L77TWA7W2SCSY D-Sub Combo Receptacle Equivalent & Substitute Parts

Part Overview

The L77TWA7W2SCSY is a 7-position D-Sub combo receptacle connector manufactured by Amphenol ICC, featuring 5 signal contacts plus 2 coaxial contacts in a panel-mount, through-hole solder configuration. This connector is classified as Active product status with full RoHS compliance and unlimited moisture sensitivity rating. Alternative equivalent parts may be required due to inventory constraints, application-specific performance requirements, or supply chain considerations while maintaining electrical and mechanical compatibility.

Substiute Parts

L77TWA7W2SCSY

Amphenol ICC (Commercial Products)In Stock: 1171L77TWA7W2SCSY Datasheet

Current PartRFQ

681S7W2203L001

NorComp Inc.In Stock: 1041681S7W2203L001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L77TWA7W2SCSY is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Connector Style: D-Sub, Combo
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 7 with 2-row configuration
• Shell Size, Connector Layout: 2 (DA, A) - 7W2
• Mounting Type: Panel Mount, Through Hole
• Termination: Solder
• Color: Black
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Sensitivity Level: 1 (Unlimited)

Allowed Variations:

• Shell Material and Finish (Steel Tin Plated vs. Steel Nickel Plated)
• Contact Finish Thickness (16.0µin vs. Flash)
• Current Rating (0.5A/7.5A vs. 5A/40A)
• Voltage Rating (150V/300V vs. unspecified)
• Contact Type composition (Coax and Signal vs. Signal and Power)
• Dielectric Material (Thermoplastic vs. Polybutylene Terephthalate)
• Ingress Protection rating (unspecified vs. IP67)
• Flammability Rating (unspecified vs. UL94 V-0)

The substitute part 681S7W2203L001 maintains all mandatory matching parameters while offering enhanced performance characteristics in current rating, ingress protection, and material certifications.

Parameter Comparison

Engineering Selection Recommendations

L77TWA7W2SCSY Selection Criteria:

• Primary choice for applications requiring coaxial signal transmission with standard current ratings (0.5A, 7.5A)
• Suitable for standard voltage applications (150V, 300V)
• RoHS Compliant status meets standard environmental regulations
• Tin-plated steel shell provides standard corrosion resistance

681S7W2203L001 Selection Criteria:

• Appropriate for applications requiring higher current capacity (5A, 40A) and power distribution
• ROHS3 Compliant status meets enhanced environmental standards
• IP67 ingress protection rating qualifies for dust-tight and waterproof applications
• UL94 V-0 flammability rating meets stringent fire safety requirements
• Nickel-plated steel shell offers enhanced corrosion resistance
• Polybutylene Terephthalate (PBT) dielectric material provides superior thermal and mechanical properties

Both connectors maintain identical mechanical compatibility through matching shell size (2 DA, A - 7W2), mounting configuration (panel mount, through hole), and operating temperature range (-55°C ~ 155°C). Selection between these parts depends on application-specific electrical performance requirements and environmental exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can the 681S7W2203L001 directly replace the L77TWA7W2SCSY in existing designs?

A: Mechanical and electrical compatibility is confirmed for the identical shell size (2 DA, A - 7W2), mounting type (panel mount, through hole), and solder termination. However, the 681S7W2203L001 features higher current ratings (5A, 40A vs. 0.5A, 7.5A) and different contact type designation (Signal and Power vs. Coax and Signal). Verify application requirements for current capacity and signal type compatibility before substitution.

Q: What is the difference between the contact type designations?

A: The L77TWA7W2SCSY specifies 5 signal contacts plus 2 coaxial contacts, optimized for mixed-signal and coaxial transmission. The 681S7W2203L001 specifies 5 signal contacts plus 2 power contacts, optimized for power distribution alongside signal transmission. Contact type selection depends on application requirements.

Q: Are both connectors RoHS compliant?

A: Yes. The L77TWA7W2SCSY carries RoHS Compliant status. The 681S7W2203L001 carries ROHS3 Compliant status, representing enhanced compliance with updated environmental directives. Both meet RoHS requirements.

Q: What is the significance of the IP67 rating on the 681S7W2203L001?

A: IP67 rating indicates dust-tight and waterproof performance. The L77TWA7W2SCSY does not specify ingress protection rating. The 681S7W2203L001 is suitable for applications requiring environmental sealing; the L77TWA7W2SCSY is suitable for standard indoor applications.

Q: How do the shell finishes compare?

A: The L77TWA7W2SCSY features tin-plated steel shell; the 681S7W2203L001 features nickel-plated steel shell. Nickel plating provides enhanced corrosion resistance in harsh environments. Tin plating provides standard corrosion resistance for typical applications.

Q: What is the difference in contact finish thickness?

A: The L77TWA7W2SCSY specifies 16.0µin (0.41µm) gold contact finish thickness. The 681S7W2203L001 specifies flash gold finish thickness. Flash finish provides minimal gold plating for cost efficiency; standard thickness provides enhanced durability and contact reliability.

Q: Are both connectors suitable for the same operating temperature range?

A: Yes. Both connectors operate across the identical temperature range of -55°C to 155°C, ensuring thermal compatibility in equivalent applications.

Q: What packaging format is used for both parts?

A: Both the L77TWA7W2SCSY and 681S7W2203L001 are supplied in Tray packaging format suitable for automated assembly and component handling.