L77DFD50S1BON Equivalent & Substitute Parts

Part Overview

The L77DFD50S1BON is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets with right-angle solder termination and panel mount through-hole installation. This connector is classified as a signal contact D-Sub in shell size 5 (DD, D) configuration with three rows of contacts. The part maintains active product status and is RoHS compliant with UL94 V-0 flammability rating.

Substitute parts are identified when equivalent D-Sub receptacle connectors share the same functional electrical and mechanical characteristics, including connector style, type, position count, row configuration, mounting method, shell size, termination type, and contact form. Substitution becomes necessary due to inventory availability, supply chain considerations, or manufacturing discontinuation of primary sources.

Substiute Parts

L77DFD50S1BON

Amphenol ICC (Commercial Products)In Stock: 822L77DFD50S1BON Datasheet

Current PartRFQ

174-E50-213R001

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DFD50S1BON are identified based on strict equivalence of core electrical and mechanical parameters. The substitution logic requires that alternative parts maintain identical or functionally equivalent specifications in the following critical areas:

Mandatory Equivalence Parameters:

• Connector style (D-Sub)
• Connector type (Receptacle, Female Sockets)
• Position count (50 positions)
• Row configuration (3 rows)
• Shell size and layout (5 / DD, D)
• Mounting method (Panel Mount, Through Hole, Right Angle)
• Termination type (Solder)
• Contact form (Machined)
• Contact type (Signal)
• Flange feature (Housing/Shell, Unthreaded)

The substitute part 174-E50-213R001 manufactured by NorComp Inc. satisfies all mandatory equivalence parameters, establishing it as a valid functional substitute. Variations in secondary parameters such as shell material finish, contact finish thickness, current rating, backset spacing, operating temperature range, and dielectric material do not preclude substitution when the core functional parameters remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the L77DFD50S1BON and 174-E50-213R001 maintain active product status with current manufacturing support. Selection between these parts should be based on the following engineering considerations:

Primary Selection Criteria:

The L77DFD50S1BON is the specified primary component and should be selected when available. This part provides a current rating of 7.5A, operating temperature range of -55°C to 155°C, and tin-plated steel shell construction with copper alloy contacts.

The 174-E50-213R001 serves as a functional substitute when the primary part is unavailable. This part provides a current rating of 5A, operating temperature range of -50°C to 100°C, and nickel-plated steel shell construction with brass contacts.

Compliance Considerations:

Both parts achieve UL94 V-0 flammability rating and maintain RoHS compliance status. The L77DFD50S1BON is RoHS compliant, while the 174-E50-213R001 is ROHS3 compliant. Both parts carry ECCN classification EAR99 and identical HTSUS code 8536.69.4040.

Application-Specific Factors:

Substitution of 174-E50-213R001 for L77DFD50S1BON is appropriate when circuit requirements do not exceed 5A current rating and operating temperatures remain within -50°C to 100°C range. The backset spacing variation (0.370" versus 0.406") must be evaluated for PCB layout compatibility. The dielectric material difference (Polyamide PA6T versus Thermoplastic Glass Filled) does not affect functional substitution for signal contact applications.

Frequently Asked Questions (FAQ)

Q: Can 174-E50-213R001 be used as a direct replacement for L77DFD50S1BON in all applications?

A: The 174-E50-213R001 is functionally equivalent for connector style, type, position count, row configuration, shell size, mounting method, and termination. However, application-specific requirements must be verified. If the circuit requires current ratings exceeding 5A, operating temperatures below -50°C or above 100°C, or specific backset spacing of 0.406", the primary part L77DFD50S1BON is required.

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

A: Backset spacing (0.406" for L77DFD50S1BON versus 0.370" for 174-E50-213R001) defines the distance from the mounting flange to the contact plane. This variation affects PCB layout and mounting hole positioning. PCB designs must accommodate the specific backset spacing of the selected connector.

Q: Are there differences in contact material that affect performance?

A: The L77DFD50S1BON uses copper alloy contacts while 174-E50-213R001 uses brass contacts. Both materials are suitable for signal contact applications. The contact finish (gold) is equivalent on both parts, though finish thickness varies (20.0µin versus flash). For signal-level applications, this material variation does not affect functional performance.

Q: What is the impact of the operating temperature range difference?

A: The L77DFD50S1BON operates from -55°C to 155°C, while 174-E50-213R001 operates from -50°C to 100°C. Applications requiring operation below -50°C or above 100°C must use the primary part. Applications within the -50°C to 100°C range can use either part.

Q: How do the shell material finishes compare?

A: The L77DFD50S1BON features tin-plated steel shell, while 174-E50-213R001 features nickel-plated steel shell. Both finishes provide corrosion resistance suitable for standard industrial environments. Selection between these finishes depends on specific environmental exposure requirements and application standards.

Q: Are both parts available in the same packaging format?

A: Both parts are supplied in tray packaging. The L77DFD50S1BON has 732 pieces in current inventory, while 174-E50-213R001 has 1626 pieces in current inventory. Packaging format compatibility allows for equivalent handling and storage procedures.

Q: What compliance certifications apply to both parts?

A: Both parts achieve UL94 V-0 flammability rating, indicating compliance with fire safety standards. Both parts carry ECCN classification EAR99 for export control purposes. The L77DFD50S1BON is RoHS compliant, while 174-E50-213R001 is ROHS3 compliant. Both classifications satisfy RoHS regulatory requirements.