SS71800-025F Equivalent & Substitute Parts

Part Overview

The SS71800-025F is a modular jack connector manufactured by Stewart Connector, designed for 8p8c (RJ45, Ethernet) applications with vertical unshielded configuration and Cat5e rating. This connector features through-hole solder termination with board lock functionality and operates across -40°C to 85°C temperature range.

The SS71800-025F is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this connector is specified.

Substiute Parts

SS71800-025F

Stewart ConnectorIn Stock: 946SS71800-025F Datasheet

Current PartRFQ

SS-7188VS-A-NF-50

Stewart ConnectorIn Stock: 1889SS-7188VS-A-NF-50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS71800-025F is determined by the following core parameters:

• Connector type (Jack) and contact configuration (8p8c RJ45 Ethernet)
• Mounting method (Through Hole) and orientation (Vertical)
• Termination type (Solder)
• Port and row configuration (1 port, 1 row)
• Operating temperature range compatibility (-40°C ~ 85°C)
• Contact material (Copper Alloy) and finish (Gold)
• Housing material (Thermoplastic)
• Mechanical features (Board Lock, User Selectable Tab Direction)

The substitute part SS-7188VS-A-NF-50 meets all core substitution criteria. The primary difference is shielding classification: the original part is unshielded (Cat5e), while the substitute is shielded (Cat5). Both maintain identical mechanical interfaces, electrical contact specifications, and operational parameters necessary for direct functional replacement in through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

The SS-7188VS-A-NF-50 is the qualified substitute for the obsolete SS71800-025F. Selection of this substitute is supported by the following factors:

The substitute maintains active product status with Stewart Connector, ensuring long-term availability and supply chain continuity. Both parts share identical mechanical and electrical interfaces, connector geometry, and operational specifications across the full temperature range.

The substitute incorporates shielding, which provides enhanced electromagnetic interference (EMI) rejection compared to the unshielded original. This represents a functional improvement for applications requiring noise immunity, while maintaining backward compatibility with existing PCB layouts and mating connectors.

The substitute achieves RoHS3 compliance, meeting current regulatory requirements for new production. Both parts maintain REACH unaffected status and EAR99 export classification.

The increased contact finish thickness (50.0µin versus 30.0µin) on the substitute provides enhanced durability and extended contact life under repeated mating cycles.

Frequently Asked Questions (FAQ)

Q: Can SS-7188VS-A-NF-50 be used as a direct replacement for SS71800-025F in existing designs?

A: Yes. Both connectors share identical through-hole footprints, vertical orientation, solder termination, and mechanical interface specifications. The substitute will mount directly to existing PCB layouts without modification.

Q: What is the primary difference between these two connectors?

A: The main difference is shielding. The SS71800-025F is unshielded with Cat5e rating, while the SS-7188VS-A-NF-50 is shielded with Cat5 rating. The shielded design provides improved EMI rejection. Both maintain identical electrical contact specifications and operating temperature ranges.

Q: Why is the original part obsolete?

A: The SS71800-025F is classified as obsolete by Stewart Connector. The SS-7188VS-A-NF-50 represents the current active product line replacement, offering improved specifications and regulatory compliance.

Q: Are there packaging differences between these parts?

A: The original part is listed with unspecified packaging, while the substitute is supplied in Tray packaging. This does not affect electrical or mechanical compatibility.

Q: Does the shielded design affect PCB layout or design considerations?

A: The shielded substitute maintains the same through-hole footprint and vertical orientation as the original. No PCB layout modifications are required. The shielding provides additional noise immunity without design changes.

Q: What is the contact finish thickness difference, and does it matter?

A: The substitute features 50.0µin (1.27µm) gold finish compared to 30.0µin (0.76µm) on the original. The thicker finish on the substitute provides enhanced contact durability and extended service life under repeated mating cycles.

Q: Are both parts compliant with current regulations?

A: The substitute is RoHS3 compliant. Both parts maintain REACH unaffected status and EAR99 export classification, meeting current regulatory requirements.