Equivalent & Substitute Parts Reference: MBR4045WT

Part Overview

The MBR4045WT from Vishay General Semiconductor - Diodes Division is a Schottky diode array configured as 1 Pair Common Cathode, rated for 45 V DC reverse voltage and 20A average rectified current per diode, housed in a TO-247-3 through-hole package. This product is obsolete, requiring identification of parametric equivalent and manufacturer-recommended substitutes based strictly on the provided electrical, mechanical, and compliance parameters.

Key Parameters

Parameter	MBR4045WT Value	Description
Diode Configuration	1 Pair Common Cathode	Topology for diode array
Technology	Schottky	Type of diode technology
Voltage - DC Reverse (Vr) (Max)	45 V	Maximum reverse voltage rating
Current - Average Rectified (Io) (per Diode)	20A	Maximum average rectified current per diode
Voltage - Forward (Vf) (Max) @ If	590 mV @ 20 A	Maximum forward voltage at given current
Speed	Fast Recovery <= 500ns, >200mA (Io)	Switching and recovery speed
Current - Reverse Leakage @ Vr	1.75 mA @ 45 V	Maximum reverse leakage current at rated voltage
Operating Temperature - Junction	-55°C ~ 150°C	Junction temperature range
Mounting Type	Through Hole	Mounting method
Package / Case	TO-247-3	Industry standard package
Supplier Device Package	TO-247AC	Manufacturer-supplied package specification
RoHS Status	RoHS non-compliant	Environmental compliance
REACH Status	REACH Unaffected	Regulatory status

Substitute Part Grouping Explanation

Substitutes for MBR4045WT are selected strictly based on the following allowed parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io) (per Diode): ≥20A
Speed: Fast Recovery ≤500ns
Package: TO-247-3 (through-hole)
Voltage - Forward (Vf) (Max) @ If: Provided value comparison
Current - Reverse Leakage @ Vr: Provided value comparison
Operating Temperature - Junction: As specified
RoHS and REACH compliance status

Any listed equivalent or substitute must match these parameters to ensure electrical and mechanical compatibility within the provided scope.

Parameter Comparison

Parameter	MBR4045WT	VS-MBR4045WT-N3	DSSK80-0045B	STPS4045CW	STPS4045CWY	STPS40L45CW
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	20A	20A	40A	20A	20A	20A
Voltage - Forward (Vf) (Max) @ If	590 mV @ 20 A	590 mV @ 20 A	510 mV @ 40 A	760 mV @ 20 A	760 mV @ 20 A	530 mV @ 20 A
Speed	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns
Current - Reverse Leakage @ Vr	1.75 mA @ 45 V	1.75 mA @ 45 V	30 mA @ 45 V	200 µA @ 45 V	200 µA @ 45 V	600 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	175°C (Max)	-40°C ~ 175°C	150°C (Max)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

MBR4045WT is obsolete. All listed substitutes—VS-MBR4045WT-N3, DSSK80-0045B, STPS4045CW, STPS4045CWY, and STPS40L45CW—match the electrical, configuration, and package requirements. Substitutes have ROHS3 compliant status and REACH unaffected status, which can be used for designs requiring environmental certification. The parametric equivalent (VS-MBR4045WT-N3) provides identical electrical, mechanical, and regulatory characteristics in an active production status. Manufacturer-recommended substitutes offer variations in forward voltage, leakage current, current rating, and maximum junction temperature, as strictly specified.

Frequently Asked Questions (FAQ)

Q1: Can TO-247-3 package substitutes be used in place of MBR4045WT?
A1: All listed substitutes use the TO-247-3 through-hole package, matching the mechanical footprint and mounting method.

Q2: How is electrical compatibility determined for substitute parts?
A2: Substitution is based on Schottky technology, 1 Pair Common Cathode configuration, 45V maximum reverse voltage, sufficient current rating (≥20A), similar fast recovery speed, and matching or higher operating temperature range.

Q3: Why is RoHS and REACH status relevant?
A3: Substitute parts with ROHS3 compliance and REACH unaffected status meet contemporary environmental standards, where the main part (MBR4045WT) does not.

Q4: Are there differences in forward voltage or leakage current among substitutes?
A4: Substitute parts vary in forward voltage and reverse leakage current; these differences are reflected in the parameter comparison table and must be evaluated based solely on the provided data.

Q5: What criteria are used for certified or automotive-grade substitutes?
A5: If specified, certification and qualification (e.g., AEC-Q101 Grade) information distinguishes automotive-grade parts, as shown for STPS4045CWY.

Q6: Is it permissible to select a substitute with a higher current rating?
A6: All substitutes provided meet or exceed the 20A average rectified current of the MBR4045WT as outlined in the selection criteria.

Q7: Are substitutes influenced by obsolete status of the main part?
A7: Yes; with MBR4045WT obsolete, only active, parameter-matching substitutes are provided for direct replacement.

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