SS-666604-NF Modular Connector Equivalent & Substitute Parts

Part Overview

The SS-666604-NF is a jack modular connector from Stewart Connector's 66 series, designed for 6p6c (RJ11, RJ12, RJ14, RJ25) applications. This connector features a 90° right-angle orientation, through-hole solder termination, and unshielded construction rated for Cat5 performance. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

SS-666604-NF

Stewart ConnectorIn Stock: 1006SS-666604-NF Datasheet

Current PartRFQ

SS66600-027G

Stewart ConnectorIn Stock: 1049SS66600-027G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS-666604-NF is determined by strict equivalence across the following critical parameters:

• Connector type (Jack)
• Contact configuration (6p6c RJ11/RJ12/RJ14/RJ25)
• Number of ports (4)
• Mounting method (Through Hole)
• Orientation (90° right angle)
• Termination method (Solder)
• Shielding configuration (Unshielded)
• Contact material and finish (Copper Alloy, Gold plated)
• Operating temperature range (-40°C ~ 85°C)
• Regulatory compliance (ROHS3)

The primary substitute identified is SS66600-027G, which maintains all critical electrical and mechanical parameters while offering active product status and enhanced mechanical features.

Parameter Comparison

Engineering Selection Recommendations

The SS66600-027G is the direct substitute for the obsolete SS-666604-NF. Both components maintain identical electrical and mechanical specifications across all critical parameters, including contact configuration, termination method, operating temperature range, and regulatory compliance status.

The SS66600-027G offers the advantage of active product status, ensuring continued availability and supply chain reliability. The enhanced mechanical features (Board Lock and EPP918A) provide improved retention characteristics without altering the core electrical interface or physical mounting footprint.

Both parts maintain ROHS3 compliance and REACH unaffected status, supporting equivalent regulatory requirements for new designs and legacy system replacements.

Frequently Asked Questions (FAQ)

Q: Can SS66600-027G be used as a direct replacement for SS-666604-NF?

A: Yes. Both connectors share identical specifications for contact configuration (6p6c), port count (4), mounting method (through hole), orientation (90° right angle), termination (solder), and operating temperature range (-40°C ~ 85°C). The electrical and mechanical interfaces are equivalent.

Q: What is the difference between the Board Guide feature in SS-666604-NF and the Board Lock/EPP918A features in SS66600-027G?

A: Board Guide provides basic alignment during assembly. Board Lock with EPP918A provides enhanced mechanical retention. Both features support the same through-hole mounting footprint and do not affect electrical performance or connector compatibility.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected. Regulatory status is equivalent for both new designs and replacement applications.

Q: Does the contact finish thickness remain the same?

A: Yes. Both parts specify gold plating at 30.0µin (0.76µm) thickness, ensuring equivalent contact performance and durability.

Q: What is the MSL (Moisture Sensitivity Level) difference?

A: SS-666604-NF lists MSL as Not Applicable. SS66600-027G specifies MSL 1 (Unlimited). This indicates the substitute part has no moisture sensitivity restrictions during storage and handling.