ARJ11B-MASAS-LU2 Equivalent & Substitute Parts

Part Overview

The ARJ11B-MASAS-LU2 is a 1 Port RJ45 Through Hole modular connector manufactured by Abracon LLC, designed for 10/100 Base-T Ethernet applications with AutoMDIX support. This connector features a 90° right-angle orientation, solder termination, and board lock functionality. The part is currently active in production with 1067 units in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to component availability, supply chain considerations, or design flexibility within the same application category.

Key Parameters

Parameter	Value
Connector Type	RJ45
Number of Ports	1
Applications	10/100 Base-T, AutoMDIX
Mounting Type	Through Hole
Orientation	90° Angle (Right)
Termination	Solder
Shielding	Shielded, EMI Finger
Features	Board Lock
Operating Temperature	0°C ~ 70°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ARJ11B-MASAS-LU2 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Connector Type & Port Configuration: RJ45, single port
Application Specification: 10/100 Base-T with AutoMDIX
Mounting & Orientation: Through hole, 90° right-angle
Electrical Interface: Solder termination with 4 cores per jack
Shielding & EMI Protection: Shielded construction with EMI finger
Mechanical Features: Board lock functionality
Environmental Compliance: ROHS3 compliant, MSL 1, operating range 0°C to 70°C

Two substitute parts meet these criteria: ARJ11B-MASAA-MU2 (same manufacturer, alternative packaging) and A63-113-300P422 (alternative manufacturer, Mercury United Electronics).

Parameter Comparison

Parameter	ARJ11B-MASAS-LU2	ARJ11B-MASAA-MU2	A63-113-300P422
Manufacturer	Abracon LLC	Abracon LLC	Mercury United Electronics, Inc.
Connector Type	RJ45	RJ45	RJ45
Number of Ports	1	1	1
Applications	10/100 Base-T, AutoMDIX	10/100 Base-T, AutoMDIX	10/100 Base-T, AutoMDIX
Mounting Type	Through Hole	Through Hole	Through Hole
Orientation	90° Angle (Right)	90° Angle (Right)	90° Angle (Right)
Termination	Solder	Solder	Solder
Height Above Board	0.545" (13.84mm)	0.545" (13.84mm)	0.531" (13.49mm)
Number of Cores per Jack	4	4	4
Shielding	Shielded, EMI Finger	Shielded, EMI Finger	Shielded, EMI Finger
Features	Board Lock	Board Lock	Board Lock
Tab Direction	Down	Down	Down
Contact Finish	Gold	Gold	Gold
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040
Inventory Status	1067 Pcs New Original In Stock	827 Pcs New Original In Stock	709 Pcs New Original In Stock

Engineering Selection Recommendations

All three parts—ARJ11B-MASAS-LU2, ARJ11B-MASAA-MU2, and A63-113-300P422—are active products with ROHS3 compliance and REACH unaffected status, qualifying them for equivalent use in 10/100 Base-T Ethernet applications.

ARJ11B-MASAS-LU2 to ARJ11B-MASAA-MU2: Both are Abracon LLC products within the same ARJ11B series. The primary difference is packaging format (standard versus tray). Mechanical and electrical specifications are identical, including height above board (0.545"), contact finish thickness (6.00µin), and all functional parameters. This substitution presents no technical barriers.

ARJ11B-MASAS-LU2 to A63-113-300P422: This cross-manufacturer substitution involves Mercury United Electronics as the alternative supplier. All critical electrical and mechanical parameters align, including connector type, port configuration, application support, mounting method, orientation, shielding, and board lock features. The height above board differs by 0.014" (0.35mm), which falls within typical PCB design tolerances for through-hole connectors. Contact finish thickness is higher on the A63-113-300P422 (15.0µin versus 6.00µin), providing additional contact durability. Both parts maintain identical operating temperature ranges and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can ARJ11B-MASAA-MU2 be used as a direct replacement for ARJ11B-MASAS-LU2?

A: Yes. Both parts are manufactured by Abracon LLC within the same ARJ11B series and share identical electrical and mechanical specifications. The only difference is packaging format. No design or assembly modifications are required.

Q: Is A63-113-300P422 compatible with designs specified for ARJ11B-MASAS-LU2?

A: Yes. The A63-113-300P422 meets all functional and mechanical requirements for 10/100 Base-T Ethernet applications with AutoMDIX. The 0.014" height difference is within standard PCB design tolerances for through-hole connectors. Both parts feature identical connector type, port configuration, solder termination, shielding, board lock, and compliance certifications.

Q: What is the difference in contact finish thickness between these parts?

A: ARJ11B-MASAS-LU2 and ARJ11B-MASAA-MU2 specify 6.00µin (0.152µm) contact finish thickness. A63-113-300P422 specifies 15.0µin (0.38µm). The higher thickness on the Mercury part provides increased contact durability and wear resistance, with no impact on electrical performance for standard Ethernet applications.

Q: Are all three parts RoHS3 compliant?

A: Yes. ARJ11B-MASAS-LU2, ARJ11B-MASAA-MU2, and A63-113-300P422 are all ROHS3 compliant with MSL 1 rating and REACH unaffected status.

Q: What packaging formats are available?

A: ARJ11B-MASAS-LU2 is supplied in standard packaging. ARJ11B-MASAA-MU2 and A63-113-300P422 are supplied in tray packaging. Packaging format does not affect component functionality or performance.

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