cadmium plated versus steel, tin plated) and contact material (phosphor bronze versus copper alloy). RoHS non-compliance status represents a critical distinction for applications requiring RoHS-compliant components.

Category B - Reduced Parameter Alignment (5745080-4, 5745080-6): These TE Connectivity AMPLIMITE HD-20 series substitutes operate at reduced voltage (125V versus 300V) and current (6A versus 7.5A) ratings with a narrower operating temperature range (-55°C to 105°C versus -55°C to 125°C). Both parts feature female screwlock mating-side flanges and polyester dielectric material. These substitutes are suitable only for applications with electrical specifications within their reduced parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

DDM50S332N Selection Criteria: The DDM50S332N substitute is appropriate for applications requiring full electrical parameter equivalence (300V, 7.5A, -55°C to 125°C operation). This part maintains identical voltage and current ratings with matching temperature range. Selection of this substitute is contingent upon acceptance of RoHS non-compliance status and compatibility with yellow cadmium-plated steel shell material. The increased contact finish thickness (50.0µin versus 20.0µin) provides enhanced wear resistance in high-cycle mating applications. This substitute is suitable for legacy system designs or applications where RoHS compliance is not mandated.

5745080-4 and 5745080-6 Selection Criteria: These TE Connectivity AMPLIMITE HD-20 series substitutes are appropriate exclusively for applications with electrical specifications within their reduced parameter envelope: maximum 125V operation, maximum 6A current, and maximum 105°C operating temperature. Both parts are ROHS3 compliant, satisfying regulatory requirements for RoHS-affected applications. The female screwlock mating-side flange provides enhanced connector retention compared to the unthreaded housing of the main part. These substitutes are not suitable for applications requiring the full 300V or 7.5A specifications of the L77DFD50SOL2.

Mounting Configuration Consideration: The L77DFD50SOL2 features panel mount capability with through-hole termination. The DDM50S332N and both 5745080 variants support through-hole mounting only without panel mount flange. Applications requiring panel-mount configuration must retain the L77DFD50SOL2.

Frequently Asked Questions (FAQ)

Q: Can the DDM50S332N be used as a direct replacement for the L77DFD50SOL2?

A: The DDM50S332N is electrically equivalent with identical voltage (300V), current (7.5A), and temperature (-55°C to 125°C) ratings. However, it is RoHS non-compliant and features yellow cadmium-plated steel shell material versus tin-plated steel. Direct substitution is permissible only in applications where RoHS compliance is not required and cadmium plating is acceptable.

Q: What are the limitations of the 5745080-4 and 5745080-6 substitutes?

A: Both 5745080 variants operate at reduced electrical specifications: 125V maximum voltage (versus 300V), 6A maximum current (versus 7.5A), and 105°C maximum temperature (versus 125°C). These parts are suitable only for applications with electrical requirements within these reduced parameters. Applications requiring full 300V/7.5A operation cannot use these substitutes.

Q: Are the 5745080-4 and 5745080-6 interchangeable with each other?

A: Yes. Both parts are identical in electrical and mechanical specifications, differing only in packaging (tube) and base product number designation. Selection between these two variants is determined by inventory availability and packaging requirements.

Q: How does the contact finish thickness affect connector performance?

A: Contact finish thickness influences wear resistance and mating cycle durability. The DDM50S332N provides 50.0µin thickness compared to 20.0µin on the L77DFD50SOL2, offering enhanced protection in high-cycle mating environments. The 5745080 variants provide intermediate thickness at 30.0µin. Thicker finishes extend connector service life in applications with frequent connection/disconnection cycles.

Q: What is the significance of the flange feature differences?

A: The L77DFD50SOL2 features an unthreaded housing/shell flange suitable for panel mounting. The 5745080-4 and 5745080-6 feature female screwlock (4-40) mating-side flanges, providing mechanical retention through threaded coupling. The DDM50S332N features an unthreaded housing/shell flange matching the main part. Flange type selection depends on application mechanical requirements and mating connector specifications.

Q: Can these substitutes be used in applications requiring RoHS compliance?

A: The L77DFD50SOL2 and both 5745080 variants (5745080-4, 5745080-6) are RoHS compliant or ROHS3 compliant. The DDM50S332N is RoHS non-compliant and cannot be used in applications with RoHS compliance mandates. Verify regulatory requirements before selecting the DDM50S332N.

Q: What dielectric material differences exist among these parts?

A: The L77DFD50SOL2 uses thermoplastic, glass-filled dielectric material. The DDM50S332N uses thermoplastic dielectric material without glass filling. The 5745080 variants use polyester dielectric material. These material differences may affect electrical performance in high-frequency or high-voltage applications; verify dielectric specifications against application requirements.