RB080AR-40T7R Equivalent & Substitute Parts

Part Overview

The RB080AR-40T7R is a Schottky rectifier diode manufactured by Rohm Semiconductor, designed for surface mount applications in the 0805 (2012 Metric) package. This component operates at a maximum reverse voltage of 40V with an average rectified current rating of 4A and features a forward voltage drop of 630 mV at 4A. The device is classified as Active product status and is widely used in power conversion, rectification, and switching applications where low forward voltage and fast recovery characteristics are required.

Equivalent and substitute parts are necessary when the primary component becomes unavailable, when supply chain optimization is required, or when design flexibility across multiple qualified sources is needed while maintaining electrical and mechanical compatibility.

Substiute Parts

RB080AR-40T7R

Rohm SemiconductorIn Stock: 7446RB080AR-40T7R Datasheet

Current PartRFQ

SB54AFC_R1_00001

Panjit International Inc.In Stock: 21212SB54AFC_R1_00001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RB080AR-40T7R is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40V
• Technology: Must be Schottky type
• Mounting Type: Must be Surface Mount
• Current - Average Rectified (Io): Must equal or exceed 4A
• Moisture Sensitivity Level (MSL): Must be 1 (Unlimited) or equivalent

Performance Parameters:

• Voltage - Forward (Vf) (Max) @ If: Lower or equal values are acceptable
• Reverse Recovery Time (trr): Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: Lower values indicate superior performance

Package Considerations:

• Surface mount package compatibility depends on PCB layout and assembly equipment capability
• Package footprint differences may require design layout modifications

The substitute part SB54AFC_R1_00001 meets all mandatory compatibility criteria and demonstrates equivalent or superior electrical performance across all specified parameters.

Parameter Comparison

Engineering Selection Recommendations

Electrical Compatibility: The SB54AFC_R1_00001 substitute part demonstrates full electrical compatibility with the RB080AR-40T7R across all critical parameters. The substitute part's higher current rating (5A versus 4A) and superior forward voltage characteristics (540 mV @ 5A versus 630 mV @ 4A) indicate enhanced performance capability. The lower reverse leakage current (100 µA versus 200 µA) represents improved device quality.

Regulatory and Compliance Status: Both parts maintain identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. The substitute part carries RoHS3 compliance and REACH Unaffected status, confirming environmental and regulatory alignment. Both components feature MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Product Availability and Supply Chain: Both parts maintain Active product status. The substitute part demonstrates higher inventory availability (21,114 pieces versus 7,414 pieces), supporting supply chain continuity and procurement flexibility.

Package Consideration: The primary distinction between these parts is the package format. The RB080AR-40T7R uses a 0805 (2012 Metric) DSN2012-2 package, while the SB54AFC_R1_00001 uses a DO-221AC (SMA Flat Leads) SMAF-C package. This package difference requires PCB layout and assembly process evaluation to determine substitution feasibility in specific applications.

Frequently Asked Questions (FAQ)

Q: Can the SB54AFC_R1_00001 directly replace the RB080AR-40T7R without PCB modifications?

A: Electrical substitution is valid. However, the package format differs (0805 2012 Metric versus DO-221AC SMA Flat Leads), requiring PCB footprint and layout assessment. Direct board-level substitution without design changes is not possible due to different package geometries.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are: Voltage - DC Reverse (Vr) (Max) of 40V, Schottky technology, Surface Mount mounting type, and Current - Average Rectified (Io) rating of 4A or higher. Both parts meet these requirements.

Q: Does the substitute part's higher current rating (5A) affect circuit operation?

A: No. A higher current rating indicates the substitute part can safely handle the 4A application requirement with additional margin. This represents improved performance headroom and does not negatively impact circuit operation.

Q: Are there any thermal or reliability differences between these parts?

A: Both parts share identical maximum junction operating temperature (150°C) and MSL 1 (Unlimited) moisture sensitivity rating. The substitute part's lower reverse leakage current (100 µA versus 200 µA) indicates superior leakage performance characteristics.

Q: What compliance certifications apply to both parts?

A: Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. The substitute part additionally carries RoHS3 compliance and REACH Unaffected status.

Q: How do the forward voltage characteristics compare?

A: The substitute part demonstrates superior forward voltage performance at 540 mV @ 5A compared to the main part at 630 mV @ 4A. This represents lower power dissipation and improved efficiency in rectification applications.

Q: What is the significance of the different capacitance values?

A: The substitute part exhibits higher capacitance (159 pF versus 110 pF at 10V, 1MHz). This parameter is provided for reference and does not prevent substitution in standard rectification applications.