MBRB2545CT Equivalent & Substitute Parts

Part Overview

The MBRB2545CT 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 15 A per diode. The component is housed in a TO-263-3 D2PAK surface mount package. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

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

Substitute Part Grouping Explanation

Substitution of the MBRB2545CT 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
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount

Allowable Variation Parameters:

Current - Average Rectified (Io) (per Diode): Equal to or greater than 15 A
Voltage - Forward (Vf) (Max) @ If: Equal to or lower than 820 mV @ 30 A
Current - Reverse Leakage @ Vr: Equal to or lower than 200 µA @ 45 V
Operating Temperature - Junction: Must encompass or exceed -65°C to 175°C range

Substitute parts are grouped into two categories: Direct Equivalents (matching all parameters within tolerance) and Functional Equivalents (meeting or exceeding performance specifications while maintaining package and electrical compatibility).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Junction)	Package	Product Status
MBRB2545CT	onsemi	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 175°C	TO-263-3, D2PAK	Obsolete
MBRB2545CT	Vishay General Semiconductor - Diodes Division	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Obsolete
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
MBRB2545CT-TP	Micro Commercial Co	45 V	30 A	750 mV @ 15 A	200 µA @ 45 V	-55°C ~ 150°C	TO-263-3, D2PAK	Active
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
STPS2545CT	STMicroelectronics	45 V	12.5 A	570 mV @ 12.5 A	125 µA @ 45 V	175°C (Max)	TO-220-3	Active
STPS3045CG-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C (Max)	TO-263-3, D2PAK	Active
STPS3045CGY-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C (Max)	TO-263-3, D2PAK	Active
STPS30L45CG-TR	STMicroelectronics	45 V	15 A	550 mV @ 15 A	400 µA @ 45 V	150°C (Max)	TO-263-3, D2PAK	Active
VS-40CTQ045S-M3	Vishay General Semiconductor - Diodes Division	45 V	20 A	530 mV @ 20 A	3 mA @ 45 V	-55°C ~ 150°C	TO-263-3, D2PAK	Active
VS-MBRB2545CT-M3	Vishay General Semiconductor - Diodes Division	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred for Pin-Compatible Replacement):

VS-MBRB2545CT-M3 (Vishay General Semiconductor - Diodes Division) provides the closest electrical and mechanical match to the obsolete MBRB2545CT. This part maintains identical diode configuration, reverse voltage rating, average rectified current, forward voltage characteristics, and reverse leakage specifications. The component is housed in the same TO-263-3 D2PAK package and is currently in active production status. The operating temperature range is -65°C to 150°C, which covers the lower end of the original specification. RoHS3 compliance is achieved.

Functional Equivalents (Performance-Enhanced Alternatives):

STPS3045CG-TR and STPS3045CGY-TR (STMicroelectronics) both meet the mandatory electrical parameters with identical 45 V reverse voltage and 15 A average rectified current ratings. These parts feature improved forward voltage characteristics (570 mV @ 15 A versus 820 mV @ 30 A) and extended maximum junction temperature to 200°C. Both are housed in TO-263-3 D2PAK packages and are in active production. STPS3045CGY-TR includes automotive qualification (AEC-Q101) and RoHS3 compliance.

MBRB2545CT-TP (Micro Commercial Co) offers enhanced current capability at 30 A per diode while maintaining 45 V reverse voltage rating and TO-263-3 D2PAK packaging. This part is suitable for applications requiring higher current capacity within the same voltage class and package footprint.

VS-40CTQ045S-M3 (Vishay General Semiconductor - Diodes Division) provides 20 A average rectified current with superior forward voltage performance (530 mV @ 20 A) and significantly reduced reverse leakage (3 mA @ 45 V). This part is in active production with RoHS3 compliance.

Package Consideration:

STPS2545CT (STMicroelectronics) is available in TO-220-3 through-hole package rather than surface mount D2PAK. This part is suitable only for applications where through-hole mounting is acceptable and PCB layout permits package substitution.

Frequently Asked Questions (FAQ)

Q: Can STPS2545CT be used as a direct replacement for MBRB2545CT?

A: STPS2545CT is not a direct replacement due to package incompatibility. The MBRB2545CT uses TO-263-3 D2PAK surface mount packaging, while STPS2545CT uses TO-220-3 through-hole packaging. Additionally, STPS2545CT has a lower average rectified current rating of 12.5 A per diode compared to the 15 A specification of MBRB2545CT. This part is suitable only for applications where through-hole mounting is required and current requirements do not exceed 12.5 A per diode.

Q: What is the difference between STPS3045CG-TR and STPS3045CGY-TR?

A: Both parts are electrically identical with 45 V reverse voltage, 15 A average rectified current, and TO-263-3 D2PAK packaging. The primary difference is that STPS3045CGY-TR includes automotive qualification per AEC-Q101 standard, making it suitable for automotive applications. Both parts feature improved forward voltage characteristics (570 mV @ 15 A) and extended maximum junction temperature (200°C) compared to the original MBRB2545CT specification.

Q: Is VS-MBRB2545CT-M3 a complete equivalent to the obsolete MBRB2545CT?

A: VS-MBRB2545CT-M3 is the closest available equivalent, matching all critical electrical parameters including 45 V reverse voltage, 15 A average rectified current, 820 mV forward voltage @ 30 A, and 200 µA reverse leakage @ 45 V. The component uses identical TO-263-3 D2PAK packaging. The operating temperature range is -65°C to 150°C, which covers the lower portion of the original -65°C to 175°C specification. This part is in active production with RoHS3 compliance.

Q: Can MBRB2545CT-TP be used in place of MBRB2545CT?

A: MBRB2545CT-TP is compatible from a package and voltage perspective, both using TO-263-3 D2PAK surface mount packaging and 45 V reverse voltage rating. However, MBRB2545CT-TP has a higher average rectified current rating of 30 A per diode compared to the 15 A specification of MBRB2545CT. This part is suitable for applications where higher current capacity is beneficial or required. The forward voltage is slightly lower at 750 mV @ 15 A.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Diode configuration must remain 1 pair common cathode, (2) Technology must be Schottky, (3) Reverse voltage rating must be 45 V, (4) Package must be TO-263-3 D2PAK for surface mount applications, and (5) Mounting type must be surface mount. Average rectified current must be equal to or greater than 15 A per diode. Forward voltage and reverse leakage should be equal to or better than the original specifications.

Q: Why does DSSK28-0045BS-TRL have significantly higher reverse leakage current?

A: DSSK28-0045BS-TRL specifies 20 mA reverse leakage @ 45 V, which is substantially higher than the 200 µA specification of MBRB2545CT. This difference reflects different manufacturing processes and device characteristics between IXYS and onsemi/Vishay designs. While the part meets the mandatory voltage and current ratings and uses compatible packaging, the elevated reverse leakage may impact circuit performance in applications sensitive to leakage current characteristics.

Q: Are there RoHS compliance differences between substitute options?

A: The original MBRB2545CT is RoHS non-compliant. Most active substitute parts including VS-MBRB2545CT-M3, STPS3045CG-TR, STPS3045CGY-TR, and VS-40CTQ045S-M3 are RoHS3 compliant. STPS2545CGY-TR is also RoHS3 compliant. Selection of RoHS-compliant alternatives supports compliance with current environmental regulations and procurement requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message