SS-668805-NF Equivalent & Substitute Parts

Part Overview

The SS-668805-NF is a modular jack connector manufactured by Stewart Connector, designed for 8p8c (RJ45, Ethernet) applications with 90° right-angle orientation and shielded construction. This connector is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The through-hole solder termination and board guide features support reliable PCB integration in networking and telecommunications equipment.

Substiute Parts

SS-668805-NF

Stewart ConnectorIn Stock: 1054SS-668805-NF Datasheet

Current PartRFQ

SS-668805S-NF

Stewart ConnectorIn Stock: 1025SS-668805S-NF Datasheet

MFR RecommendedRFQ

5557563-1

TE Connectivity AMP ConnectorsIn Stock: 22065557563-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS-668805-NF is determined by the following critical parameters:

• Connector Type & Configuration: Must be jack-type modular connector with 8p8c (RJ45, Ethernet) contact arrangement
• Mechanical Compatibility: 90° right-angle orientation, through-hole mounting, and down-facing tab direction are required for PCB layout compatibility
• Electrical Characteristics: Operating temperature range of -40°C ~ 85°C and gold-plated contacts ensure functional equivalence
• Shielding Requirement: Shielded construction is mandatory for EMI/RFI protection in the original application

Two substitute parts are identified based on these parameters:

1. SS-668805S-NF (Stewart Connector) — Direct manufacturer upgrade with identical mechanical and electrical specifications and active product status
2. 5557563-1 (TE Connectivity) — Functionally compatible alternative with unshielded construction, suitable only where shielding is not required

Parameter Comparison

Engineering Selection Recommendations

SS-668805S-NF is the primary recommended substitute for direct replacement applications. This part maintains identical mechanical, electrical, and shielding characteristics while offering active product status and ROHS3 compliance, eliminating obsolescence risk and ensuring long-term supply chain availability.

5557563-1 serves as a secondary alternative only in applications where shielding is not a functional requirement. This TE Connectivity part provides equivalent mechanical compatibility and operating temperature performance but differs in shielding architecture (unshielded), contact material composition (phosphor bronze vs. copper alloy), and contact finish thickness (50.0µin vs. 30.0µin). Selection of this part requires explicit confirmation that EMI/RFI shielding is not necessary for the intended application.

Both substitute parts maintain compliance with export control classifications (EAR99) and moisture sensitivity specifications identical to the original part.

Frequently Asked Questions (FAQ)

Q: Can SS-668805S-NF be used as a direct drop-in replacement for SS-668805-NF?

A: Yes. SS-668805S-NF maintains identical specifications for connector type, contact configuration, orientation, mounting method, termination, shielding, operating temperature range, and tab direction. The part is mechanically and electrically interchangeable.

Q: What is the key difference between SS-668805S-NF and 5557563-1?

A: The primary difference is shielding. SS-668805S-NF is shielded (matching the original part), while 5557563-1 is unshielded. Additionally, 5557563-1 uses phosphor bronze contacts with thicker gold plating (50.0µin) compared to copper alloy contacts with 30.0µin plating in the original part. Both maintain identical mechanical form factor and operating temperature range.

Q: Is 5557563-1 suitable for my application if the original design used SS-668805-NF?

A: Only if your application does not require shielded construction. If EMI/RFI protection is specified in your design requirements, 5557563-1 is not compatible. Verify shielding necessity before selecting this substitute.

Q: What is the inventory status of these substitute parts?

A: SS-668805S-NF has 979 pieces in stock, and 5557563-1 has 2100 pieces in stock, both available as new original components.

Q: Are both substitute parts RoHS compliant?

A: Yes. SS-668805S-NF is ROHS3 compliant, and 5557563-1 is RoHS compliant. Both meet current environmental and regulatory standards.

Q: Does the difference in contact finish thickness affect performance?

A: Contact finish thickness is provided as a specification parameter. The 50.0µin finish on 5557563-1 exceeds the 30.0µin specification of the original part. Compatibility depends on your specific application requirements and design validation.