TE Connectivity AMP Connectors 1840120-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1840120-4 is a 2-port RJ45 modular connector jack designed for 10/100 Base-T Ethernet applications with AutoMDIX functionality. This component features through-hole mounting with a 90° right-angle orientation and dual LED indicators (green and yellow). The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations where legacy compatibility is not required.

Substiute Parts

1840120-4

TE Connectivity AMP ConnectorsIn Stock: 7491840120-4 Datasheet

Current PartRFQ

A63-112-431P112

Mercury United Electronics, Inc.In Stock: 1093A63-112-431P112 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1840120-4 is constrained by the following critical parameters that must align between the main part and any substitute:

Mandatory Alignment Parameters:

• Connector Type: RJ45
• Applications: 10/100 Base-T, AutoMDIX
• Mounting Type: Through Hole
• Termination: Solder
• Operating Temperature Range: 0°C ~ 70°C
• Shielding: Shielded
• Contact Finish: Gold
• Number of Cores per Jack: 4

Flexible Parameters (Allowable Variation):

• Number of Ports: The main part features 2 ports; substitutes may have different port counts depending on application requirements
• Orientation: The main part uses 90° right-angle; substitutes may use alternative orientations
• Height Above Board: Physical clearance requirements may differ
• LED Color Configuration: Indicator color schemes may vary
• Housing Material: Alternative polyester-based materials acceptable
• Shield Material: Alternative conductive materials acceptable
• Contact Material: Alternative phosphor bronze or copper alloy compositions acceptable

The identified substitute A63-112-431P112 from Mercury United Electronics, Inc. maintains core electrical compatibility through shared RJ45 connector type, 10/100 Base-T AutoMDIX application support, through-hole solder termination, and gold contact finish. However, this substitute operates as a single-port configuration versus the dual-port main part, requiring design-level evaluation for port count requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The main part 1840120-4 carries obsolete status, indicating discontinued manufacturing and limited long-term availability. The substitute A63-112-431P112 maintains active product status with confirmed inventory availability (987 pieces in stock), supporting ongoing procurement requirements.

Compliance and Certification: The substitute part A63-112-431P112 provides superior regulatory alignment through ROHS3 compliance and REACH unaffected status, compared to the main part's undefined compliance posture. Both parts share identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications, maintaining export and tariff consistency.

Electrical Compatibility: Both parts support identical 10/100 Base-T AutoMDIX applications with matching operating temperature ranges (0°C ~ 70°C), four-core jack configurations, and gold-finished contacts. The substitute's copper alloy contact material and flash finish thickness represent acceptable alternatives to the main part's phosphor bronze with 50.0µin plating.

Physical Integration Factors: The substitute operates with vertical orientation and reduced height (0.664" versus 0.992"), requiring PCB layout reassessment. The single-port configuration necessitates design modification if dual-port functionality is required in the application. Packaging format differs (tray versus unspecified), affecting supply chain handling procedures.

Frequently Asked Questions (FAQ)

Q: Can A63-112-431P112 directly replace 1840120-4 in existing designs?

A: Direct replacement requires design-level evaluation. Both parts maintain RJ45 connector type, 10/100 Base-T AutoMDIX support, through-hole solder termination, and gold contact finish. However, the substitute's single-port configuration, vertical orientation, and reduced board height (0.664" versus 0.992") necessitate PCB layout verification and mechanical clearance confirmation.

Q: What are the critical parameters that must match for substitution?

A: Substitution requires alignment on connector type (RJ45), application support (10/100 Base-T AutoMDIX), mounting method (through-hole), termination type (solder), operating temperature range (0°C ~ 70°C), shielding presence, contact finish (gold), and core count per jack (4). Port count, orientation, and height represent flexible parameters subject to application requirements.

Q: How does the contact finish thickness difference affect performance?

A: The main part specifies 50.0µin (1.27µm) gold plating, while the substitute uses flash thickness. Flash plating provides minimal gold coverage for corrosion protection and contact conductivity. This difference may impact long-term reliability in high-cycle mating environments; application-specific durability requirements should guide selection.

Q: What compliance advantages does the substitute offer?

A: The substitute A63-112-431P112 provides ROHS3 compliance and REACH unaffected status, supporting modern regulatory requirements. The main part's obsolete status and undefined compliance posture limit suitability for new product designs subject to environmental regulations.

Q: Are there packaging or supply chain differences?

A: The main part 1840120-4 shows unspecified packaging with 655 pieces available. The substitute A63-112-431P112 ships in tray packaging with 987 pieces in stock. Tray packaging typically supports automated assembly processes and offers improved handling efficiency compared to bulk packaging.

Q: Can the substitute accommodate the same PCB footprint?

A: No. The substitute's vertical orientation and reduced height (0.664" versus 0.992") differ from the main part's 90° right-angle configuration. PCB footprint modification is required, including through-hole repositioning and clearance zone adjustment to accommodate the substitute's physical dimensions.