L77DD50SOL2RM8 Equivalent & Substitute Parts Reference

Part Overview

The L77DD50SOL2RM8 is a 50-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This through-hole solder-terminated connector features female sockets with a vertical orientation and mating-side female screwlock design. The connector is actively produced and maintains full RoHS compliance with UL94 V-0 flammability rating.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit alternative configurations. The parts listed below maintain functional equivalence within defined electrical and mechanical parameters specific to D-Sub receptacle connectors.

Substiute Parts

L77DD50SOL2RM8

Amphenol ICC (Commercial Products)In Stock: 1212L77DD50SOL2RM8 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

Substitution eligibility for D-Sub receptacle connectors is determined by strict alignment of the following parameters:

Critical Parameters (Must Match):

• Connector type: Receptacle, Female Sockets
• Number of positions: 50
• Number of rows: 3
• Shell size: 5 (DD, D)
• Termination method: Solder
• Contact type: Signal

Allowable Variations:

• Mounting configuration (through-hole vs. panel mount)
• Flange feature design (mating-side screwlock vs. unthreaded housing)
• Shell finish material (tin plated vs. cadmium plated)
• Contact material composition (brass vs. phosphor bronze)
• Contact finish thickness specifications
• Color designation
• Dielectric material formulation

Compliance Considerations:

• RoHS status may differ between active and obsolete products
• Operating temperature ranges may vary within acceptable limits
• Current rating specifications must support application requirements

The substitute parts identified below satisfy the core functional requirements while permitting variations in secondary characteristics.

Parameter Comparison

Engineering Selection Recommendations

DDM50S332N (Amphenol ICC/FCI) - Primary Substitute:

This part maintains identical electrical specifications (7.5A current rating, 300V voltage rating, -55°C to 125°C operating range) and mechanical configuration (50-position, 3-row, shell size 5, through-hole solder termination). Both parts originate from Amphenol ICC manufacturing. The primary distinction is shell finish material (yellow cadmium plated vs. tin plated) and contact material composition (phosphor bronze vs. brass). This substitute is suitable for applications where RoHS non-compliance is acceptable and cadmium plating is permitted by design specifications. Current inventory: 827 pieces.

172-050-212R001 (NorComp Inc.) - Secondary Substitute:

This connector satisfies core positional and mechanical requirements (50-position, 3-row, shell size 5, solder termination) but presents three significant deviations: reduced current rating (5A vs. 7.5A), narrower operating temperature range (-50°C to 100°C vs. -55°C to 125°C), and obsolete product status. This part is suitable only for applications with lower current demands and standard temperature operating conditions. ROHS3 compliance is maintained. Current inventory: 754 pieces. Selection of this part requires confirmation that application current and temperature requirements do not exceed specified limits.

Compliance Considerations:

The L77DD50SOL2RM8 maintains active production status with full RoHS compliance. The DDM50S332N substitute is RoHS non-compliant and should be selected only when regulatory requirements permit. The 172-050-212R001 is obsolete but ROHS3 compliant, indicating it may be suitable for legacy system maintenance where supply of the primary part is unavailable.

Frequently Asked Questions (FAQ)

Q: Can DDM50S332N be used as a direct replacement for L77DD50SOL2RM8?

A: DDM50S332N satisfies all critical functional parameters: 50-position receptacle, female sockets, 3-row configuration, shell size 5, through-hole solder termination, 7.5A current rating, and 300V voltage rating with identical -55°C to 125°C operating range. The connector is mechanically and electrically compatible. However, RoHS compliance status differs (non-compliant vs. compliant), and shell finish material varies (yellow cadmium plated vs. tin plated). Selection depends on regulatory requirements and environmental specifications of the application.

Q: What are the limitations of 172-050-212R001 as a substitute?

A: The 172-050-212R001 maintains positional and mechanical compatibility but operates at reduced current capacity (5A vs. 7.5A) and narrower temperature range (-50°C to 100°C vs. -55°C to 125°C). Additionally, this part is obsolete, indicating discontinued production. Use this substitute only when application current requirements do not exceed 5A and operating conditions remain within -50°C to 100°C limits. Obsolete status may result in limited future availability.

Q: Are there packaging differences between these connectors?

A: Yes. The L77DD50SOL2RM8 is supplied in tray packaging. The DDM50S332N is supplied in bulk packaging. The 172-050-212R001 is supplied in tray packaging. Packaging format may affect handling, storage, and integration into assembly processes. Verify packaging compatibility with receiving and assembly procedures.

Q: How do contact finish specifications affect substitution?

A: Contact finish thickness varies: L77DD50SOL2RM8 specifies 8.00µin (0.203µm) gold, DDM50S332N specifies 50.0µin (1.27µm) gold, and 172-050-212R001 specifies flash gold. Thicker gold plating (DDM50S332N) provides enhanced wear resistance and corrosion protection in high-cycle mating applications. Thinner specifications (L77DD50SOL2RM8, 172-050-212R001) are suitable for standard-use applications. Selection depends on expected mating cycles and environmental exposure.

Q: What is the significance of shell material differences?

A: L77DD50SOL2RM8 and 172-050-212R001 use tin-plated steel shells, while DDM50S332N uses yellow cadmium-plated steel. Tin plating provides corrosion resistance suitable for standard industrial environments. Cadmium plating offers superior corrosion resistance in harsh environments but is restricted under RoHS regulations. Selection depends on environmental exposure and regulatory compliance requirements.

Q: Can these connectors be used interchangeably in existing PCB designs?

A: Mechanical compatibility exists for through-hole mounting applications. However, the 172-050-212R001 includes panel-mount capability, which may affect footprint requirements. Verify PCB layout accommodates the selected connector's mounting configuration. All three connectors use identical pin spacing and shell size 5 configuration, supporting electrical interchangeability for signal applications within specified current and voltage ratings.