L77DD50SAM4 Equivalent & Substitute Parts

Part Overview

The L77DD50SAM4 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This female socket connector features right-angle solder termination and is designed for through-hole mounting applications. The connector is currently in active production status with 693 pieces available in inventory.

D-Sub connectors of this configuration are essential in applications requiring high-density signal transmission with standardized mechanical and electrical interfaces. Substitute parts become necessary when addressing supply chain constraints, specific manufacturing requirements, or when alternative connector series better suit application-specific mounting or environmental conditions.

Substiute Parts

L77DD50SAM4

Amphenol ICC (Commercial Products)In Stock: 760L77DD50SAM4 Datasheet

Current PartRFQ

174-E50-213R001

NorComp Inc.In Stock: 1689174-E50-213R001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L77DD50SAM4 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Connector type: Receptacle, Female Sockets
• Number of positions: 50
• Number of rows: 3
• Shell size: 5 (DD, D)
• Mounting type: Through Hole, Right Angle
• Termination method: Solder
• Contact material: Brass
• Contact finish: Gold

Allowable Variation Parameters:

• Shell material finish (Tin Plated vs. Nickel Plated)
• Contact finish thickness (8.00µin vs. Flash)
• Backset spacing (within mechanical tolerance)
• Dielectric material composition
• Operating temperature range (substitute may have narrower range)
• Current rating (substitute may have lower rating)
• Flange feature configuration
• Color

The substitute part 174-E50-213R001 from NorComp Inc. meets all mandatory matching parameters and is therefore classified as a direct functional equivalent for this application category.

Parameter Comparison

Engineering Selection Recommendations

L77DD50SAM4 (Amphenol ICC) is the primary specification part. Selection of this connector is appropriate when:

• The application requires the full operating temperature range of -55°C to 125°C
• The application demands a current rating of 7.5A
• The specified voltage rating of 300V is a design requirement
• Tin-plated steel shell finish is required for corrosion resistance in specific environments
• The glass-filled thermoplastic dielectric material is specified

174-E50-213R001 (NorComp Inc.) is a functional substitute. Selection of this connector is appropriate when:

• Supply availability of the primary part is constrained
• The application operates within the narrower temperature range of -50°C to 100°C
• The application current requirement does not exceed 5A
• Panel mount capability provides additional mechanical flexibility
• Nickel-plated steel shell finish meets environmental requirements
• Polyamide (PA6T) dielectric material is acceptable

Both parts carry active product status and meet RoHS compliance requirements. The NorComp part carries ROHS3 compliance designation and is REACH Unaffected. Both parts are classified under ECCN EAR99 and HTSUS 8536.69.4040.

Frequently Asked Questions (FAQ)

Q: Can the 174-E50-213R001 be used as a direct replacement for the L77DD50SAM4 in all applications?

A: The 174-E50-213R001 is a functional equivalent for applications within its specified operating parameters. However, applications requiring the full -55°C to 125°C temperature range, 7.5A current capacity, or 300V voltage rating must use the L77DD50SAM4. The backset spacing difference (0.319" vs. 0.370") must be evaluated for mechanical fit in the specific application.

Q: What is the significance of the backset spacing difference between these two connectors?

A: Backset spacing defines the distance from the mounting flange to the rear of the connector body. The L77DD50SAM4 has a backset spacing of 0.319" (8.10mm), while the 174-E50-213R001 has 0.370" (9.40mm). This difference affects the depth of the connector when mounted and must be verified against the available space in the application enclosure or panel.

Q: How do the shell material finishes differ between these connectors?

A: The L77DD50SAM4 features a tin-plated steel shell, while the 174-E50-213R001 features a nickel-plated steel shell. Tin plating provides good solderability and corrosion resistance in standard environments. Nickel plating offers enhanced corrosion resistance in harsh or marine environments and provides superior electromagnetic shielding properties.

Q: What is the difference between the contact finish specifications?

A: The L77DD50SAM4 specifies a gold contact finish with a thickness of 8.00µin (0.203µm), providing a defined contact resistance and wear characteristics. The 174-E50-213R001 specifies a flash gold finish, which is a minimal thickness coating. Flash gold finishes are suitable for general-purpose applications but may have different contact resistance characteristics.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are RoHS compliant. The L77DD50SAM4 carries RoHS Compliant status. The 174-E50-213R001 carries ROHS3 Compliant status and is REACH Unaffected. Both parts are classified under the same ECCN (EAR99) and HTSUS (8536.69.4040) codes.

Q: What is the impact of the different dielectric materials on connector performance?

A: The L77DD50SAM4 uses a glass-filled thermoplastic dielectric, while the 174-E50-213R001 uses polyamide (PA6T) nylon 6T. Both materials provide electrical insulation and mechanical support. The glass-filled thermoplastic offers enhanced rigidity and thermal stability, while polyamide provides good mechanical properties and chemical resistance. Material selection should be verified against specific environmental and mechanical requirements.

Q: Can the operating temperature range difference affect connector selection?

A: Yes. The L77DD50SAM4 operates from -55°C to 125°C, while the 174-E50-213R001 operates from -50°C to 100°C. Applications requiring operation below -50°C or above 100°C must use the L77DD50SAM4. The 5°C difference at the lower end and 25°C difference at the upper end may be critical in extreme environment applications.

Q: What does the current rating difference mean for circuit design?

A: The L77DD50SAM4 is rated for 7.5A per contact, while the 174-E50-213R001 is rated for 5A per contact. For applications requiring current transmission above 5A per contact, the L77DD50SAM4 must be used. The current rating affects heat dissipation and contact wear characteristics during operation.