MBRB3045CT Equivalent & Substitute Parts

Part Overview

The MBRB3045CT is a Schottky diode array manufactured by SMC Diode Solutions, configured as a 1 Pair Common Cathode device rated for 45 V DC reverse voltage. This surface mount component is housed in a TO-263-3 D2PAK package and is classified as an Active product with full RoHS3 compliance. The device operates across a junction temperature range of -55°C to 150°C and exhibits fast recovery characteristics suitable for high-frequency rectification applications. Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as automotive qualification or enhanced current ratings.

Substiute Parts

MBRB3045CT

SMC Diode SolutionsIn Stock: 2553MBRB3045CT Datasheet

Current PartRFQ

RBQ30NS45AFHTL

Rohm SemiconductorIn Stock: 2906RBQ30NS45AFHTL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRB3045CT is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 45 V
• Voltage - Forward (Vf) (Max) @ If: 650 mV @ 15 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 200 µA @ 45 V
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute part RBQ30NS45AFHTL meets all mandatory matching parameters. Additional attributes such as automotive qualification (AEC-Q101) and enhanced current rating (30A per diode) represent supplementary capabilities that do not preclude substitution but provide enhanced performance margins for specific applications.

Parameter Comparison

Engineering Selection Recommendations

MBRB3045CT (SMC Diode Solutions):

• Primary selection for standard industrial applications
• Active product status with established supply chain
• RoHS3 compliant and MSL 1 rated for unrestricted handling
• Suitable for applications where automotive qualification is not required

RBQ30NS45AFHTL (Rohm Semiconductor):

• Equivalent substitute with identical core electrical and mechanical specifications
• Automotive-grade component with AEC-Q101 qualification
• Specified current rating of 30 A per diode provides enhanced performance margin
• Active product status with confirmed inventory availability
• RoHS3 compliant and MSL 1 rated for unrestricted handling
• Appropriate for automotive applications or designs requiring automotive-qualified components

Both parts are Active products with full regulatory compliance. Selection between them is determined by application requirements: standard industrial use favors the MBRB3045CT, while automotive applications or designs requiring AEC-Q101 qualification favor the RBQ30NS45AFHTL.

Frequently Asked Questions (FAQ)

Q: Can the RBQ30NS45AFHTL replace the MBRB3045CT in existing designs?

A: Yes. The RBQ30NS45AFHTL is a parametric equivalent with identical diode configuration, voltage rating, forward voltage characteristics, switching speed, reverse leakage, package type, and mounting method. No circuit modifications are required.

Q: What is the significance of the 30 A current rating on the RBQ30NS45AFHTL?

A: The RBQ30NS45AFHTL specifies a 30 A average rectified current per diode. The MBRB3045CT does not specify this parameter in the provided data. This represents a supplementary capability of the Rohm device and does not affect substitution eligibility. Applications operating below the thermal and current limits of either device will function identically.

Q: Are both parts suitable for high-temperature applications?

A: Both parts operate to a maximum junction temperature of 150°C. The MBRB3045CT specifies a range of -55°C to 150°C, while the RBQ30NS45AFHTL specifies 150°C as the maximum. Both are suitable for the same thermal operating window.

Q: What is the difference between the packaging formats listed?

A: The MBRB3045CT is supplied in Tape & Reel (TR) format. The RBQ30NS45AFHTL is supplied in Cut Tape (CT) and Digi-Reel® format. Both use the identical TO-263-3 D2PAK package footprint. Packaging format affects procurement and handling but not electrical or mechanical compatibility.

Q: Why is the RBQ30NS45AFHTL qualified to AEC-Q101?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. The RBQ30NS45AFHTL meets this qualification, making it suitable for automotive applications. The MBRB3045CT does not carry this designation, though it remains suitable for non-automotive applications.

Q: Are there any compliance differences between these parts?

A: Both parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The MBRB3045CT is REACH Affected, while the RBQ30NS45AFHTL is REACH Unaffected. Both carry EAR99 ECCN classification. These differences do not affect functional substitution.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts use the identical TO-263-3 D2PAK package with the same pinout and footprint. No PCB layout modifications are required for substitution.