MBR6045WT Equivalent & Substitute Parts

Part Overview

The MBR6045WT is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as 1 Pair Common Cathode with 45 V reverse voltage rating and 30 A average rectified current per diode. The device is packaged in TO-247-3 through-hole configuration and is classified as obsolete product status. Due to obsolescence, equivalent and substitute parts from active manufacturers are necessary for ongoing design support and procurement continuity.

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)	30	A
Voltage - Forward (Vf) (Max) @ If	620 mV @ 30 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1	mA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—

Substitute Part Grouping Explanation

Substitution eligibility for the MBR6045WT is determined by the following critical parameters:

Primary Matching Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Mounting Type: Through Hole
Package / Case: TO-247-3

Secondary Compatibility Parameters:

Current - Average Rectified (Io) (per Diode): 30 A (exact match required for full equivalence)
Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: Minimum -55°C to 150°C

Substitute parts are grouped into three categories:

Category 1: Parametric Equivalents — Identical electrical specifications and package configuration. Direct replacement without circuit modification.

Category 2: Upgrade Parts — Active product status with equivalent or superior electrical performance. May have minor package variant designations.

Category 3: Manufacturer Recommended Alternatives — Active products with different current ratings or forward voltage characteristics. Require application-level verification of current capacity and thermal performance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Tj (Operating)	Package	Product Status	RoHS Status
MBR6045WT	Vishay General Semiconductor	45 V	30 A	620 mV @ 30 A	-55 to 150°C	TO-247-3	Obsolete	Non-compliant
VS-MBR6045WT-N3	Vishay General Semiconductor	45 V	30 A	620 mV @ 30 A	-55 to 150°C	TO-247-3	Active	Not specified
MBR6045WT	SMC Diode Solutions	45 V	Not specified	650 mV @ 30 A	-55 to 150°C	TO-247-3	Active	ROHS3 Compliant
STPS6045CW	STMicroelectronics	45 V	30 A	630 mV @ 30 A	-55 to 175°C	TO-247-3	Active	ROHS3 Compliant
STPS60L45CW	STMicroelectronics	45 V	30 A	550 mV @ 30 A	-55 to 150°C	TO-247-3	Active	ROHS3 Compliant
DSB60C45HB	IXYS	45 V	30 A	620 mV @ 30 A	-55 to 150°C	TO-247-3	Active	ROHS3 Compliant
STPS4045CWY	STMicroelectronics	45 V	20 A	760 mV @ 20 A	-40 to 175°C	TO-247-3	Active	ROHS3 Compliant
STPS3045CW	STMicroelectronics	45 V	15 A	570 mV @ 15 A	-55 to 200°C	TO-247-3	Active	ROHS3 Compliant
STPS30L45CW	STMicroelectronics	45 V	15 A	550 mV @ 15 A	-55 to 150°C	TO-247-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents):

VS-MBR6045WT-N3 from Vishay General Semiconductor provides identical electrical specifications to the MBR6045WT. This part maintains the same 45 V reverse voltage, 30 A current rating, and 620 mV forward voltage at 30 A. The part is in active production status with 12,590 units in stock, ensuring long-term availability. This is the preferred choice for direct substitution in existing designs.

DSB60C45HB from IXYS offers parametric equivalence with identical voltage and current ratings and matching forward voltage characteristics. The part is ROHS3 compliant and in active status. Current reverse leakage is specified at 10 mA @ 45 V, which is higher than the original specification of 1 mA @ 45 V. This difference must be evaluated in applications sensitive to leakage current.

Active Upgrade Options (Full 30 A Rating):

STPS6045CW from STMicroelectronics maintains the 30 A current rating with 45 V reverse voltage. Forward voltage is 630 mV @ 30 A, which is 10 mV higher than the original. Operating temperature range extends to 175°C maximum junction temperature. ROHS3 compliance is confirmed. This part is suitable for designs requiring extended temperature performance.

STPS60L45CW from STMicroelectronics provides the same 30 A and 45 V ratings with superior forward voltage performance at 550 mV @ 30 A, representing an 70 mV improvement over the original specification. This results in reduced power dissipation. Maximum junction temperature is 150°C. ROHS3 compliant. This part is recommended for applications where thermal management is critical.

Reduced Current Alternatives (20 A and 15 A Ratings):

STPS4045CWY from STMicroelectronics is rated for 20 A average rectified current at 45 V reverse voltage. Forward voltage is 760 mV @ 20 A. This part includes automotive qualification (AEC-Q101) and operates from -40°C to 175°C. Use only in applications where 20 A current capacity is sufficient.

STPS3045CW and STPS30L45CW from STMicroelectronics are rated for 15 A current. These parts are suitable only for applications with reduced current requirements and do not provide equivalent current capacity to the original MBR6045WT.

Compliance Considerations:

The original MBR6045WT is RoHS non-compliant. All recommended substitute parts (VS-MBR6045WT-N3, STPS6045CW, STPS60L45CW, DSB60C45HB, STPS4045CWY) are ROHS3 compliant, supporting modern procurement and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can VS-MBR6045WT-N3 be used as a direct replacement for MBR6045WT?

A: Yes. VS-MBR6045WT-N3 is a parametric equivalent with identical electrical specifications: 45 V reverse voltage, 30 A average rectified current per diode, 620 mV forward voltage at 30 A, and TO-247-3 package. The part is in active production status. The primary difference is packaging format (Tube vs. unspecified for original), which does not affect electrical performance.

Q: What is the difference between STPS6045CW and STPS60L45CW?

A: Both parts maintain 45 V reverse voltage and 30 A current rating in TO-247-3 package. STPS60L45CW features lower forward voltage (550 mV @ 30 A vs. 630 mV @ 30 A), resulting in approximately 2.4 W lower power dissipation at full current. STPS6045CW extends maximum junction temperature to 175°C compared to 150°C for STPS60L45CW. Select STPS60L45CW for thermal-sensitive applications; select STPS6045CW for extended temperature operation.

Q: Why are STPS3045CW and STPS30L45CW listed as alternatives if they have only 15 A rating?

A: These parts are listed as manufacturer-recommended alternatives but are not equivalent substitutes. They provide only 50% of the original 30 A current capacity. Use these parts only in applications where circuit design permits reduced current handling or where current requirements have been re-evaluated to 15 A or below.

Q: Is DSB60C45HB suitable for applications with strict leakage current specifications?

A: DSB60C45HB specifies 10 mA reverse leakage current @ 45 V, compared to 1 mA for the original MBR6045WT. This 10-fold increase in leakage current may be unacceptable in precision analog circuits or low-power applications. Evaluate leakage current requirements before selecting this part.

Q: What package variants exist among the substitute parts?

A: All substitute parts use TO-247-3 package configuration. Supplier device package designations vary slightly (TO-247AC, TO-247AD, TO-247-3), but these represent equivalent mechanical and electrical interfaces. No package conversion is required for any listed substitute.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (VS-MBR6045WT-N3, STPS6045CW, STPS60L45CW, DSB60C45HB, STPS4045CWY, STPS3045CW, STPS30L45CW) are ROHS3 compliant. The original MBR6045WT is RoHS non-compliant. Substitution provides compliance upgrade for modern supply chain requirements.

Q: Can STPS4045CWY be used in place of MBR6045WT?

A: STPS4045CWY is not a full equivalent. It provides only 20 A average rectified current compared to 30 A for the original. Use only if circuit design permits operation at reduced current capacity. The part includes automotive qualification (AEC-Q101) and extended temperature range (-40°C to 175°C), which may be beneficial in specific applications.

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