MBRB1545CTG Equivalent & Substitute Parts

Part Overview

The MBRB1545CTG is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 7.5 A per diode. The device is housed in a TO-263-3 D2PAK surface mount package and is part of the SWITCHMODE™ series. The product status is obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

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	570 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 ~ 175°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MBRB1545CTG is determined by the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage rating: 45 V maximum reverse voltage
Current rating: Minimum 7.5 A average rectified current per diode
Package: TO-263-3 D2PAK surface mount
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Substitution Categories:

Direct Equivalents meet all primary criteria with identical or superior electrical performance at the specified 7.5 A current rating and 45 V voltage rating.

Higher Current Rated Substitutes exceed the 7.5 A current requirement while maintaining 45 V voltage rating and identical package configuration. These parts are suitable for applications where the original 7.5 A specification provides insufficient margin or where higher current capability is required.

Voltage/Current Variants deviate from the original specifications in voltage or current ratings and are listed for reference only where applications may tolerate such deviations.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Operating)	Package	Status
MBRB1545CTG	onsemi	45 V	7.5 A	570 mV @ 7.5 A	100 µA @ 45 V	-65°C ~ 175°C	TO-263-3 D2PAK	Obsolete
STPS1545CG-TR	STMicroelectronics	45 V	7.5 A	570 mV @ 7.5 A	100 µA @ 45 V	-40°C ~ 175°C	TO-263-3 D2PAK	Active
MBRB1545CT-E3/81	Vishay General Semiconductor - Diodes Division	45 V	7.5 A	840 mV @ 15 A	100 µA @ 45 V	-65°C ~ 150°C	TO-263-3 D2PAK	Last Time Buy
STPS2545CGY-TR	STMicroelectronics	45 V	12.5 A	840 mV @ 25 A	125 µA @ 45 V	-40°C ~ 175°C	TO-263-3 D2PAK	Active
DSA30C45PC-TRL	IXYS	45 V	15 A	750 mV @ 15 A	250 µA @ 45 V	-55°C ~ 175°C	TO-263-3 D2PAK	Active
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 mA @ 45 V	-55°C ~ 150°C	TO-263-3 D2PAK	Active
MBRS1545CT	Taiwan Semiconductor Corporation	45 V	15 A	840 mV @ 15 A	100 µA @ 45 V	-55°C ~ 150°C	TO-263-3 D2PAK	Active
VS-MBRB3045CT-M3	Vishay General Semiconductor - Diodes Division	45 V	15 A	760 mV @ 30 A	1 mA @ 45 V	-55°C ~ 150°C	TO-263-3 D2PAK	Active
SBR10U200CTB	Diodes Incorporated	200 V	5 A	820 mV @ 5 A	200 µA @ 200 V	-65°C ~ 175°C	TO-263-3 D2PAK	Obsolete

Engineering Selection Recommendations

Direct Equivalent - Recommended Primary Substitute:

STPS1545CG-TR (STMicroelectronics) is the recommended direct equivalent for MBRB1545CTG replacement. This part maintains identical electrical specifications at the 7.5 A current rating and 45 V voltage rating, with matching forward voltage characteristics. The device is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Operating temperature range extends to 175°C maximum, matching the original specification. Availability is confirmed at 7250 pieces in stock.

Alternative Direct Equivalent - Last Time Buy Status:

MBRB1545CT-E3/81 (Vishay General Semiconductor - Diodes Division) provides electrical equivalence with identical 45 V / 7.5 A ratings and matching reverse leakage current. This part carries Last Time Buy status, indicating limited future availability. Operating temperature maximum is 150°C, which is 25°C lower than the original specification. This part is suitable for applications with reduced temperature requirements.

Higher Current Rated Alternatives:

STPS2545CGY-TR (STMicroelectronics) provides 12.5 A current rating at 45 V with active production status and automotive qualification (AEC-Q101). This part is suitable for applications requiring increased current margin.

DSA30C45PC-TRL and DSSK28-0045BS-TRL (IXYS) both provide 15 A current rating at 45 V in identical packaging. DSSK28-0045BS-TRL offers superior forward voltage characteristics (480 mV @ 15 A) compared to DSA30C45PC-TRL (750 mV @ 15 A).

MBRS1545CT (Taiwan Semiconductor Corporation) and VS-MBRB3045CT-M3 (Vishay) both provide 15 A current rating at 45 V with active production status.

Not Recommended:

SBR10U200CTB (Diodes Incorporated) is not suitable as a substitute. Although it shares the same package configuration, it operates at 200 V maximum reverse voltage with only 5 A current rating, representing a significant deviation from the original 45 V / 7.5 A specification. This part is also obsolete.

Frequently Asked Questions (FAQ)

Q: Can STPS1545CG-TR directly replace MBRB1545CTG without circuit modification?

A: Yes. STPS1545CG-TR maintains identical electrical specifications at 45 V reverse voltage and 7.5 A average rectified current per diode, with matching forward voltage of 570 mV @ 7.5 A. Both devices use Schottky technology with fast recovery characteristics and are housed in TO-263-3 D2PAK packages. The operating temperature range of STPS1545CG-TR extends to 175°C, matching the original specification.

Q: What is the difference between direct equivalents and higher current rated substitutes?

A: Direct equivalents such as STPS1545CG-TR maintain the exact 7.5 A current specification of the original part. Higher current rated substitutes such as STPS2545CGY-TR (12.5 A) and DSA30C45PC-TRL (15 A) exceed the original current requirement while maintaining the 45 V voltage rating and identical package. Higher current parts are suitable for applications where additional current margin is beneficial or required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, matching the original MBRB1545CTG specification.

Q: What is the significance of product status (Active, Obsolete, Last Time Buy)?

A: Product status indicates availability and future support. Active status indicates ongoing production and long-term availability. Last Time Buy status indicates limited future availability with a defined end-of-life date. Obsolete status indicates the part is no longer manufactured. STPS1545CG-TR is recommended due to active production status, ensuring long-term supply continuity.

Q: Can I use a higher voltage rated part as a substitute?

A: Higher voltage rated parts are not suitable substitutes for the MBRB1545CTG. The original specification is 45 V maximum reverse voltage. Using parts rated for higher voltages introduces unnecessary cost and may alter circuit performance characteristics. Substitutes must maintain the 45 V voltage rating.

Q: What is the difference between forward voltage specifications at different current levels?

A: Forward voltage varies with current. The original MBRB1545CTG specifies 570 mV @ 7.5 A. Some substitute parts specify forward voltage at different current levels (e.g., 840 mV @ 15 A or 750 mV @ 15 A). When comparing parts, forward voltage must be evaluated at the actual operating current of the application, not at the rated maximum current.

Q: Is the D2PAK package identical across all substitute parts?

A: Yes. All substitute parts use the TO-263-3 D2PAK package configuration with 2 leads plus tab. This ensures mechanical and electrical compatibility with existing PCB layouts and thermal management designs.

Q: Why is SBR10U200CTB listed as a substitute if it is not recommended?

A: SBR10U200CTB is listed because it appears in the original MBRB1545CTG substitute list provided by the manufacturer. However, it is not suitable for direct substitution due to significantly different electrical specifications (200 V / 5 A versus 45 V / 7.5 A). It is included for reference only to provide complete information from the original documentation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message