SS-6544-NF Modular Connector Jack 4P4C Vertical Unshielded Equivalent & Substitute Parts

Part Overview

The Stewart Connector SS-6544-NF is a modular jack connector with 4 positions and 4 contacts (4P4C), configured for vertical through-hole mounting with unshielded design. This connector supports RJ9, RJ10, and RJ22 applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Suitable alternatives maintain the same electrical and mechanical specifications while offering active product status and improved availability.

Substiute Parts

SS-6544-NF

Stewart ConnectorIn Stock: 982SS-6544-NF Datasheet

Current PartRFQ

5558872-1

TE Connectivity AMP ConnectorsIn Stock: 42315558872-1 Datasheet

MFR RecommendedRFQ

A-2014-3-1-N-T

Assmann WSW ComponentsIn Stock: 1032A-2014-3-1-N-T Datasheet

MFR RecommendedRFQ

A-2014-3-2-N-T

Assmann WSW ComponentsIn Stock: 955A-2014-3-2-N-T Datasheet

MFR RecommendedRFQ

A-2014-3-3-N-T

Assmann WSW ComponentsIn Stock: 825A-2014-3-3-N-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: connector type (jack), contact configuration (4P4C), mounting method (through hole), orientation (vertical), termination method (solder), shielding (unshielded), and operating temperature range (-40°C to 85°C). All listed substitutes meet these core requirements.

The substitute parts are grouped by manufacturer and contact finish thickness variation. TE Connectivity 5558872-1 provides Cat3 rated performance with enhanced contact finish thickness (50.0µin). Assmann WSW Components offers three variants (A-2014-3-1-N-T, A-2014-3-2-N-T, A-2014-3-3-N-T) with contact finish thickness options of 15.0µin, 30.0µin, and 50.0µin respectively. All substitutes feature board lock functionality and maintain the user-selectable tab direction of the original part.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the SS-6544-NF and maintain compatibility with RJ9, RJ10, and RJ22 applications. The primary distinction among substitutes is contact finish thickness and housing material composition.

TE Connectivity 5558872-1 is the manufacturer-recommended primary substitute, offering Cat3 rating and maximum contact finish thickness (50.0µin), providing enhanced durability for high-cycle applications. This part carries RoHS compliance certification.

Assmann WSW Components A-2014-3-2-N-T matches the original contact finish thickness specification (30.0µin) and provides ROHS3 compliance, making it suitable for direct replacement in applications with existing design validation.

Assmann WSW Components A-2014-3-1-N-T and A-2014-3-3-N-T offer alternative contact finish thicknesses (15.0µin and 50.0µin respectively) for applications with specific wear or durability requirements. All Assmann variants feature glass-filled polyester housing for improved mechanical stability.

Selection should prioritize active product status and compliance certifications appropriate to the target application and regulatory environment.

Frequently Asked Questions (FAQ)

Q: Can SS-6544-NF be directly replaced with any of these substitutes? A: Yes. All listed substitutes maintain identical electrical and mechanical specifications for the core connector function: 4P4C jack configuration, vertical through-hole mounting, solder termination, and unshielded design. Physical footprint and pin assignment are equivalent.

Q: What is the significance of contact finish thickness variation? A: Contact finish thickness affects durability under repeated mating cycles. The original SS-6544-NF specifies 30.0µin (0.76µm). TE Connectivity 5558872-1 and Assmann A-2014-3-3-N-T provide 50.0µin for extended cycle life. Assmann A-2014-3-1-N-T provides 15.0µin for cost-optimized applications with lower cycle requirements. Assmann A-2014-3-2-N-T matches the original specification exactly.

Q: Why do substitute parts use different contact materials? A: The original SS-6544-NF uses copper alloy contacts, while all substitutes use phosphor bronze. Both materials are standard for modular connectors and provide equivalent electrical performance and reliability within the specified operating temperature range.

Q: Are there packaging differences between substitutes? A: All substitutes are supplied in tray packaging. The original part packaging information was not specified. Tray packaging is standard for modular connector distribution and does not affect connector performance or compatibility.

Q: Which substitute offers the best compliance profile? A: TE Connectivity 5558872-1 and all Assmann variants carry RoHS compliance certifications (RoHS Compliant or ROHS3 Compliant). All parts maintain REACH Unaffected status. Selection should align with specific regulatory requirements of the target application.

Q: Can these substitutes be used in Cat3 rated applications? A: TE Connectivity 5558872-1 explicitly carries Cat3 rating. Assmann variants do not specify category rating but maintain equivalent electrical characteristics for standard RJ9, RJ10, and RJ22 applications. Verify category requirements against specific application standards.