SI-50174-F RJ45 Modular Connector Equivalent & Substitute Parts

Part Overview

The SI-50174-F is a 1-port RJ45 through-hole modular connector manufactured by Stewart Connector, designed for 10/100 Base-T Ethernet applications. This connector features a 90° right-angle orientation with integrated LED indicators and is classified as an active product. Alternative equivalent parts may be required due to inventory availability, lead time considerations, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Substiute Parts

SI-50174-F

Stewart ConnectorIn Stock: 1128SI-50174-F Datasheet

Current PartRFQ

0480250002

MolexIn Stock: 16260480250002 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI-50174-F is determined by strict alignment with the following core parameters:

• Connector Type & Port Configuration: RJ45, single port
• Application Compatibility: 10/100 Base-T Ethernet
• Physical Mounting: Through-hole solder termination with 90° right-angle orientation
• Electrical & Mechanical Specifications: 5 cores per jack, shielded construction with EMI finger, gold-plated contacts at 50.0µin thickness
• Compliance & Environmental: ROHS3 compliance, MSL 1 rating, REACH unaffected status

The substitute part 0480250002 (Molex 48025 series) meets all these criteria and is therefore electrically and mechanically interchangeable within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

Both the SI-50174-F and 0480250002 are active products with ROHS3 compliance and REACH unaffected status. The primary differences are:

• Height Above Board: The Molex 0480250002 is 0.026" (0.66mm) lower than the Stewart Connector SI-50174-F. This difference must be evaluated against PCB layout and mechanical clearance requirements.
• Contact Base Material: The Stewart Connector uses Copper Alloy while Molex uses Phosphor Bronze. Both achieve the same gold contact finish thickness and electrical performance within 10/100 Base-T specifications.
• Housing Material: Stewart Connector housing is Thermoplastic; Molex housing is Thermoplastic with Glass Filling, providing enhanced mechanical rigidity.
• Operating Temperature: Molex specifies -40°C ~ 70°C; Stewart Connector does not specify an operating temperature range in the provided data.

Selection between these parts should be based on specific PCB layout constraints, mechanical durability requirements, and thermal operating conditions of the target application.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0480250002 be used as a direct replacement for the SI-50174-F?

A: Yes, within the specified electrical and mechanical parameter set. Both connectors are RJ45 single-port through-hole solder-terminated devices with 90° right-angle orientation, 5-core jack configuration, shielded EMI construction, and gold-plated contacts. The 0.026" height difference must be evaluated for PCB layout compatibility.

Q: What are the critical parameters that determine substitution eligibility?

A: Connector type (RJ45), port count (1), application (10/100 Base-T), mounting method (through-hole solder), orientation (90° right-angle), core count (5), shielding type (shielded with EMI finger), contact finish (gold at 50.0µin), and compliance certifications (ROHS3, MSL 1).

Q: Does the difference in contact base material affect electrical performance?

A: No. Both Copper Alloy and Phosphor Bronze achieve the same gold contact finish thickness and are suitable for 10/100 Base-T Ethernet applications. The base material difference does not impact electrical conductivity or signal integrity within the specified application range.

Q: Are there packaging considerations when selecting between these parts?

A: The SI-50174-F packaging is not specified in the provided data. The Molex 0480250002 is supplied in Tray packaging. Packaging format may affect procurement, handling, and assembly processes depending on production volume and automation requirements.

Q: What is the significance of the housing material difference?

A: The Molex 0480250002 uses glass-filled thermoplastic housing, which provides enhanced mechanical strength and dimensional stability compared to standard thermoplastic. This may be beneficial in applications requiring higher vibration resistance or thermal cycling durability.