L77SDD50SVF D-Sub Receptacle Connector Equivalent & Substitute Parts

Part Overview

The L77SDD50SVF is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with solder cup termination and is designed for free-hanging, in-line mounting applications. The part is currently active in production with 913 units in stock. Alternative equivalent parts may be required due to application-specific mounting requirements, availability constraints, or design modifications that necessitate different mechanical or electrical characteristics within the D-Sub connector category.

Substiute Parts

L77SDD50SVF

Amphenol ICC (Commercial Products)In Stock: 927L77SDD50SVF Datasheet

Current PartRFQ

171-050-203L001

NorComp Inc.In Stock: 1382171-050-203L001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77SDD50SVF is determined by strict adherence to the following core parameters that define functional and mechanical compatibility:

Critical Matching Parameters:

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 50
• Number of Rows: 3
• Shell Size, Connector Layout: 5 (DD, D)
• Termination Method: Solder Cup
• Contact Type: Signal

Parameters Permitting Variation:

• Mounting Type: Free Hanging (In-Line) versus Panel Mount
• Shell Material Finish: Steel, Tin Plated versus Steel, Nickel Plated
• Current Rating: 3A versus 5A (higher rating acceptable)
• Operating Temperature Range: -55°C ~ 125°C versus -50°C ~ 100°C (narrower range acceptable for specific applications)
• Dielectric Material: Thermoplastic, Glass Filled versus Polybutylene Terephthalate (PBT), Glass Filled

The substitute part 171-050-203L001 (NorComp Inc.) maintains all critical matching parameters while differing in mounting configuration and material specifications. This substitution is valid for applications where panel mounting is acceptable and the operating temperature range of -50°C ~ 100°C is sufficient.

Parameter Comparison

Engineering Selection Recommendations

L77SDD50SVF Selection Criteria:

• Applications requiring free-hanging, in-line mounting configuration
• Operating temperature range of -55°C to 125°C
• Tin-plated steel shell finish preferred
• Current requirements up to 3A
• Active production status with established supply chain

171-050-203L001 Selection Criteria:

• Applications requiring panel mount configuration
• Operating temperature range of -50°C to 100°C is acceptable
• Nickel-plated steel shell finish acceptable
• Current requirements up to 5A
• ROHS3 compliance required
• Active production status with higher inventory availability (1306 units)

Both parts maintain active product status and full compliance with applicable environmental and safety standards (UL94 V-0, RoHS/ROHS3, EAR99 export classification). Selection between these parts is determined by mechanical mounting requirements and thermal operating envelope specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 171-050-203L001 directly replace the L77SDD50SVF in all applications?

A: Direct replacement is possible only when the application accommodates panel mounting instead of free-hanging, in-line mounting. The connector pinout, contact count, and electrical signal characteristics are identical. Mechanical mounting configuration must be evaluated for each application.

Q: What is the significance of the different operating temperature ranges?

A: The L77SDD50SVF operates from -55°C to 125°C, while the 171-050-203L001 operates from -50°C to 100°C. Applications requiring operation below -50°C or above 100°C must use the L77SDD50SVF. Applications within the -50°C to 100°C range can use either part.

Q: Are there differences in current-carrying capacity between these parts?

A: The L77SDD50SVF is rated for 3A, while the 171-050-203L001 is rated for 5A. The 171-050-203L001 can be used in applications requiring up to 5A. The L77SDD50SVF must be used when current is limited to 3A or when the higher current rating of the substitute is not required.

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

A: The L77SDD50SVF features a tin-plated steel shell, while the 171-050-203L001 features a nickel-plated steel shell. Both finishes provide corrosion resistance. Material selection depends on environmental exposure and specific application requirements for shell conductivity and durability.

Q: Are both parts RoHS compliant?

A: Yes. The L77SDD50SVF is RoHS Compliant, and the 171-050-203L001 is ROHS3 Compliant. Both meet current environmental compliance standards for electronic components.

Q: What is the difference in dielectric material between these connectors?

A: The L77SDD50SVF uses Thermoplastic, Glass Filled dielectric material, while the 171-050-203L001 uses Polybutylene Terephthalate (PBT), Glass Filled. Both materials are glass-filled polymers suitable for D-Sub connector applications. PBT offers enhanced chemical resistance and dimensional stability.

Q: Can I use the 171-050-203L001 if my application requires a 250V voltage rating?

A: The 171-050-203L001 does not specify a voltage rating in the provided data. The L77SDD50SVF is rated for 250V. Applications with explicit 250V requirements should use the L77SDD50SVF to ensure rated voltage compliance.

Q: What is the inventory status for these parts?

A: The L77SDD50SVF has 913 units in stock. The 171-050-203L001 has 1306 units in stock. Both parts are in active production and available for immediate procurement.