MBR4050PT Equivalent & Substitute Parts

Part Overview

The MBR4050PT is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 50 V DC reverse voltage and 40 A average rectified current per diode. Manufactured by onsemi, this component is packaged in TO-247-3 (TO-247AD) through-hole format with fast recovery characteristics suitable for high-frequency rectification applications.

The MBR4050PT is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io) (per Diode)	40	A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 20 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1	mA @ 50 V
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MBR4050PT is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io) (per Diode): 40 A minimum
Mounting Type: Through Hole
Package / Case: TO-247-3 or equivalent mechanical form factor

Direct Equivalent: The MBR4050PT-E3/45 (Vishay General Semiconductor - Diodes Division) meets all primary criteria with identical electrical specifications and is classified as Active product status.

Similar Substitutes: Parts listed as similar substitutes meet the core diode configuration, technology, and mounting requirements but may have variations in voltage rating, current rating, or forward voltage characteristics. These parts are suitable for applications where the design specifications allow for the parameter variations indicated in the comparison table.

Parameter Comparison

Parameter	MBR4050PT (onsemi)	MBR4050PT-E3/45 (Vishay)	MBR4050PT (Diodes Inc.)	DSSK60-0045A (IXYS)	DSSK60-0045B (IXYS)	DSSK40-006B (IXYS)	DSSK70-008A (IXYS)	STPS4045CWY (STMicroelectronics)	VS-40L45CW-N3 (Vishay)	MBR40H100WTG (onsemi)
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	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	45 V	45 V	60 V	80 V	45 V	45 V	100 V
Current - Average Rectified (Io) (per Diode)	40 A	40 A	40 A	30 A	30 A	20 A	35 A	20 A	20 A	20 A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 20 A	720 mV @ 20 A	800 mV @ 20 A	690 mV @ 30 A	500 mV @ 30 A	530 mV @ 20 A	770 mV @ 35 A	760 mV @ 20 A	530 mV @ 20 A	800 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 50 V	1 mA @ 50 V	1 mA @ 50 V	1 mA @ 45 V	20 mA @ 45 V	20 mA @ 60 V	4 mA @ 80 V	200 µA @ 45 V	1.5 mA @ 45 V	10 µA @ 100 V
Operating Temperature - Junction	-65 to 150°C	-65 to 150°C	-65 to 150°C	-55 to 175°C	-55 to 150°C	-55 to 150°C	-55 to 175°C	-40 to 175°C	Max 150°C	Max 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-3P-3, SC-65-3	TO-3P-3, SC-65-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection:

The MBR4050PT-E3/45 manufactured by Vishay General Semiconductor - Diodes Division is the primary direct equivalent. This part maintains identical electrical specifications (50 V, 40 A, 720 mV forward voltage) and is classified as Active product status. The TO-3P-3 and SC-65-3 package designations are mechanically equivalent to the TO-247-3 form factor. This part is suitable for direct substitution in existing designs without circuit modification.

The MBR4050PT manufactured by Diodes Incorporated is also classified as Active and meets all primary electrical specifications. Forward voltage is specified at 800 mV @ 20 A, representing a 80 mV increase over the onsemi specification. This part is suitable for applications where this forward voltage variation is acceptable within design margins.

Similar Substitute Selection:

Parts with reduced current ratings (DSSK40-006B at 20 A, STPS4045CWY at 20 A, VS-40L45CW-N3 at 20 A) are suitable only for applications where the design current requirement does not exceed 20 A per diode.

Parts with reduced voltage ratings (DSSK60-0045A and DSSK60-0045B at 45 V) are suitable only for applications where the design voltage requirement does not exceed 45 V.

Parts with elevated voltage ratings (DSSK70-008A at 80 V, MBR40H100WTG at 100 V) are suitable for applications requiring higher voltage margins. MBR40H100WTG is classified as Obsolete and should not be selected for new designs.

All substitute parts listed maintain ROHS3 compliance and fast recovery Schottky technology characteristics.

Frequently Asked Questions (FAQ)

Q: Can the MBR4050PT-E3/45 be used as a direct replacement for the MBR4050PT?

A: Yes. The MBR4050PT-E3/45 is a direct equivalent with identical electrical specifications (50 V, 40 A, 720 mV forward voltage) and Active product status. The TO-3P-3 and SC-65-3 package designations are mechanically compatible with TO-247-3 mounting requirements.

Q: What is the difference between the MBR4050PT and the MBR4050PT manufactured by Diodes Incorporated?

A: Both parts share the same part number and electrical ratings (50 V, 40 A). The Diodes Incorporated version specifies forward voltage at 800 mV @ 20 A compared to 720 mV @ 20 A for the onsemi version. This 80 mV difference must be evaluated against circuit design margins. Both are classified as Active.

Q: Can STPS4045CWY or VS-40L45CW-N3 be used as substitutes?

A: These parts are suitable only if the application design allows for reduced current rating (20 A per diode instead of 40 A) and reduced voltage rating (45 V instead of 50 V). Both parts are classified as Active and meet Schottky diode array configuration requirements.

Q: Why is DSSK60-0045A listed as a similar substitute despite lower current rating?

A: DSSK60-0045A maintains the 1 Pair Common Cathode Schottky configuration and through-hole TO-247-3 mounting. The 30 A current rating and 45 V voltage rating represent reductions from the MBR4050PT specification. This part is suitable only for applications where these reduced ratings are acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference maintain ROHS3 compliance status.

Q: What is the significance of the MBR40H100WTG listing?

A: The MBR40H100WTG is classified as Obsolete and is included for reference only. This part should not be selected for new designs. It is listed because it shares the 1 Pair Common Cathode Schottky configuration and through-hole mounting, but with elevated voltage (100 V) and reduced current (20 A) ratings.

Q: Can parts with higher voltage ratings (80 V or 100 V) be used in place of the 50 V MBR4050PT?

A: Parts with higher voltage ratings such as DSSK70-008A (80 V) are electrically compatible in applications where the circuit design permits higher voltage components. However, current rating reductions must be evaluated. DSSK70-008A provides 35 A per diode, which is below the 40 A specification of the MBR4050PT.

Q: What package considerations apply to substitution?

A: All listed parts utilize through-hole mounting in TO-247-3 or mechanically equivalent packages (TO-3P-3, SC-65-3). PCB layout and thermal management considerations remain consistent across these package types. Mechanical fit and thermal interface requirements should be verified against specific application requirements.

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