TE Connectivity 520251-4 Modular Connector: Equivalent & Substitute Parts

Part Overview

The TE Connectivity 520251-4 is a Jack Modular Connector with 8p8c (RJ45, Ethernet) configuration, featuring 90° right-angle orientation and unshielded design rated for Cat3 applications. This connector is designed for through-hole solder termination with board lock and panel stop features.

The 520251-4 carries an obsolete product status, making identification of active equivalent parts essential for ongoing procurement and design continuity. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Substiute Parts

520251-4

TE Connectivity AMP ConnectorsIn Stock: 1244520251-4 Datasheet

Current PartRFQ

5520251-4

TE Connectivity AMP ConnectorsIn Stock: 45595520251-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 520251-4 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part 5520251-4 maintains identical specifications in the following categories:

Electrical Parameters:

• 8p8c (RJ45, Ethernet) contact configuration
• Cat3 rating
• Phosphor bronze contact material with 50.0µin gold finish
• Unshielded design

Mechanical Parameters:

• 90° right-angle orientation
• Through-hole solder termination
• Board lock and panel stop features
• Down tab direction
• PBT polyester housing material
• Operating temperature range of -40°C to 85°C

The substitute part differs only in product status (active versus obsolete) and compliance certifications, with no functional or dimensional variations.

Parameter Comparison

Engineering Selection Recommendations

The 5520251-4 is the direct active equivalent of the obsolete 520251-4. Both parts are manufactured by TE Connectivity AMP Connectors and maintain complete functional and dimensional compatibility across all electrical and mechanical parameters.

Product Status Consideration: The 520251-4 is classified as obsolete, while the 5520251-4 is active. For new designs, ongoing production, or long-term procurement strategies, the 5520251-4 is the appropriate selection due to its active status and assured availability.

Compliance Consideration: The 5520251-4 carries RoHS Compliant certification and REACH Unaffected status, compared to the 520251-4 which is RoHS non-compliant with vendor-undefined REACH status. Organizations subject to RoHS or REACH regulatory requirements should specify the 5520251-4.

Packaging Consideration: The 5520251-4 is supplied in tray packaging, which may differ from the original packaging of the 520251-4. Verify packaging requirements for your procurement and assembly processes.

Both parts are suitable for Cat3 Ethernet applications requiring 8p8c (RJ45) jack connectors with 90° right-angle through-hole solder termination and unshielded configuration.

Frequently Asked Questions (FAQ)

Q: Are the 520251-4 and 5520251-4 electrically identical?

A: Yes. Both parts feature identical 8p8c (RJ45, Ethernet) contact configurations, Cat3 ratings, phosphor bronze contacts with 50.0µin gold finish, and unshielded design. Electrical performance is equivalent.

Q: Are the 520251-4 and 5520251-4 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including 90° right-angle orientation, through-hole solder termination, board lock and panel stop features, down tab direction, and PBT polyester housing. Direct substitution is possible without PCB redesign.

Q: Why is the 520251-4 listed as obsolete?

A: The 520251-4 has been superseded by the 5520251-4 in the TE Connectivity product line. The 5520251-4 is the active equivalent and is recommended for all new applications and ongoing procurement.

Q: What is the difference in packaging between these parts?

A: The 520251-4 packaging is not specified in available documentation. The 5520251-4 is supplied in tray packaging. Confirm packaging requirements with your procurement department before ordering.

Q: Does the 5520251-4 meet RoHS requirements?

A: Yes. The 5520251-4 is RoHS Compliant, whereas the 520251-4 is RoHS non-compliant. If your application or regulatory environment requires RoHS compliance, the 5520251-4 is the appropriate choice.

Q: Can I use the 5520251-4 as a direct replacement in existing designs using the 520251-4?

A: Yes. The 5520251-4 is a direct functional and mechanical equivalent. No design changes are required. Verify that your procurement and assembly processes accommodate tray packaging if this differs from your current supply chain.

Q: What is the operating temperature range for both connectors?

A: Both the 520251-4 and 5520251-4 operate across the temperature range of -40°C to 85°C, making them suitable for industrial and commercial networking applications.

Q: Are both connectors suitable for Cat3 Ethernet applications?

A: Yes. Both connectors are rated for Cat3 Ethernet applications and feature 8p8c (RJ45) jack configuration with unshielded design appropriate for Cat3 performance levels.