MBR3050PT Equivalent & Substitute Parts

Part Overview

The MBR3050PT is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode with a maximum reverse voltage of 50 V and average rectified current of 30 A per diode. The device is packaged in TO-3P-3 (SC-65-3) through-hole configuration and is classified as Active product status with ROHS3 compliance. Substitute parts are necessary when TO-3P-3 package availability is limited, when alternative thermal or electrical performance characteristics are required, or when design specifications permit operation at reduced voltage or current ratings within the same Schottky diode array category.

Key Parameters

Parameter	MBR3050PT
Manufacturer	Diodes Incorporated
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io) (per Diode)	30 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 30 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 mA @ 50 V
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-3P-3, SC-65-3
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the MBR3050PT is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), technology (Schottky), mounting type (Through Hole), and compliance certifications (ROHS3). All substitute parts listed maintain these core characteristics.

The substitute parts are grouped into two categories based on electrical performance:

Category A - Reduced Current Rating (15 A): STPS3045CW and STPS30L45CW operate at 15 A average rectified current, representing a 50% reduction from the MBR3050PT specification. These parts are suitable for applications where current requirements do not exceed 15 A per diode.

Category B - Matched or Intermediate Current Rating (20 A - 30 A): STPS4045CWY operates at 20 A average rectified current, and STPS60L45CW operates at 30 A average rectified current, matching the MBR3050PT current specification. These parts accommodate applications requiring higher current capacity.

All substitute parts operate at 45 V maximum reverse voltage, which is 5 V lower than the MBR3050PT. Substitution is valid only when circuit design specifications permit operation within the 45 V reverse voltage limit.

Parameter Comparison

Parameter	MBR3050PT	STPS3045CW	STPS30L45CW	STPS4045CWY	STPS60L45CW
Manufacturer	Diodes Incorporated	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Diode Configuration	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
Voltage - DC Reverse (Vr) (Max)	50 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	30 A	15 A	15 A	20 A	30 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 30 A	570 mV @ 15 A	550 mV @ 15 A	760 mV @ 20 A	550 mV @ 30 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)
Current - Reverse Leakage @ Vr	5 mA @ 50 V	200 µA @ 45 V	400 µA @ 45 V	200 µA @ 45 V	1.5 mA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C	200°C (Max)	150°C (Max)	-40°C ~ 175°C	150°C (Max)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-3P-3, SC-65-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

STPS60L45CW is the primary substitute for the MBR3050PT when package form factor change from TO-3P-3 to TO-247-3 is acceptable. This part maintains the 30 A average rectified current specification and operates within the same thermal range (-65°C to 150°C maximum junction temperature). Both parts are Active status with ROHS3 compliance. The STPS60L45CW operates at 45 V maximum reverse voltage, requiring circuit design verification that the 5 V reduction from the MBR3050PT specification does not exceed application limits.

STPS4045CWY is suitable for applications requiring 20 A average rectified current with automotive-grade qualification (AEC-Q101) and extended operating temperature range (-40°C to 175°C). This part is appropriate when automotive reliability standards are required and current requirements do not exceed 20 A per diode.

STPS3045CW and STPS30L45CW are suitable only for applications where average rectified current does not exceed 15 A per diode. Both parts are Active status with ROHS3 compliance. STPS30L45CW offers lower forward voltage (550 mV @ 15 A) compared to STPS3045CW (570 mV @ 15 A), resulting in reduced power dissipation in current-limited applications.

All substitute parts require PCB layout modification to accommodate TO-247-3 package geometry in place of TO-3P-3 package.

Frequently Asked Questions (FAQ)

Q: Can STPS60L45CW directly replace MBR3050PT without circuit modification?

A: STPS60L45CW maintains the 30 A average rectified current and Schottky diode array configuration. However, the maximum reverse voltage is 45 V compared to 50 V for MBR3050PT. Circuit design must confirm that reverse voltage stress does not exceed 45 V. Additionally, PCB layout modification is required to accommodate TO-247-3 package in place of TO-3P-3 package.

Q: What is the difference between STPS3045CW and STPS30L45CW?

A: Both parts operate at 15 A average rectified current and 45 V maximum reverse voltage in TO-247-3 package. STPS30L45CW provides lower forward voltage (550 mV @ 15 A) compared to STPS3045CW (570 mV @ 15 A). STPS3045CW specifies maximum junction temperature of 200°C, while STPS30L45CW specifies 150°C maximum.

Q: Is STPS4045CWY suitable for non-automotive applications?

A: STPS4045CWY is qualified to AEC-Q101 automotive standard and operates at 20 A average rectified current. The part is Active status and ROHS3 compliant. Non-automotive applications may use this part if the 20 A current rating and 45 V reverse voltage specification meet design requirements. Automotive qualification does not restrict use in non-automotive applications.

Q: Why do all substitute parts operate at 45 V instead of 50 V?

A: The substitute parts listed (STPS3045CW, STPS30L45CW, STPS4045CWY, STPS60L45CW) are manufactured by STMicroelectronics and are specified at 45 V maximum reverse voltage. Substitution is valid only when circuit design permits operation within the 45 V limit. Applications requiring 50 V reverse voltage rating must retain the MBR3050PT or identify alternative parts with matching voltage specification.

Q: What package considerations apply when substituting MBR3050PT with TO-247-3 alternatives?

A: MBR3050PT uses TO-3P-3 (SC-65-3) package, while all listed substitutes use TO-247-3 package. These packages have different physical dimensions, pin spacing, and mounting hole patterns. PCB redesign is required to accommodate the TO-247-3 package. Thermal management characteristics differ between packages; TO-247-3 typically provides lower thermal resistance than TO-3P-3 in many applications.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed (STPS3045CW, STPS30L45CW, STPS4045CWY, STPS60L45CW) are ROHS3 compliant, matching the MBR3050PT compliance status. All parts are Active product status.

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