MBRS2045CT Equivalent & Substitute Parts

Part Overview

The MBRS2045CT is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as 1 pair common cathode with a maximum reverse voltage of 45V and average rectified current of 20A per diode. The component is packaged in TO-263-3 (D2PAK) surface mount configuration and is currently in active product status with RoHS3 compliance.

Substitute parts are necessary when the primary component becomes unavailable, when alternative compliance certifications are required, or when application requirements permit operation within the electrical and mechanical parameters of equivalent devices.

Substiute Parts

MBRS2045CT

Taiwan Semiconductor CorporationIn Stock: 2345MBRS2045CT Datasheet

Current PartRFQ

MBRB2045CT

Vishay General Semiconductor - Diodes DivisionIn Stock: 45509MBRB2045CT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRS2045CT is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode configuration must be 1 pair common cathode
• Technology must be Schottky
• Maximum reverse voltage (Vr) must be 45V or greater
• Average rectified current (Io) per diode must be 20A or greater
• Fast recovery speed characteristic (≤ 500ns, > 200mA)
• Reverse leakage current must not exceed 100 µA @ 45V

Mechanical Compatibility Requirements:

• Package type must be TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting type must be surface mount

Compliance Considerations:

• RoHS status and REACH compliance may vary between substitutes
• Product status (active vs. obsolete) affects long-term availability

The MBRB2045CT is identified as a substitute part; however, it operates at reduced current capacity (10A per diode versus 20A), which represents a downgrade in electrical performance and does not meet the current requirement for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: MBRS2045CT

The MBRS2045CT remains the preferred component selection. It maintains active product status, ensuring continued availability and manufacturer support. The part is RoHS3 compliant, meeting current environmental and regulatory requirements. The 20A average rectified current per diode satisfies full-capacity applications without derating.

Substitute Consideration: MBRB2045CT

The MBRB2045CT is listed as an available substitute but presents significant limitations:

• Current Capacity Limitation: The 10A average rectified current per diode represents a 50% reduction from the main part specification. Applications requiring 20A operation cannot use this substitute without circuit redesign or parallel configuration.
• Compliance Status: RoHS non-compliance restricts use in applications subject to RoHS regulations.
• Product Status: Obsolete status indicates discontinued manufacturing, limiting future availability and supply reliability.

The MBRB2045CT is suitable only for applications with current requirements of 10A or less per diode and where RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can MBRB2045CT directly replace MBRS2045CT in all applications?

A: No. The MBRB2045CT operates at 10A average rectified current per diode, while the MBRS2045CT is rated for 20A. Direct replacement is only possible in applications designed for 10A or lower current operation. Applications requiring 20A operation will experience component overstress and potential failure.

Q: Are the package dimensions identical between MBRS2045CT and MBRB2045CT?

A: Yes. Both components use the TO-263-3 (D2PAK) package with 2 leads plus tab configuration. PCB footprints and thermal management layouts are compatible.

Q: What is the impact of the forward voltage difference between these parts?

A: The MBRB2045CT exhibits lower forward voltage (570 mV @ 10A) compared to the MBRS2045CT (950 mV @ 20A). These measurements are taken at different current levels and are not directly comparable. Forward voltage characteristics must be evaluated at the actual operating current of the application.

Q: Why is MBRB2045CT listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. While inventory may remain available through distributors, long-term supply cannot be guaranteed. New designs should specify the active MBRS2045CT.

Q: Does the wider operating temperature range of MBRB2045CT (-65 to 150°C versus -55 to 150°C) provide an advantage?

A: The extended lower temperature limit of MBRB2045CT provides operational capability at -65°C, compared to -55°C for MBRS2045CT. This advantage applies only to applications requiring operation below -55°C and where the 10A current limitation is acceptable.

Q: Are there compliance differences between these parts?

A: Yes. MBRS2045CT is RoHS3 compliant, while MBRB2045CT is RoHS non-compliant. Applications subject to RoHS regulations must use MBRS2045CT or equivalent RoHS-compliant alternatives.

Q: Can two MBRB2045CT diodes be paralleled to achieve 20A capacity?

A: Paralleling Schottky diodes requires careful circuit design to ensure balanced current distribution. This approach introduces additional complexity, cost, and PCB area requirements. The single MBRS2045CT component is the preferred solution for 20A applications.