L177DFD50SOL2 Equivalent & Substitute Parts

Part Overview

The L177DFD50SOL2 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel-mount, through-hole solder-terminated connector features female sockets in a 3-row configuration with shell size 5 (DD, D) layout. The connector is actively produced and widely used in applications requiring robust signal distribution across multiple channels.

Substitute parts become necessary when the primary part experiences extended lead times, inventory constraints, or when design requirements permit functional equivalents that meet the same electrical and mechanical specifications. The parts listed below provide alternative sourcing options while maintaining compatibility with the original design parameters.

Substiute Parts

L177DFD50SOL2

Amphenol ICC (Commercial Products)In Stock: 714L177DFD50SOL2 Datasheet

Current PartRFQ

172-050-212R001

NorComp Inc.In Stock: 772172-050-212R001 Datasheet

SimilarRFQ

DDM50S332N

Amphenol ICC (FCI)In Stock: 871DDM50S332N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L177DFD50SOL2 are identified based on strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• 50-position connector configuration
• 3-row layout with shell size 5 (DD, D)
• Receptacle type with female sockets
• Solder termination method
• Signal contact type

Mechanical Compatibility Requirements:

• Panel mount, through-hole mounting capability
• Connector style: D-Sub
• Unthreaded housing/shell flange feature

Environmental & Compliance Considerations:

• Operating temperature range capability
• Flammability rating (UL94 V-0)
• Contact material and finish specifications
• Voltage and current rating sufficiency

The substitute parts listed below meet these core requirements, though variations exist in specific attributes such as shell finish material, contact finish thickness, dielectric material composition, and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

L177DFD50SOL2 (Primary Part)

The L177DFD50SOL2 remains the preferred selection for new designs and applications requiring active product support. This connector is actively manufactured by Amphenol ICC (Commercial Products), ensuring consistent availability and supply chain reliability. The part is RoHS Compliant, meeting modern environmental and regulatory requirements. It delivers 7.5A current capacity with a 300V voltage rating across the full operating temperature range of -55°C to 125°C. The thermoplastic, glass-filled dielectric material provides robust mechanical and electrical performance.

DDM50S332N (Amphenol ICC FCI) – Active Alternative

The DDM50S332N serves as a functionally equivalent alternative from the same manufacturer family (Amphenol ICC). This part maintains active product status and shares identical electrical ratings (7.5A, 300V) and operating temperature range (-55°C to 125°C). The connector is housed in the DMW HE507 series and features phosphor bronze contacts with 50.0µin gold plating, providing enhanced contact durability compared to the primary part. However, this substitute is RoHS non-compliant and REACH Affected, making it unsuitable for applications with strict environmental compliance requirements. The DDM50S332N is supplied in bulk packaging rather than trays.

172-050-212R001 (NorComp Inc.) – Obsolete Alternative

The 172-050-212R001 is classified as obsolete and should be considered only when existing inventory must be maintained or when legacy system repairs require exact part matching. This NorComp connector meets the core mechanical and electrical requirements but operates within a reduced temperature range (-50°C to 100°C) and carries a lower current rating (5A) compared to the primary part. The contact finish is specified as flash thickness rather than the defined 30.0µin standard. The part is ROHS3 Compliant and REACH Unaffected, offering environmental advantages over the DDM50S332N. Obsolete status indicates discontinued manufacturing, limiting future availability.

Frequently Asked Questions (FAQ)

Q: Can the DDM50S332N be used as a direct replacement for the L177DFD50SOL2 in new designs?

A: The DDM50S332N provides electrical and mechanical equivalence in terms of position count, shell size, mounting configuration, and current/voltage ratings. However, the DDM50S332N is RoHS non-compliant and REACH Affected, while the L177DFD50SOL2 is RoHS Compliant. Selection depends on whether the application requires RoHS compliance. For new designs subject to environmental regulations, the L177DFD50SOL2 is the appropriate choice.

Q: What is the significance of the contact finish thickness difference between these parts?

A: Contact finish thickness affects contact durability and wear resistance. The L177DFD50SOL2 specifies 30.0µin (0.76µm) gold plating, the DDM50S332N provides 50.0µin (1.27µm), and the 172-050-212R001 specifies flash thickness. Thicker plating generally provides longer service life in high-cycle mating applications. Flash thickness offers minimal protection and is suitable only for limited-cycle applications.

Q: Why is the 172-050-212R001 marked as obsolete?

A: Obsolete status indicates that NorComp Inc. has discontinued manufacturing this part. While existing inventory may be available, no future production is guaranteed. This part should be used only for maintenance of existing systems or when legacy compatibility is mandatory. For new designs, active products such as the L177DFD50SOL2 or DDM50S332N are recommended.

Q: Are there mounting differences between these connectors?

A: The L177DFD50SOL2 and 172-050-212R001 both specify panel mount with through-hole termination. The DDM50S332N specifies through-hole mounting without explicit panel mount designation, though the connector is mechanically compatible with panel mounting applications. Verify mounting hardware compatibility with your specific panel thickness and mounting configuration.

Q: What is the impact of different shell finish materials?

A: The L177DFD50SOL2 features steel with tin plating, the DDM50S332N uses steel with yellow cadmium plating, and the 172-050-212R001 uses steel with tin plating. Tin plating provides corrosion resistance suitable for general industrial environments. Yellow cadmium plating offers enhanced corrosion resistance in harsh environments but is subject to REACH restrictions in certain jurisdictions. Verify finish compatibility with your application environment and regulatory requirements.

Q: Can these connectors be used interchangeably in existing assemblies?

A: Mechanical and electrical interchangeability exists across all three parts for the 50-position, 3-row D-Sub receptacle configuration. However, differences in operating temperature range, current rating, contact material, and regulatory compliance status require verification against your specific application requirements before substitution. The L177DFD50SOL2 is the safest choice for direct replacement due to its active status and RoHS compliance.