Molex 0440500004 Modular Connector RJ45 Jack - Equivalent & Substitute Parts

Part Overview

The Molex 0440500004 is a shielded modular jack connector (8P8C/RJ45) designed for Ethernet applications with 90° right-angle orientation and through-hole solder termination. This part is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity. The connector features EMI shielding, board lock functionality, and Cat5 rating suitable for network infrastructure applications.

Substiute Parts

0440500004

MolexIn Stock: 10030440500004 Datasheet

Current PartRFQ

0440500002

MolexIn Stock: 15400440500002 Datasheet

MFR RecommendedRFQ

0440500007

MolexIn Stock: 9800440500007 Datasheet

MFR RecommendedRFQ

7499010211A

Würth ElektronikIn Stock: 10001757499010211A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

• Connector Type & Configuration: 8P8C (RJ45) jack, single port
• Mounting & Orientation: Through-hole solder termination with 90° right-angle orientation
• Electrical Performance: Cat5 rating or higher for Ethernet applications
• Shielding: EMI shielded construction
• Environmental Compliance: ROHS3 compliance and operating temperature range

The substitute parts are grouped into two categories:

Category 1 - Direct Molex Series Equivalents (0440500002, 0440500007): Active production parts within the same 44050 series, maintaining identical mechanical and electrical specifications with only packaging and inventory status differences.

Category 2 - Cross-Manufacturer Equivalent (Würth Elektronik 7499010211A): Alternative manufacturer solution with compatible form factor and electrical performance, though with extended LED functionality and different contact material specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Molex 0440500002 and 0440500007): These parts are recommended as direct replacements for the obsolete 0440500004. Both maintain identical electrical and mechanical specifications within the 44050 series, with active product status and full ROHS3 compliance. Selection between these two is determined by packaging requirements: 0440500002 is supplied in trays, while 0440500007 is supplied in trays with additional cross-manufacturer substitute options documented.

Secondary Substitute (Würth Elektronik 7499010211A): This part provides functional equivalence for applications requiring 10/100 Base-T Ethernet connectivity with AutoMDIX support. The operating temperature range (0°C ~ 70°C) is narrower than the Molex alternatives, and contact finish thickness is reduced (30.0µin versus 50.0µin). This part is suitable for standard commercial temperature environments where the extended low-temperature performance of the Molex parts is not required.

All substitute options maintain ROHS3 compliance and are actively produced, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can Molex 0440500002 and 0440500007 be used interchangeably with the obsolete 0440500004?

A: Yes. Both parts are active production equivalents within the Molex 44050 series with identical electrical and mechanical specifications. The primary difference is packaging format (tray). Both are direct functional replacements.

Q: What are the key differences between the Molex and Würth Elektronik options?

A: The Würth Elektronik 7499010211A differs in three areas: (1) operating temperature range is limited to 0°C ~ 70°C versus -40°C ~ 85°C for Molex parts, (2) contact finish thickness is 30.0µin versus 50.0µin, and (3) contact material is tin versus phosphor bronze. These differences do not affect standard Ethernet 10/100 Base-T applications in commercial environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The Molex 0440500002, 0440500007, and Würth Elektronik 7499010211A are all ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What determines whether a part can substitute for the 0440500004?

A: Substitution is based on matching: connector type (8P8C RJ45 jack), port count (1), mounting method (through-hole solder), orientation (90° right-angle), shielding (EMI shielded), and electrical rating (Cat5 or higher). All listed substitutes meet these criteria.

Q: Should I consider the Würth Elektronik part for new designs?

A: The Würth Elektronik 7499010211A is suitable for new designs requiring standard commercial temperature operation (0°C ~ 70°C). For applications requiring extended temperature range (-40°C ~ 85°C), the Molex alternatives are required.

Q: What is the impact of different contact finish thicknesses?

A: Contact finish thickness affects long-term durability and wear resistance. The Molex parts with 50.0µin gold plating provide enhanced durability for high-cycle mating applications. The Würth Elektronik part with 30.0µin finish is adequate for standard fixed installation applications.