MBRB4045CT Equivalent & Substitute Parts

Part Overview

The MBRB4045CT 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.

The MBRB4045CT is classified as obsolete. Equivalent and substitute parts are available from Vishay and alternative manufacturers, offering active product status with improved compliance certifications and packaging options.

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

Substitute parts for the MBRB4045CT are categorized based on electrical and mechanical compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io) (per Diode): 20 A
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Parametric Equivalents maintain all critical electrical parameters and package specifications. These parts are manufactured by Vishay and represent direct replacements with identical performance characteristics. Packaging variants (Tape & Reel, Tube) provide logistical flexibility without affecting electrical performance.

Direct Manufacturer Equivalents from STMicroelectronics (STPS40L45CG-TR, STPS40L45CGY-TR) maintain the same voltage, current, and package specifications with minor variations in forward voltage and reverse leakage characteristics within acceptable operating ranges.

Manufacturer Recommended Alternatives include parts with reduced current ratings (10 A, 12.5 A, 15 A) or from alternative manufacturers (IXYS). These are suitable for applications where the full 20 A rating is not required.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Package	Product Status	RoHS Status
MBRB4045CT	Vishay	45 V	20 A	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Obsolete	RoHS non-compliant
VS-MBRB4045CTL-M3	Vishay	45 V	20 A	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
VS-MBRB4045CTLHM3	Vishay	45 V	20 A	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
VS-MBRB4045CTR-M3	Vishay	45 V	20 A	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
VS-MBRB4045CTRHM3	Vishay	45 V	20 A	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
STPS40L45CG-TR	STMicroelectronics	45 V	20 A	530 mV @ 20 A	600 µA @ 45 V	-40°C ~ 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
STPS40L45CGY-TR	STMicroelectronics	45 V	20 A	530 mV @ 20 A	600 µA @ 45 V	-40°C ~ 150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
STPS40L45CG-TR	STMicroelectronics	45 V	20 A	530 mV @ 20 A	600 µA @ 45 V	150°C (Max)	TO-263-3, D2PAK	Active	ROHS3 Compliant
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	ROHS3 Compliant
STPS2045CG-TR	STMicroelectronics	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	175°C (Max)	TO-263-3, D2PAK	Active	ROHS3 Compliant
STPS20L45CG-TR	STMicroelectronics	45 V	10 A	550 mV @ 10 A	200 µA @ 45 V	150°C (Max)	TO-263-3, D2PAK	Active	ROHS3 Compliant
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	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Direct Replacement):

The Vishay parts VS-MBRB4045CTL-M3, VS-MBRB4045CTLHM3, VS-MBRB4045CTR-M3, and VS-MBRB4045CTRHM3 provide identical electrical performance to the MBRB4045CT. These parts maintain the same voltage rating (45 V), current rating (20 A per diode), forward voltage (600 mV @ 20 A), and package configuration. All variants are ROHS3 compliant and carry active product status. Selection among these variants depends on packaging requirements: Tape & Reel (TR) for automated assembly or Tube for manual handling.

Alternative Manufacturer Equivalents (Full Rating Match):

STMicroelectronics STPS40L45CG-TR and STPS40L45CGY-TR maintain the 45 V / 20 A specifications with improved forward voltage characteristics (530 mV @ 20 A versus 600 mV @ 20 A). The STPS40L45CGY-TR variant includes automotive-grade qualification (AEC-Q101) and extended operating temperature range (-40°C ~ 150°C). Both parts are ROHS3 compliant and actively produced.

Reduced Current Rating Alternatives:

For applications not requiring the full 20 A rating, STMicroelectronics offers STPS2045CG-TR (10 A), STPS20L45CG-TR (10 A), and STPS2545CGY-TR (12.5 A). The STPS2545CGY-TR includes automotive qualification and extended temperature range (-40°C ~ 175°C). IXYS DSSK28-0045BS-TRL provides 15 A rating with ROHS3 compliance.

Compliance Considerations:

The original MBRB4045CT is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, meeting current regulatory requirements. Automotive-qualified variants (STPS40L45CGY-TR, STPS2545CGY-TR) carry AEC-Q101 certification for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB4045CTL-M3 directly replace MBRB4045CT?

A: Yes. The VS-MBRB4045CTL-M3 is a parametric equivalent with identical electrical specifications (45 V, 20 A, 600 mV forward voltage) and package configuration (TO-263-3, D2PAK). The primary differences are active product status and ROHS3 compliance. Packaging is Tape & Reel format.

Q: What is the difference between VS-MBRB4045CTL-M3 and VS-MBRB4045CTLHM3?

A: Both parts are parametric equivalents with identical electrical performance. The difference is packaging: VS-MBRB4045CTL-M3 is supplied in Tape & Reel format, while VS-MBRB4045CTLHM3 is supplied in Tube format. Electrical specifications and performance are identical.

Q: Can STPS40L45CG-TR replace MBRB4045CT?

A: Yes. The STPS40L45CG-TR maintains the same voltage rating (45 V) and current rating (20 A) with identical package configuration (TO-263-3, D2PAK). Forward voltage is lower (530 mV @ 20 A versus 600 mV @ 20 A), which is advantageous for efficiency. Reverse leakage is lower (600 µA @ 45 V versus 1 mA @ 45 V). Both are ROHS3 compliant.

Q: Why would I choose STPS40L45CGY-TR over STPS40L45CG-TR?

A: The STPS40L45CGY-TR includes automotive-grade qualification (AEC-Q101) and extended operating temperature range (-40°C ~ 150°C). Select this variant for automotive applications or systems requiring enhanced reliability certification.

Q: Can I use STPS2045CG-TR as a substitute?

A: STPS2045CG-TR is suitable only for applications where the current requirement does not exceed 10 A per diode. The voltage rating (45 V) and package (TO-263-3, D2PAK) are compatible, but the current rating is half that of MBRB4045CT. Use this part only if your application current requirement is 10 A or less.

Q: What is the advantage of STPS2545CGY-TR?

A: The STPS2545CGY-TR provides 12.5 A rating with automotive qualification (AEC-Q101) and extended temperature range (-40°C ~ 175°C). This part is suitable for automotive applications requiring higher temperature operation than standard industrial grades.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts are ROHS3 compliant. The original MBRB4045CT is RoHS non-compliant. Substitution with any recommended part improves regulatory compliance.

Q: Does package format affect electrical performance?

A: No. Tape & Reel and Tube packaging formats contain identical components with identical electrical specifications. Package format selection depends on assembly process requirements: Tape & Reel for automated pick-and-place equipment, Tube for manual assembly or lower-volume applications.

Q: What is the difference between DSSK28-0045BS-TRL and MBRB4045CT?

A: The DSSK28-0045BS-TRL is rated for 15 A per diode versus 20 A for MBRB4045CT. Voltage rating (45 V) and package (TO-263-3, D2PAK) are identical. Forward voltage is lower (480 mV @ 15 A), and reverse leakage is higher (20 mA @ 45 V). This part is suitable for applications requiring 15 A or less.

Q: Can I mix different substitute parts in the same design?

A: All recommended substitutes maintain the same voltage rating (45 V) and package configuration (TO-263-3, D2PAK), allowing interchangeability at the board level. However, current rating differences (10 A, 12.5 A, 15 A, 20 A) must be matched to application requirements. Mixing parts with different current ratings in parallel applications requires careful thermal and current distribution analysis.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message