MBR2545CT Equivalent & Substitute Parts

Part Overview

The MBR2545CT is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 15 A average rectified current per diode. Manufactured by Vishay General Semiconductor - Diodes Division, this through-hole TO-220-3 package component is classified as obsolete. Due to its obsolete status and limited availability of the original specification, equivalent and substitute parts are necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io) (per Diode)	15 A
Voltage - Forward (Vf) (Max) @ If	820 mV @ 30 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MBR2545CT are grouped based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io) (per Diode): 15 A
Mounting Type: Through Hole
Package / Case: TO-220-3

Parametric Equivalents maintain all primary criteria and are direct functional replacements with identical electrical performance specifications.

Direct Manufacturer Parts meet all primary criteria but may have minor variations in forward voltage characteristics or reverse leakage current within acceptable operating ranges for the same application class.

Manufacturer Recommended Parts satisfy the primary electrical and mechanical criteria while offering improved product status (Active vs. Obsolete) or enhanced compliance certifications (RoHS3 Compliant).

Parts that deviate from the 15 A current rating or employ alternative diode technologies (Super Barrier, alternative Schottky variants) are included only when they maintain the 45 V voltage rating and TO-220-3 package, as they represent functional alternatives for applications with different current requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Product Status	RoHS Status
MBR2545CT	Vishay	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 150°C	Obsolete	Non-compliant
MBR2545CT-E3/45	Vishay	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 150°C	Active	ROHS3 Compliant
VS-MBR2545CT-M3	Vishay	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 150°C	Active	ROHS3 Compliant
25CTQ045	Vishay	45 V	15 A	560 mV @ 15 A	1.75 mA @ 45 V	-55°C ~ 150°C	Obsolete	Non-compliant
MBR3045CT	Good-Ark	45 V	30 mA	Not specified	200 nA @ 45 V	Not specified	Active	ROHS3 Compliant
MBR3045CTP	Diodes Inc.	45 V	15 A	650 mV @ 15 A	200 µA @ 45 V	-65°C ~ 150°C	Obsolete	ROHS3 Compliant
SBR3045CT	Diodes Inc.	45 V	15 A	550 mV @ 15 A	500 µA @ 45 V	-65°C ~ 150°C	Active	ROHS3 Compliant
MBR2545CT-BP	Micro Commercial Co	45 V	25 A	750 mV @ 15 A	1 mA @ 45 V	-55°C ~ 150°C	Active	Not specified
MBR2545CTG	onsemi	45 V	15 A	620 mV @ 15 A	200 µA @ 45 V	-65°C ~ 175°C	Active	ROHS3 Compliant
STPS2545CT	STMicroelectronics	45 V	12.5 A	570 mV @ 12.5 A	125 µA @ 45 V	-65°C ~ 175°C	Active	ROHS3 Compliant
STPS3045CT	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	-65°C ~ 200°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Substitutes (Direct Replacements):

MBR2545CT-E3/45 and VS-MBR2545CT-M3 are the primary recommended substitutes. Both are manufactured by Vishay and maintain identical electrical specifications to the original MBR2545CT while offering Active product status and ROHS3 compliance. These parts provide the most direct functional replacement with no design modifications required.

Active Product Alternatives:

MBR2545CTG (onsemi) and STPS3045CT (STMicroelectronics) are Active products that meet the 45 V / 15 A specification with ROHS3 compliance. MBR2545CTG extends the maximum junction temperature to 175°C. STPS3045CT extends to 200°C maximum junction temperature, providing enhanced thermal performance for high-temperature applications.

Current-Rated Alternatives:

STPS2545CT (STMicroelectronics) is rated for 12.5 A average rectified current, which is below the 15 A specification of the original part. This part is suitable only for applications where the actual operating current does not exceed 12.5 A.

MBR2545CT-BP (Micro Commercial Co) is rated for 25 A average rectified current, exceeding the original 15 A specification. This part provides additional current margin and is suitable for applications requiring higher current capacity within the same 45 V voltage class.

Obsolete Parts:

25CTQ045 and MBR3045CTP are classified as obsolete. While 25CTQ045 maintains the 45 V / 15 A specification, it exhibits higher reverse leakage current (1.75 mA vs. 200 µA). MBR3045CTP features an isolated tab variant (ITO-220S package) and is rated for 15 A, but its obsolete status limits its suitability for new designs.

Technology Variant:

SBR3045CT employs Super Barrier technology rather than standard Schottky. It maintains 45 V / 15 A ratings with lower forward voltage (550 mV @ 15 A) and is Active with ROHS3 compliance. This part is suitable for applications prioritizing reduced forward voltage drop.

Current-Limited Alternative:

MBR3045CT (Good-Ark) is rated for only 30 mA average rectified current and is not suitable as a direct substitute for 15 A applications. This part represents a different product class.

Frequently Asked Questions (FAQ)

Q: Can MBR2545CT-E3/45 be used as a direct replacement for MBR2545CT?

A: Yes. MBR2545CT-E3/45 is a parametric equivalent manufactured by Vishay with identical electrical specifications (45 V, 15 A, Schottky, 1 Pair Common Cathode, TO-220-3). The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. Non-compliant). No circuit modifications are required.

Q: What is the difference between MBR2545CT-E3/45 and VS-MBR2545CT-M3?

A: Both parts are Vishay parametric equivalents with identical electrical specifications and Active product status with ROHS3 compliance. The designation difference reflects internal Vishay part numbering conventions. Both are suitable direct replacements for the original MBR2545CT.

Q: Can STPS3045CT replace MBR2545CT in all applications?

A: STPS3045CT meets the 45 V / 15 A specification and TO-220-3 package requirement. It offers improved maximum junction temperature (200°C vs. 150°C) and lower forward voltage (570 mV @ 15 A vs. 820 mV @ 30 A). It is suitable for direct replacement in applications where the original specifications are met. Verify forward voltage characteristics if the application is sensitive to voltage drop.

Q: Why is MBR3045CT listed as a substitute if it is only rated for 30 mA?

A: MBR3045CT is included in the substitute list but is not a functional equivalent for 15 A applications. It represents a different product class (small signal vs. power rectifier) and is suitable only for applications with current requirements below 30 mA. It should not be selected for the standard MBR2545CT application.

Q: What is the advantage of MBR2545CT-BP over the original MBR2545CT?

A: MBR2545CT-BP is rated for 25 A average rectified current, providing 67% additional current capacity within the same 45 V voltage rating and TO-220-3 package. It is Active with improved availability. It is suitable for applications requiring higher current margin or where future design upgrades may increase current demand.

Q: Is SBR3045CT compatible with MBR2545CT applications?

A: SBR3045CT maintains the 45 V / 15 A specification and TO-220-3 package. It employs Super Barrier technology, resulting in lower forward voltage (550 mV @ 15 A vs. 820 mV @ 30 A). It is compatible with applications where reduced forward voltage drop is beneficial. Verify that the application does not depend on specific Schottky diode characteristics if technology substitution is considered.

Q: Can STPS2545CT be used if the application requires 15 A?

A: STPS2545CT is rated for 12.5 A average rectified current, which is below the 15 A requirement. It is not suitable for applications requiring the full 15 A specification. Use this part only if the actual operating current in the application does not exceed 12.5 A.

Q: What packaging differences exist between the substitute parts?

A: All listed substitute parts use the TO-220-3 through-hole package, with the exception of MBR3045CTP, which uses an isolated tab variant (ITO-220S package). The isolated tab variant provides electrical isolation between the tab and the diode cathode, which may be required in specific thermal management or safety-critical applications. Standard TO-220-3 parts are suitable for most applications.

Q: Are all substitute parts RoHS3 compliant?

A: MBR2545CT-E3/45, VS-MBR2545CT-M3, MBR3045CTP, SBR3045CT, MBR2545CTG, STPS2545CT, and STPS3045CT are ROHS3 compliant. MBR2545CT-BP and MBR3045CT do not specify RoHS status in the provided data. The original MBR2545CT and 25CTQ045 are RoHS non-compliant. Verify RoHS compliance requirements for your application before final part selection.

Q: Which substitute offers the best thermal performance?

A: STPS3045CT offers the highest maximum junction temperature rating at 200°C, followed by MBR2545CTG at 175°C. Both exceed the original MBR2545CT specification of 150°C. For applications requiring extended thermal performance, STPS3045CT is the recommended choice.

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