MBRB4045CTTRL Equivalent & Substitute Parts

Part Overview

The MBRB4045CTTRL 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 20 A average rectified current per diode. The device is packaged in TO-263-3 (D2PAK) surface mount format with fast recovery characteristics suitable for high-frequency rectification applications.

The MBRB4045CTTRL 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.

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)	20 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MBRB4045CTTRL is determined by 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): 20 A (or higher)
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Category 1: Direct Parametric Equivalents (20 A Rating) Parts that match all primary criteria with identical 20 A current rating and 45 V voltage rating. These parts are fully interchangeable at the circuit level.

Category 2: Manufacturer Recommended Alternatives (Reduced Current Ratings) Parts with reduced current ratings (10 A to 15 A) that maintain 45 V voltage rating and identical package format. These parts are suitable for applications where the full 20 A capability is not required.

Category 3: Active Production Alternatives Parts from alternative manufacturers that meet or exceed the primary electrical specifications while offering active product status and improved compliance certifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Io (per Diode)	Vr (Max)	Vf (Max) @ If	Ir @ Vr	Tj (Operating)	Product Status	RoHS Status	Package
MBRB4045CTTRL	Vishay	20 A	45 V	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	Obsolete	RoHS non-compliant	TO-263AB
VS-MBRB4045CT-M3	Vishay	20 A	45 V	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	Active	ROHS3 Compliant	TO-263AB
VS-MBRB4045CTHM3	Vishay	20 A	45 V	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	Active	ROHS3 Compliant	TO-263AB
STPS40L45CG-TR	STMicroelectronics	20 A	45 V	530 mV @ 20 A	600 µA @ 45 V	150°C (Max)	Active	ROHS3 Compliant	D2PAK
STPS40L45CGY-TR	STMicroelectronics	20 A	45 V	530 mV @ 20 A	600 µA @ 45 V	-40°C ~ 150°C	Active	ROHS3 Compliant	D2PAK
STPS41L45CG-TR	STMicroelectronics	20 A	45 V	530 mV @ 20 A	1.2 mA @ 45 V	150°C (Max)	Active	ROHS3 Compliant	D2PAK
DSSK28-0045BS-TRL	IXYS	15 A	45 V	480 mV @ 15 A	20 mA @ 45 V	-55°C ~ 150°C	Active	ROHS3 Compliant	TO-263AB
STPS2045CG-TR	STMicroelectronics	10 A	45 V	570 mV @ 10 A	100 µA @ 45 V	175°C (Max)	Active	ROHS3 Compliant	D2PAK
STPS20L45CG-TR	STMicroelectronics	10 A	45 V	550 mV @ 10 A	200 µA @ 45 V	150°C (Max)	Active	ROHS3 Compliant	D2PAK
STPS2545CGY-TR	STMicroelectronics	12.5 A	45 V	840 mV @ 25 A	125 µA @ 45 V	-40°C ~ 175°C	Active	ROHS3 Compliant	D2PAK

Engineering Selection Recommendations

Full Current Rating Equivalents (20 A)

VS-MBRB4045CT-M3 and VS-MBRB4045CTHM3 are direct parametric equivalents from Vishay. Both parts maintain identical electrical specifications to the MBRB4045CTTRL while offering active product status and ROHS3 compliance. These parts are recommended for applications requiring the full 20 A current rating with no design modifications.

STPS40L45CG-TR, STPS40L45CGY-TR, and STPS41L45CG-TR are STMicroelectronics alternatives that maintain the 20 A current rating and 45 V voltage rating. These parts feature improved forward voltage characteristics (530 mV vs. 600 mV) and active product status with ROHS3 compliance. STPS40L45CGY-TR includes automotive-grade qualification (AEC-Q101) and extended operating temperature range (-40°C ~ 150°C).

Reduced Current Rating Alternatives (10 A to 15 A)

DSSK28-0045BS-TRL from IXYS provides a 15 A current rating with 45 V voltage rating in TO-263AB package. This part is suitable for applications where 15 A capacity is sufficient and offers active product status with ROHS3 compliance.

STPS2045CG-TR and STPS20L45CG-TR from STMicroelectronics provide 10 A current ratings with 45 V voltage rating. These parts are suitable for lower-current applications and offer active product status with ROHS3 compliance. STPS2045CG-TR features the highest maximum junction temperature (175°C).

STPS2545CGY-TR from STMicroelectronics provides a 12.5 A current rating with 45 V voltage rating. This part includes automotive-grade qualification (AEC-Q101) and extended operating temperature range (-40°C ~ 175°C), making it suitable for automotive applications with moderate current requirements.

Compliance Considerations

All substitute parts listed are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete MBRB4045CTTRL. Parts with AEC-Q101 qualification (VS-MBRB4045CT-M3, VS-MBRB4045CTHM3, STPS40L45CGY-TR, STPS2545CGY-TR) are suitable for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB4045CT-M3 or VS-MBRB4045CTHM3 be used as direct replacements for MBRB4045CTTRL?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (20 A, 45 V, 600 mV forward voltage, 1 mA reverse leakage) and identical package format (TO-263AB). The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.

Q: What is the difference between STPS40L45CG-TR and STPS40L45CGY-TR?

A: Both parts maintain identical 20 A current rating and 45 V voltage rating with identical forward voltage (530 mV @ 20 A). STPS40L45CGY-TR includes automotive-grade qualification (AEC-Q101) and extended operating temperature range (-40°C ~ 150°C) compared to STPS40L45CG-TR (150°C maximum). STPS40L45CGY-TR is recommended for automotive applications.

Q: Can STPS2045CG-TR or STPS20L45CG-TR be used in place of MBRB4045CTTRL?

A: These parts have reduced current ratings (10 A vs. 20 A). They are suitable only for applications where the circuit current requirement does not exceed 10 A. Circuit analysis is required to confirm compatibility. Both parts maintain 45 V voltage rating and identical package format.

Q: What is the difference between TO-263AB and D2PAK packaging?

A: TO-263AB and D2PAK are equivalent designations for the same surface mount package format (TO-263-3, 2 Leads + Tab). Parts specified with either designation are mechanically and electrically compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original MBRB4045CTTRL is RoHS non-compliant. Substitution with any listed part addresses RoHS compliance requirements.

Q: Which substitute part is recommended for automotive applications?

A: STPS40L45CGY-TR and STPS2545CGY-TR include automotive-grade qualification (AEC-Q101). VS-MBRB4045CT-M3 and VS-MBRB4045CTHM3 also include AEC-Q101 qualification. These parts are suitable for automotive applications requiring 20 A, 12.5 A, or equivalent current ratings at 45 V.

Q: What is the significance of forward voltage differences between substitute parts?

A: Forward voltage (Vf) affects power dissipation and thermal performance. STPS40L45CG-TR, STPS40L45CGY-TR, and STPS41L45CG-TR feature lower forward voltage (530 mV @ 20 A) compared to MBRB4045CTTRL (600 mV @ 20 A), resulting in reduced power loss. This difference is significant in high-current applications.

Q: Can DSSK28-0045BS-TRL be used as a substitute?

A: DSSK28-0045BS-TRL has a reduced current rating (15 A vs. 20 A) and higher reverse leakage current (20 mA @ 45 V vs. 1 mA @ 45 V). It is suitable only for applications where 15 A capacity is sufficient and higher reverse leakage is acceptable. Circuit analysis is required to confirm compatibility.

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