L77DFD50SU D-Sub 50 Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The L77DFD50SU is a 50 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel mount, solder termination connector features female sockets in a 3-row configuration with shell size 5 (DD, D) layout. The connector is actively produced and maintains RoHS compliance with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified for applications requiring alternative mounting configurations, compliance certifications, or inventory availability.

Substiute Parts

L77DFD50SU

Amphenol ICC (Commercial Products)In Stock: 661L77DFD50SU 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 of D-Sub 50 position receptacle connectors is determined by the following critical parameters: connector type (receptacle, female sockets), number of positions (50), number of rows (3), shell size (5 DD/D), termination method (solder), and contact finish (gold). All identified substitute parts match these core specifications.

Secondary parameters that may vary between the main part and substitutes include mounting type, current rating, voltage rating, operating temperature range, contact finish thickness, shell material finish, contact material composition, and regulatory compliance status. These variations establish distinct substitution categories based on application requirements.

The substitute parts identified are:

TE Connectivity AMP Connectors 5745080-4 and 5745080-6: Through hole mounting (non-panel mount), lower current rating (6A vs 7.5A), lower voltage rating (125V vs 300V), narrower operating temperature range (-55°C to 105°C vs -55°C to 155°C), and ROHS3 compliance with REACH affected status.

Amphenol ICC (FCI) DDM50S332N: Through hole mounting (non-panel mount), matching current rating (7.5A), matching voltage rating (300V), narrower operating temperature range (-55°C to 125°C vs -55°C to 155°C), higher contact finish thickness (50.0µin vs 20.0µin), RoHS non-compliant status, and REACH affected status.

Parameter Comparison

Engineering Selection Recommendations

L77DFD50SU Selection: Select this part for applications requiring panel mount configuration with solder termination. This connector is suitable for systems operating at 300V with current demands up to 7.5A and extended temperature ranges to 155°C. RoHS compliance is maintained. This part is actively produced with 648 units in stock.

5745080-4 and 5745080-6 Selection: These TE Connectivity AMPLIMITE HD-20 series connectors are suitable for through hole mounting applications where panel mount is not required. These parts are appropriate for systems operating at 125V with current demands up to 6A and operating temperatures to 105°C. ROHS3 compliance is maintained. Both parts are actively produced with 1425 and 1166 units in stock respectively. These substitutes are not suitable for applications requiring 300V operation or extended temperature ranges above 105°C.

DDM50S332N Selection: This Amphenol ICC (FCI) DMW HE507 series connector is suitable for through hole mounting applications where panel mount is not required. This part maintains 300V and 7.5A ratings matching the main part, with operating temperature to 125°C. This connector features increased contact finish thickness (50.0µin). RoHS non-compliance and REACH affected status apply. This part is actively produced with 827 units in stock. This substitute is not suitable for applications requiring RoHS compliance or operating temperatures above 125°C.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 5745080-4 or 5745080-6 be used as a direct replacement for the L77DFD50SU in all applications?

A: No. While these connectors share the same 50 position, 3-row, shell size 5 configuration and solder termination, they differ in critical electrical parameters. The TE Connectivity parts are rated for 125V maximum versus 300V for the L77DFD50SU, and support only 6A current versus 7.5A. Operating temperature range is limited to 105°C versus 155°C. These substitutes are suitable only for applications within their specified electrical and thermal limits.

Q: What is the primary difference between the L77DFD50SU and the DDM50S332N?

A: The primary difference is mounting type. The L77DFD50SU is panel mount with through hole termination, while the DDM50S332N is through hole only. Both maintain 300V and 7.5A ratings. The DDM50S332N features thicker gold plating (50.0µin versus 20.0µin) and operates to 125°C versus 155°C. The DDM50S332N is RoHS non-compliant, whereas the L77DFD50SU is RoHS compliant.

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

A: Yes. Both parts are from the same AMPLIMITE HD-20 series with identical electrical specifications, operating temperature range, and compliance status. The difference is packaging: 5745080-4 and 5745080-6 are supplied in tube packaging. Both are suitable for the same applications.

Q: What packaging formats are available for these D-Sub 50 position receptors?

A: The L77DFD50SU is supplied in tray packaging. The TE Connectivity parts (5745080-4 and 5745080-6) are supplied in tube packaging. The DDM50S332N is supplied in bulk packaging. Packaging selection may affect procurement, storage, and handling procedures.

Q: Can the DDM50S332N be used in applications requiring RoHS compliance?

A: No. The DDM50S332N is RoHS non-compliant and REACH affected. Applications requiring RoHS compliance must use the L77DFD50SU or the TE Connectivity 5745080-4 or 5745080-6 (ROHS3 compliant).

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

A: Contact finish thickness affects contact durability and wear resistance. The L77DFD50SU has 20.0µin gold plating, the TE Connectivity parts have 30.0µin, and the DDM50S332N has 50.0µin. Thicker plating provides increased durability in high-cycle mating applications. Selection depends on application mating cycle requirements and cost considerations.

Q: Are all these connectors suitable for high-temperature applications above 125°C?

A: No. Only the L77DFD50SU supports continuous operation to 155°C. The DDM50S332N operates to 125°C, and the TE Connectivity parts operate to 105°C. Applications requiring operation above 125°C must use the L77DFD50SU.