ARJ11D-MASE-A-B-FMU2 Equivalent & Substitute Parts

Part Overview

The ARJ11D-MASE-A-B-FMU2 is a 1-port RJ45 modular connector manufactured by Abracon LLC, designed for 10/100 Base-T Ethernet applications with AutoMDIX capability. This through-hole mounted connector features a 90° right-angle orientation, shielded design with EMI finger protection, and integrated board lock mechanism. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits equivalent functionality within the same electrical and mechanical specifications.

Substiute Parts

ARJ11D-MASE-A-B-FMU2

Abracon LLCIn Stock: 1070ARJ11D-MASE-A-B-FMU2 Datasheet

Current PartRFQ

ARJ11D-MASE-A-B-EMU2

Abracon LLCIn Stock: 1151ARJ11D-MASE-A-B-EMU2 Datasheet

MFR RecommendedRFQ

A63-113-231N435

Mercury United Electronics, Inc.In Stock: 874A63-113-231N435 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ARJ11D-MASE-A-B-FMU2 is determined by strict equivalence across the following critical parameters:

• Connector Type & Port Configuration: RJ45, single port
• Electrical Application: 10/100 Base-T with AutoMDIX support
• Mechanical Interface: Through-hole mounting, 90° right-angle orientation, solder termination
• Shielding & EMI Protection: Shielded design with EMI finger
• Environmental Compliance: ROHS3 compliance, MSL 1 rating, REACH unaffected status
• Functional Features: Board lock mechanism, gold contact finish

Two substitute parts meet these criteria: ARJ11D-MASE-A-B-EMU2 (same manufacturer, different packaging) and A63-113-231N435 (alternative manufacturer, Mercury United Electronics, Inc.).

Parameter Comparison

Engineering Selection Recommendations

ARJ11D-MASE-A-B-EMU2 is the primary substitute for ARJ11D-MASE-A-B-FMU2. Both parts are manufactured by Abracon LLC and share identical electrical, mechanical, and environmental specifications. The only difference is packaging format (Tray vs. unspecified for the main part). This substitute maintains full compatibility with existing PCB designs and assembly processes.

A63-113-231N435 is an alternative substitute manufactured by Mercury United Electronics, Inc. This part meets all critical functional and compliance requirements. The height above board differs by 0.014" (0.35mm), and contact finish thickness is thicker at 15.0µin versus 6.00µin. Both parts maintain ROHS3 compliance, MSL 1 rating, and identical electrical performance for 10/100 Base-T applications. The mechanical height variance is within typical PCB layout tolerances for right-angle connectors.

Selection between substitutes should be based on availability, lead time, and packaging requirements. Both alternatives are active products with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can ARJ11D-MASE-A-B-EMU2 be used as a direct replacement for ARJ11D-MASE-A-B-FMU2?

A: Yes. Both parts are identical in electrical performance, mechanical dimensions, and environmental compliance. The only difference is packaging format. No PCB redesign or assembly process modification is required.

Q: What is the mechanical height difference between ARJ11D-MASE-A-B-FMU2 and A63-113-231N435?

A: ARJ11D-MASE-A-B-FMU2 has a height of 0.545" (13.84mm), while A63-113-231N435 measures 0.531" (13.49mm). This 0.014" (0.35mm) difference is within standard PCB layout tolerances for right-angle connectors and does not affect electrical performance or mechanical fit.

Q: Are there compliance differences between the main part and substitutes?

A: No. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) ratings. All share identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications.

Q: Does the contact finish thickness difference affect performance?

A: No. Both 6.00µin (0.152µm) and 15.0µin (0.38µm) gold finishes meet 10/100 Base-T electrical requirements. The thicker finish on A63-113-231N435 provides additional durability without changing electrical characteristics.

Q: Can these parts be mixed in the same assembly?

A: Yes. All three parts are electrically and mechanically compatible for 10/100 Base-T applications. Mixed usage does not create compatibility issues, though maintaining single-source parts per design is a standard manufacturing practice.

Q: What is the difference between FMU2 and EMU2 packaging?

A: The primary difference is packaging format. ARJ11D-MASE-A-B-FMU2 uses unspecified packaging, while ARJ11D-MASE-A-B-EMU2 uses Tray packaging. Both contain identical connector components with no functional differences.