MBR2045CTP Equivalent & Substitute Parts

Part Overview

The MBR2045CTP is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode arrangement with a maximum reverse voltage rating of 45 V and average rectified current of 10 A per diode. The component is packaged in a TO-220-3 Isolated Tab through-hole configuration and is classified as obsolete.

Due to its obsolete product status, identifying equivalent and substitute parts is necessary for ongoing design support, production continuity, and system maintenance. The substitute parts listed maintain electrical compatibility within the specified parameter ranges while offering active product status or enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	10	A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100 µA @ 45 V	—
Operating Temperature - Junction	-55°C ~ 150°C	—
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Isolated Tab	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the MBR2045CTP is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io) (per Diode): 10 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-3 variant

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Lower values indicate improved performance
Current - Reverse Leakage @ Vr: Lower values indicate improved performance
Operating Temperature - Junction: Extended ranges are acceptable
Product Status: Active status preferred over obsolete
Compliance Certifications: Additional certifications (AEC-Q101) are acceptable

The three substitute parts listed meet the mandatory electrical and mechanical parameters while offering either equivalent or superior performance characteristics and improved product availability.

Parameter Comparison

Parameter	MBR2045CTP (Main)	VT2045C-M3/4W	MBRF2045CT	STPS20L45CFP
Manufacturer	Diodes Incorporated	Vishay General Semiconductor - Diodes Division	Diodes Incorporated	STMicroelectronics
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	60 V	45 V
Current - Average Rectified (Io) (per Diode)	10 A	10 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 10 A	580 mV @ 10 A	640 mV @ 10 A	550 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	2 mA @ 45 V	100 µA @ 60 V	200 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C	-40°C ~ 150°C	-55°C ~ 150°C	150°C (Max)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Isolated Tab	TO-220-3	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack
Product Status	Obsolete	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Qualification	Not specified	AEC-Q101	AEC-Q101	Not specified

Engineering Selection Recommendations

VT2045C-M3/4W (Vishay General Semiconductor - Diodes Division)

This substitute offers active product status with AEC-Q101 automotive qualification. The forward voltage is reduced to 580 mV @ 10 A, indicating improved efficiency compared to the MBR2045CTP. The reverse leakage current is elevated at 2 mA @ 45 V. The operating temperature range is narrower (-40°C ~ 150°C) compared to the main part. This option is suitable for applications requiring automotive-grade components with active supply chain support.

MBRF2045CT (Diodes Incorporated)

This substitute maintains the same manufacturer as the main part and shares identical diode configuration and current ratings. The reverse voltage rating is increased to 60 V, providing additional design margin. The forward voltage is 640 mV @ 10 A, and reverse leakage remains at 100 µA @ 60 V. The operating temperature range matches the main part (-55°C ~ 150°C). AEC-Q101 automotive qualification is included. However, this part is also classified as obsolete. This option is suitable for direct replacement in existing designs where higher voltage margin is beneficial.

STPS20L45CFP (STMicroelectronics)

This substitute offers active product status with the lowest forward voltage at 550 mV @ 10 A, indicating superior efficiency. The reverse voltage rating matches the main part at 45 V. The reverse leakage current is elevated at 200 µA @ 45 V. The operating temperature specification is provided as maximum only (150°C). RoHS3 compliance is confirmed. This option is suitable for applications prioritizing power efficiency and requiring active component availability.

Frequently Asked Questions (FAQ)

Q: Can the VT2045C-M3/4W be used as a direct replacement for the MBR2045CTP?

A: Yes. Both components share identical diode configuration (1 Pair Common Cathode), technology (Schottky), voltage rating (45 V), and current rating (10 A per diode). Both are packaged in TO-220-3 through-hole configurations. The VT2045C-M3/4W offers active product status and AEC-Q101 qualification. The narrower operating temperature range (-40°C ~ 150°C versus -55°C ~ 150°C) must be verified against application requirements.

Q: What is the difference between the MBRF2045CT and the MBR2045CTP?

A: The MBRF2045CT has a higher reverse voltage rating (60 V versus 45 V), providing additional voltage margin. Both share the same manufacturer, diode configuration, current rating, and operating temperature range. The MBRF2045CT includes AEC-Q101 automotive qualification. Both parts are classified as obsolete.

Q: Why does the STPS20L45CFP have a lower forward voltage than the MBR2045CTP?

A: Forward voltage variation is a normal characteristic of Schottky diodes from different manufacturers and process technologies. The STPS20L45CFP's lower forward voltage (550 mV @ 10 A versus 650 mV @ 10 A) indicates improved efficiency and reduced power dissipation in the same application. This is a performance advantage, not a compatibility issue.

Q: Are there package differences between these substitutes?

A: All substitutes use TO-220-3 through-hole packaging. The MBR2045CTP and MBRF2045CT specify "Isolated Tab" configurations, while the VT2045C-M3/4W and STPS20L45CFP use standard TO-220-3 and TO-220-3 Full Pack variants. Isolated Tab and Full Pack configurations differ in thermal and electrical isolation characteristics. Verify mounting and thermal management compatibility with your PCB design.

Q: Which substitute has the best long-term availability?

A: The VT2045C-M3/4W and STPS20L45CFP are both classified as active products, indicating ongoing manufacturing and supply chain support. The MBRF2045CT is obsolete. For new designs or long-term production, active-status components are preferred.

Q: Can I use the MBRF2045CT in place of the MBR2045CTP if my circuit operates below 45 V?

A: Yes. The MBRF2045CT's higher voltage rating (60 V) is compatible with circuits designed for 45 V operation. Higher voltage ratings do not create compatibility issues in lower-voltage applications. However, verify that the increased reverse leakage current specification (100 µA @ 60 V) does not affect circuit performance.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Components meeting this qualification have undergone rigorous testing for reliability, temperature cycling, and performance consistency. The VT2045C-M3/4W and MBRF2045CT carry this qualification, making them suitable for automotive and high-reliability applications.

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