SI-40131 Equivalent & Substitute Parts Reference

Part Overview

The SI-40131 is a 2-port RJ45 through-hole modular connector manufactured by Stewart Connector, designed for 10/100 Base-T networking applications with AutoMDIX capability. This connector features a 90° right-angle orientation, solder termination, and integrated EMI shielding with board guide support. The part is currently active in production with 984 units in stock. Alternative components may be required due to supply constraints, design revisions, or specific application requirements where equivalent electrical and mechanical parameters are maintained.

Substiute Parts

SI-40131

Stewart ConnectorIn Stock: 1093SI-40131 Datasheet

Current PartRFQ

J8064D628ANL

Pulse ElectronicsIn Stock: 3405J8064D628ANL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI-40131 is determined by strict alignment of the following critical parameters:

• Connector Type & Port Configuration: RJ45 connector with exactly 2 ports
• Mounting & Orientation: Through-hole mounting with 90° right-angle orientation
• Electrical Application: 10/100 Base-T networking with AutoMDIX support
• Termination Method: Solder termination
• Physical Characteristics: Height above board within acceptable tolerance, board guide feature, down-facing tab direction
• Shielding & EMI Protection: Shielded construction with EMI finger
• Contact Properties: Gold finish on 4-core jack configuration

The J8064D628ANL from Pulse Electronics meets all substitution criteria across these parameters, maintaining functional and mechanical compatibility with the SI-40131 in 10/100 Base-T applications.

Parameter Comparison

Engineering Selection Recommendations

SI-40131 (Stewart Connector MagJack® ST SI-40000 Series)

Select this part when RoHS non-compliant status is acceptable for your application. The SI-40131 maintains active production status with established supply availability (984 units in stock). This connector is suitable for legacy systems or applications where RoHS compliance is not a regulatory requirement.

J8064D628ANL (Pulse Electronics PULSEJACK™ J8 Series)

Select this substitute when RoHS compliance is required. The J8064D628ANL is RoHS compliant and maintains all critical electrical and mechanical parameters equivalent to the SI-40131. Both connectors support 10/100 Base-T networking with AutoMDIX, identical through-hole solder termination, and matching physical form factors. The height differential of 0.009" (0.23mm) is within acceptable PCB layout tolerance. This part is actively produced with higher inventory availability (3333 units in stock).

Both parts are suitable for direct substitution in 10/100 Base-T applications where the specified mechanical and electrical parameters are required.

Frequently Asked Questions (FAQ)

Q: Can the J8064D628ANL replace the SI-40131 in existing designs?

A: Yes. Both connectors share identical connector type (RJ45), port configuration (2 ports), mounting method (through-hole solder), orientation (90° right-angle), and application support (10/100 Base-T with AutoMDIX). The 0.009" height difference is within standard PCB layout tolerance and does not affect functional compatibility.

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

A: The J8064D628ANL is RoHS compliant, while the SI-40131 is RoHS non-compliant. The J8064D628ANL also specifies operating temperature range (0°C ~ 70°C) and detailed contact material composition (Phosphor Bronze with Brass shielding), whereas the SI-40131 does not provide these specifications. Both parts are functionally equivalent for 10/100 Base-T networking applications.

Q: Are there packaging differences between these connectors?

A: The SI-40131 packaging is not specified in the available data. The J8064D628ANL is supplied in Tray packaging. Verify packaging requirements with your procurement process before finalizing substitution.

Q: Do both connectors support AutoMDIX functionality?

A: Yes. Both the SI-40131 and J8064D628ANL include AutoMDIX capability for 10/100 Base-T applications, eliminating the need for crossover cables in network configurations.

Q: What is the significance of the LED color difference?

A: The SI-40131 features Green-Green LED indicators, while the J8064D628ANL features Green-Yellow LED indicators. LED color selection does not affect electrical compatibility or substitution eligibility; it is a visual indicator preference based on application requirements.

Q: Are both parts suitable for high-speed Ethernet applications beyond 10/100 Base-T?

A: No. Both connectors are specified for 10/100 Base-T and 10/100 Base-TX applications only. They are not rated for Gigabit Ethernet (1000 Base-T) or higher-speed networking standards.