MBRB2045CT Equivalent & Substitute Parts

Part Overview

The MBRB2045CT is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 10 A average rectified current per diode. The device is packaged in a TO-263-3 D2PAK surface mount package with 2 leads plus tab.

The MBRB2045CT is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Substitute parts must maintain electrical compatibility across critical parameters including reverse voltage rating, current capacity, forward voltage characteristics, and thermal operating range.

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	570 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 45 V
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—

Substitute Part Grouping Explanation

Substitution of the MBRB2045CT is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

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

Allowable Variation Parameters:

Current - Average Rectified (Io): Equal to or greater than 10 A per diode
Voltage - Forward (Vf): Within acceptable circuit operating margins
Current - Reverse Leakage: Equal to or less than specified maximum
Operating Temperature - Junction: Must encompass or exceed -65°C to 150°C range

Substitute parts are grouped into the following categories based on their relationship to the main part:

Parametric Equivalents: Parts with identical electrical specifications and active product status from the same manufacturer (Vishay).

Direct Manufacturer Alternatives: Parts from alternative manufacturers with matching or superior current ratings and identical voltage specifications.

Upgrade Options: Parts with enhanced thermal performance or higher current capacity while maintaining voltage compatibility.

Manufacturer Recommended Substitutes: Parts recommended by original equipment manufacturers with enhanced performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Operating)	Package	Product Status	RoHS Status
MBRB2045CT	Vishay	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	-65 to 150°C	TO-263-3, D2PAK	Obsolete	Non-compliant
VS-MBRB2045CTL-M3	Vishay	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	-65 to 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
VS-MBRB2045CTR-M3	Vishay	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	-65 to 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
MBRB2045CT-TP	Micro Commercial Co	45 V	20 A	570 mV @ 10 A	100 µA @ 45 V	-55 to 150°C	TO-263-3, D2PAK	Active	Not specified
STPS2045CG-TR	STMicroelectronics	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	-40 to 175°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 µA @ 45 V	-55 to 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
STPS2545CGY-TR	STMicroelectronics	45 V	12.5 A	840 mV @ 25 A	125 µA @ 45 V	-40 to 175°C	TO-263-3, D2PAK	Active	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalent Selection:

VS-MBRB2045CTL-M3 and VS-MBRB2045CTR-M3 are direct parametric equivalents to the MBRB2045CT. Both parts are manufactured by Vishay and maintain identical electrical specifications. Both are classified as Active products with ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete MBRB2045CT. These parts are suitable for direct replacement in existing designs without circuit modification.

Direct Manufacturer Alternative:

MBRB2045CT-TP from Micro Commercial Co provides a 45 V, 20 A rated alternative in the same D2PAK package. This part offers double the current capacity while maintaining the same voltage rating and forward voltage characteristics. The operating temperature range is -55°C to 150°C, which encompasses the lower bound of the original part. This option is appropriate for designs requiring enhanced current margin or thermal headroom.

Upgrade Option:

STPS2045CG-TR from STMicroelectronics provides identical electrical specifications to the MBRB2045CT with an extended maximum junction temperature of 175°C compared to the original 150°C. This part is ROHS3 compliant and offers improved thermal performance. The operating temperature range of -40°C to 175°C provides enhanced high-temperature capability.

Manufacturer Recommended Substitutes:

DSSK28-0045BS-TRL from IXYS is rated for 15 A per diode with a 45 V reverse voltage rating. This part features lower forward voltage (480 mV @ 15 A) and significantly lower reverse leakage current (20 µA @ 45 V) compared to the original specification. The part is ROHS3 compliant and suitable for applications requiring improved efficiency and reduced leakage characteristics.

STPS2545CGY-TR from STMicroelectronics is rated for 12.5 A per diode at 45 V. This part includes automotive-grade qualification (AEC-Q101) and is suitable for automotive applications. The extended junction temperature range to 175°C and ROHS3 compliance make this option appropriate for demanding thermal environments.

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB2045CTL-M3 or VS-MBRB2045CTR-M3 be used as direct replacements for MBRB2045CT?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, diode configuration, package type, and thermal characteristics. The primary difference is product status (Active vs. Obsolete) and RoHS compliance. These parts are suitable for direct substitution without circuit redesign.

Q: What is the difference between VS-MBRB2045CTL-M3 and VS-MBRB2045CTR-M3?

A: Both parts are electrically identical. The difference lies in packaging format: VS-MBRB2045CTL-M3 is supplied in Tape & Reel format, while VS-MBRB2045CTR-M3 is also supplied in Tape & Reel format. Both are Active products with ROHS3 compliance. Selection between these parts depends on procurement and assembly requirements.

Q: Can MBRB2045CT-TP be used in place of MBRB2045CT?

A: Yes, with design considerations. MBRB2045CT-TP maintains the same 45 V reverse voltage rating and D2PAK package compatibility. The part is rated for 20 A per diode, providing enhanced current capacity. The operating temperature range is -55°C to 150°C, which is compatible with the original specification. This part is suitable for applications where increased current margin is beneficial.

Q: What are the advantages of STPS2045CG-TR over the original MBRB2045CT?

A: STPS2045CG-TR maintains identical electrical specifications (45 V, 10 A) and package compatibility. The primary advantages are extended maximum junction temperature (175°C vs. 150°C), ROHS3 compliance, and Active product status. This part is suitable for applications requiring improved thermal performance.

Q: When should DSSK28-0045BS-TRL be selected?

A: DSSK28-0045BS-TRL is appropriate when reduced forward voltage drop and leakage current are design priorities. The part is rated for 15 A per diode with 45 V reverse voltage. Forward voltage is 480 mV @ 15 A compared to 570 mV @ 10 A for the original part. Reverse leakage is 20 µA @ 45 V compared to 100 µA @ 45 V. This part is suitable for efficiency-critical applications.

Q: Is STPS2545CGY-TR suitable for automotive applications?

A: Yes. STPS2545CGY-TR is qualified to AEC-Q101 automotive standards and carries automotive-grade designation. The part is rated for 12.5 A per diode at 45 V with extended junction temperature range (-40°C to 175°C). This part is appropriate for automotive and other mission-critical applications requiring formal qualification.

Q: Are all substitute parts compatible with the TO-263-3 D2PAK footprint?

A: Yes. All substitute parts listed are packaged in TO-263-3 D2PAK (2 Leads + Tab) or compatible variants (TO-263AB, TO-263AA). These packages are mechanically and electrically compatible for PCB assembly purposes.

Q: What is the significance of RoHS compliance in selecting a substitute?

A: RoHS compliance is a regulatory requirement in many markets. The original MBRB2045CT is RoHS non-compliant. All recommended substitute parts (VS-MBRB2045CTL-M3, VS-MBRB2045CTR-M3, STPS2045CG-TR, DSSK28-0045BS-TRL, and STPS2545CGY-TR) are ROHS3 compliant, ensuring compliance with current environmental regulations.

Q: Can parts with higher current ratings be used in circuits designed for 10 A?

A: Yes. Parts with equal or higher current ratings (such as MBRB2045CT-TP at 20 A or DSSK28-0045BS-TRL at 15 A) are suitable for circuits designed for 10 A operation. The higher rating provides additional margin and does not negatively impact circuit performance. Voltage ratings and package compatibility must remain matched.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message