SI-50124-F Equivalent & Substitute Parts

Part Overview

The SI-50124-F is a 1-port RJ45 through-hole modular connector manufactured by Stewart Connector, designed for 10/100/1000 Base-T Ethernet applications with AutoMDIX capability. This connector features a 90° right-angle orientation, solder termination, and integrated LED indicators (Green-Orange, Green). The product is currently active and widely used in PCB-mounted network interface applications. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate qualified alternatives.

Substiute Parts

SI-50124-F

Stewart ConnectorIn Stock: 1001SI-50124-F Datasheet

Current PartRFQ

JK0-0187NL

Pulse ElectronicsIn Stock: 1196JK0-0187NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI-50124-F is determined by strict equivalence across the following critical parameters:

• Connector Type: RJ45 (mandatory)
• Number of Ports: 1 (mandatory)
• Mounting Type: Through Hole (mandatory)
• Orientation: 90° Angle (Right) (mandatory)
• Termination: Solder (mandatory)
• Applications: 10/100/1000 Base-T, AutoMDIX (mandatory)
• Number of Cores per Jack: 12 (mandatory)
• Shielding: Shielded, EMI Finger (mandatory)
• Contact Finish: Gold (mandatory)
• Contact Finish Thickness: 50.0µin (1.27µm) (mandatory)
• Moisture Sensitivity Level: 1 (Unlimited) (mandatory)

The substitute part JK0-0187NL (Pulse Electronics PULSEJACK™ JK0 series) meets all mandatory electrical and mechanical parameters for direct substitution in 10/100/1000 Base-T Ethernet applications.

Parameter Comparison

Engineering Selection Recommendations

Both SI-50124-F and JK0-0187NL are active products with equivalent compliance certifications (RoHS, REACH, EAR99). Selection between these parts should be based on:

• Availability and lead time requirements
• Packaging format (SI-50124-F standard packaging vs. JK0-0187NL tray packaging)
• Inventory stock levels (943 pcs for SI-50124-F vs. 1138 pcs for JK0-0187NL)
• PCB layout constraints related to height above board (0.536" vs. 0.546")
• LED indicator color requirements (Green-Orange/Green vs. Green-Green)

Both connectors satisfy identical electrical specifications for 10/100/1000 Base-T Ethernet applications with AutoMDIX functionality and are suitable for direct PCB substitution.

Frequently Asked Questions (FAQ)

Q: Can JK0-0187NL replace SI-50124-F in existing designs? A: Yes. Both connectors meet identical electrical and mechanical specifications for 10/100/1000 Base-T applications. The 0.010" height difference (13.61mm vs. 13.87mm) is within standard PCB layout tolerances for through-hole components.

Q: Are there differences in LED indicator functionality? A: The SI-50124-F provides Green-Orange and Green LED indicators, while the JK0-0187NL provides Green-Green indicators. Both configurations support standard Ethernet link and activity status indication. LED color selection should be based on design requirements.

Q: What is the significance of the 12-core jack configuration? A: The 12-core jack accommodates the standard 8-pin RJ45 signal contacts plus 4 additional cores for integrated magnetics and EMI filtering. This configuration is standard for 10/100/1000 Base-T connectors with shielding and EMI fingers.

Q: Are both parts suitable for industrial temperature ranges? A: Operating temperature specifications are not provided for SI-50124-F. JK0-0187NL operates from 0°C to 70°C. Verify temperature requirements against specific application needs.

Q: What packaging considerations apply to these parts? A: SI-50124-F is supplied in standard packaging; JK0-0187NL is supplied in tray packaging. Confirm packaging compatibility with assembly and handling procedures.