SI-50201-F RJ45 Modular Connector Equivalent & Substitute Parts

Part Overview

The SI-50201-F is a 1-port RJ45 through-hole modular connector manufactured by Stewart Connector, designed for 10/100 Base-T Ethernet applications with AutoMDIX capability. This connector features a 90° right-angle orientation, solder termination, and integrated shielding with EMI finger protection. The product is currently active and ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory availability, or specific manufacturing preferences while maintaining functional and mechanical compatibility.

Substiute Parts

SI-50201-F

Stewart ConnectorIn Stock: 953SI-50201-F Datasheet

Current PartRFQ

0480251190

MolexIn Stock: 44530480251190 Datasheet

DirectRFQ

74990112116A

Würth ElektronikIn Stock: 92474990112116A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI-50201-F are qualified based on strict equivalence across the following critical parameters:

• Connector Type: RJ45
• Number of Ports: 1
• Mounting Type: Through Hole
• Orientation: 90° Angle (Right)
• Termination: Solder
• Applications: 10/100 Base-T, AutoMDIX
• Shielding: Shielded, EMI Finger
• Number of Cores per Jack: 4
• LED Color: Green - Yellow
• Tab Direction: Up
• Contact Finish: Gold
• RoHS Status: ROHS3 Compliant
• MSL Rating: 1 (Unlimited)

The identified substitutes—Molex 0480251190 and Würth Elektronik 74990112116A—meet all these core functional and mechanical requirements. Variations in height above board, contact material composition, shield material, housing material, and operating temperature ranges do not affect functional interchangeability for the specified 10/100 Base-T Ethernet application.

Parameter Comparison

Engineering Selection Recommendations

All three connectors—SI-50201-F, 0480251190, and 74990112116A—are active products with ROHS3 compliance and REACH unaffected status, making them suitable for current design implementations. Selection among these parts should be based on:

• Inventory availability and lead time requirements
• Packaging format preference (bulk, tray, or tube)
• Manufacturer supply chain stability
• PCB layout constraints related to height above board variations (ranging from 13.31mm to 13.97mm)
• Contact finish thickness requirements for specific application durability profiles

The minor variations in height above board (0.026" maximum difference) and contact finish thickness (20.0µin maximum difference) do not affect electrical performance or mechanical fit for standard 10/100 Base-T Ethernet applications with through-hole PCB mounting.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0480251190 be used as a direct replacement for the SI-50201-F?

A: Yes. Both connectors share identical functional specifications for 10/100 Base-T Ethernet applications, including RJ45 type, 1-port configuration, 90° right-angle orientation, solder termination, shielding with EMI finger, and gold contact finish. The 0.026" difference in height above board is within typical PCB layout tolerances for through-hole applications.

Q: What is the difference between the Würth Elektronik 74990112116A and the other two options?

A: The 74990112116A maintains full functional equivalence but features a contact finish thickness of 30.0µin compared to 50.0µin for the other two parts. This represents a thinner gold plating layer. All three parts are ROHS3 compliant and suitable for 10/100 Base-T applications.

Q: Are there any compatibility issues with PCB footprints?

A: All three connectors use through-hole solder termination with identical pin configurations for RJ45 connectivity. Height above board variations (13.31mm to 13.97mm) are minor and should not affect standard PCB footprint designs. Verify specific PCB layout clearances if space constraints exist.

Q: Do all substitute parts have the same packaging options?

A: No. The SI-50201-F is supplied in standard packaging, the Molex 0480251190 is packaged in trays, and the Würth Elektronik 74990112116A is packaged in tubes. Packaging format may affect handling, storage, and ordering quantities but does not impact electrical or mechanical performance.

Q: Are all parts suitable for industrial temperature ranges?

A: The Molex 0480251190 operates from -40°C to 70°C, and the Würth Elektronik 74990112116A operates from -40°C to 85°C. Operating temperature specifications were not provided for the SI-50201-F. For applications requiring extended temperature ranges, the Würth Elektronik part offers the widest operating window.