MBRB1545CT Equivalent & Substitute Parts

Part Overview

The MBRB1545CT is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration with a maximum reverse voltage of 45 V and an average rectified current of 7.5 A per diode. The device is housed in a TO-263-3 D2PAK surface mount package.

The MBRB1545CT is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

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)	7.5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 7.5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MBRB1545CT is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Performance Parameters:

Current - Average Rectified (Io) (per Diode): 7.5 A minimum
Voltage - Forward (Vf) (Max) @ If: Must support 7.5 A operation
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 100 µA @ 45 V maximum

Substitute parts are classified into three categories:

Direct Equivalents: Parts with identical electrical specifications and configuration, differing only in manufacturer or product status.

Upgrades: Parts with equal or superior electrical performance characteristics, including higher current ratings or improved forward voltage characteristics, while maintaining the same package and voltage rating.

Manufacturer Recommended Alternatives: Parts with enhanced specifications or compliance certifications suitable for replacement in new designs or production transitions.

Parameter Comparison

Part Number	Manufacturer	Diode Config	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Tj (Operating)	Product Status	RoHS Status
MBRB1545CT	Vishay General Semiconductor	1 Pair Common Cathode	45 V	7.5 A	840 mV @ 7.5 A	-65°C ~ 150°C	Obsolete	RoHS non-compliant
MBRB1545CT	Vishay General Semiconductor	1 Pair Common Cathode	45 V	7.5 A	840 mV @ 7.5 A	-65°C ~ 150°C	Obsolete	RoHS non-compliant
MBRB1545CTT4G	onsemi	1 Pair Common Cathode	45 V	7.5 A	570 mV @ 7.5 A	-65°C ~ 175°C	Active	ROHS3 Compliant
STPS1545CG-TR	STMicroelectronics	1 Pair Common Cathode	45 V	7.5 A	570 mV @ 7.5 A	-65°C ~ 175°C	Active	ROHS3 Compliant
MBRB1545	SMC Diode Solutions	Single Diode	45 V	15 A	700 mV @ 15 A	-55°C ~ 150°C	Active	ROHS3 Compliant
12TQ045S	Vishay General Semiconductor	Single Diode	45 V	15 A	560 mV @ 15 A	-55°C ~ 150°C	Obsolete	RoHS non-compliant
STPS2545CGY-TR	STMicroelectronics	1 Pair Common Cathode	45 V	12.5 A	840 mV @ 25 A	-40°C ~ 175°C	Active	ROHS3 Compliant
STPS3045CG-TR	STMicroelectronics	1 Pair Common Cathode	45 V	15 A	570 mV @ 15 A	-65°C ~ 200°C	Active	ROHS3 Compliant
DSSK28-0045BS-TRL	IXYS	1 Pair Common Cathode	45 V	15 A	480 mV @ 15 A	-55°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Specifications):

The MBRB1545CT from Vishay General Semiconductor - Diodes Division serves as the direct equivalent. However, this part is classified as obsolete. For continued production support, direct functional equivalents with active product status are required.

Recommended Active Alternatives:

MBRB1545CTT4G (onsemi) is the primary recommended substitute. This part maintains identical diode configuration (1 Pair Common Cathode), voltage rating (45 V), and current rating (7.5 A per diode). The MBRB1545CTT4G offers improved forward voltage characteristics (570 mV @ 7.5 A versus 840 mV), an extended operating temperature range (-65°C ~ 175°C), and ROHS3 compliance. Product status is Active with Tape & Reel packaging.

STPS1545CG-TR (STMicroelectronics) provides equivalent electrical performance with identical configuration and ratings. This part features the same forward voltage improvement (570 mV @ 7.5 A), extended temperature capability (175°C maximum), and ROHS3 compliance. Product status is Active.

Enhanced Current Rating Alternatives:

For applications requiring higher current capacity while maintaining the 45 V voltage rating and common cathode configuration:

STPS3045CG-TR (STMicroelectronics) provides 15 A per diode current rating with superior forward voltage (570 mV @ 15 A), maximum junction temperature of 200°C, and ROHS3 compliance. This part is suitable for designs requiring increased current handling.

DSSK28-0045BS-TRL (IXYS) offers 15 A per diode current rating with the lowest forward voltage (480 mV @ 15 A) among available alternatives. This part maintains the common cathode configuration and 45 V rating with ROHS3 compliance.

STPS2545CGY-TR (STMicroelectronics) provides 12.5 A per diode current rating with automotive-grade qualification (AEC-Q101) and extended temperature range (-40°C ~ 175°C). This part is suitable for automotive applications requiring enhanced reliability.

Compliance Considerations:

The original MBRB1545CT is RoHS non-compliant. All recommended active alternatives are ROHS3 compliant, supporting transition to compliant supply chains. The STPS2545CGY-TR includes AEC-Q101 automotive qualification for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can MBRB1545CTT4G directly replace MBRB1545CT in existing designs?

A: Yes. The MBRB1545CTT4G maintains identical diode configuration (1 Pair Common Cathode), voltage rating (45 V), and current rating (7.5 A per diode). The improved forward voltage (570 mV versus 840 mV) and extended temperature range provide enhanced performance. Pin-to-pin compatibility is maintained in the TO-263-3 D2PAK package.

Q: What is the difference between MBRB1545CT and MBRB1545?

A: MBRB1545CT is a diode array with 1 Pair Common Cathode configuration rated at 7.5 A per diode. MBRB1545 is a single diode rated at 15 A. These are different device types with different configurations and current ratings. MBRB1545 is not a direct substitute for MBRB1545CT due to configuration differences.

Q: Why do some substitute parts have higher current ratings?

A: Higher current rating alternatives (STPS3045CG-TR, DSSK28-0045BS-TRL) are offered as upgrades for applications requiring increased current capacity. These parts maintain the 45 V voltage rating and common cathode configuration while providing enhanced current handling. They are suitable for new designs or production transitions requiring higher current capability.

Q: Are all recommended substitutes available in the same package?

A: Yes. All recommended substitutes use the TO-263-3 D2PAK (2 Leads + Tab) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive. The original MBRB1545CT is RoHS non-compliant. All active recommended alternatives are ROHS3 compliant, supporting transition to compliant supply chains and meeting regulatory requirements for new production.

Q: Can STPS2545CGY-TR be used in non-automotive applications?

A: Yes. STPS2545CGY-TR is qualified to AEC-Q101 automotive standards but is suitable for general industrial applications. The automotive qualification indicates enhanced reliability and stricter quality control, making it acceptable for non-automotive use where higher reliability is beneficial.

Q: What is the impact of forward voltage differences between substitutes?

A: Forward voltage differences affect power dissipation and thermal performance. Lower forward voltage (570 mV or 480 mV) results in reduced power loss compared to the original 840 mV specification. This improvement reduces heat generation and may improve overall circuit efficiency. Thermal design calculations should account for these differences.

Q: Are there packaging format differences among substitutes?

A: Packaging formats vary. MBRB1545CTT4G and STPS1545CG-TR are supplied in Tape & Reel (TR) format. STPS3045CG-TR is available in Cut Tape (CT) & Digi-Reel® format. DSSK28-0045BS-TRL is supplied in Tape & Reel (TR) format. All maintain the same TO-263-3 D2PAK physical package for PCB compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message