MBRP745TU Equivalent & Substitute Parts

Part Overview

The MBRP745TU is a Schottky rectifier diode manufactured by onsemi, rated for 45 V DC reverse voltage and 7.5 A average rectified current in a TO-220-2 through-hole package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Active alternatives with identical or enhanced electrical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	7.5 A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 7.5 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 45 V
Mounting Type	Through Hole
Package / Case	TO-220-2
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the MBRP745TU is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io): 7.5 A minimum
Technology: Schottky
Mounting Type: Through Hole
Package / Case: TO-220-2

Secondary Compatibility Factors:

Fast Recovery speed characteristic (≤ 500ns, > 200mA)
Operating temperature range compatibility
Forward voltage characteristics at rated current

Substitute parts are grouped into two categories: direct equivalents matching the 7.5 A rating, and higher-current alternatives that maintain the 45 V voltage specification and TO-220-2 package format. Higher-current devices provide design flexibility for applications requiring increased current capacity while maintaining voltage and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Product Status
MBRP745TU	onsemi	45 V	7.5	650 mV @ 7.5 A	1 mA @ 45 V	-65°C ~ 150°C	Obsolete
MBR745G	onsemi	45 V	7.5	840 mV @ 15 A	100 µA @ 45 V	-65°C ~ 175°C	Active
MBR745-E3/45	Vishay General Semiconductor - Diodes Division	45 V	7.5	840 mV @ 15 A	100 µA @ 45 V	-65°C ~ 175°C	Active
STPS745D	STMicroelectronics	45 V	7.5	840 mV @ 15 A	100 µA @ 45 V	-55°C ~ 175°C	Active
DSS10-0045B	IXYS	45 V	10	510 mV @ 10 A	5 mA @ 45 V	-55°C ~ 150°C	Active
DSS10-0045A	IXYS	45 V	10	680 mV @ 10 A	300 µA @ 45 V	-55°C ~ 175°C	Active
MBR1045	Taiwan Semiconductor Corporation	45 V	10	700 mV @ 10 A	100 µA @ 45 V	-55°C ~ 150°C	Active
DSA15I45PA	IXYS	45 V	15	750 mV @ 15 A	500 µA @ 45 V	-55°C ~ 175°C	Active
DSS16-0045B	IXYS	45 V	16	480 mV @ 15 A	10 mA @ 45 V	-55°C ~ 150°C	Active
DSS25-0045A	IXYS	45 V	25	690 mV @ 25 A	1 mA @ 45 V	-55°C ~ 175°C	Active
MBR745HC0G	Taiwan Semiconductor Corporation	50 V	7.5	840 mV @ 15 A	100 µA @ 50 V	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Equivalents (7.5 A Rating):

MBR745G, MBR745-E3/45, and STPS745D are direct functional equivalents to the MBRP745TU. All three maintain the 45 V voltage specification and 7.5 A current rating with TO-220-2 package compatibility. These parts are manufactured by onsemi, Vishay, and STMicroelectronics respectively, all with active product status and RoHS3 compliance. MBR745G and MBR745-E3/45 extend the operating temperature range to -65°C ~ 175°C compared to the original -65°C ~ 150°C specification. STPS745D provides the highest inventory availability at 16,973 pieces.

Higher Current Alternatives (10 A and Above):

For applications requiring increased current capacity, DSS10-0045B, DSS10-0045A, MBR1045, DSA15I45PA, DSS16-0045B, and DSS25-0045A maintain the 45 V voltage specification while providing 10 A to 25 A current ratings. These parts are suitable for designs where the original 7.5 A specification can be exceeded. All are active products with RoHS3 compliance.

Voltage-Enhanced Alternative:

MBR745HC0G provides a 50 V voltage rating with identical 7.5 A current capacity, offering enhanced voltage margin. This part includes AEC-Q101 automotive qualification and is suitable for applications requiring higher voltage headroom.

Compliance and Availability:

All substitute parts listed are RoHS3 compliant and REACH unaffected. Inventory availability ranges from 778 to 16,973 pieces across the substitute options, ensuring procurement feasibility.

Frequently Asked Questions (FAQ)

Q: Can MBR745G directly replace MBRP745TU in existing designs?

A: Yes. MBR745G maintains identical voltage (45 V) and current (7.5 A) specifications with TO-220-2 package compatibility. The part is manufactured by onsemi and is active. Operating temperature range extends to 175°C compared to the original 150°C maximum.

Q: What is the difference between DSS10-0045A and DSS10-0045B?

A: Both are 45 V, 10 A IXYS Schottky diodes in TO-220-2 packages. DSS10-0045B exhibits lower forward voltage (510 mV @ 10 A) compared to DSS10-0045A (680 mV @ 10 A), resulting in reduced power dissipation. DSS10-0045B has higher reverse leakage (5 mA @ 45 V) versus DSS10-0045A (300 µA @ 45 V).

Q: Is MBR745HC0G suitable as a substitute despite the 50 V rating?

A: Yes, for applications where the original 45 V specification is not a limiting constraint. MBR745HC0G provides enhanced voltage margin at 50 V while maintaining 7.5 A current capacity and TO-220-2 package format. The part includes AEC-Q101 automotive qualification.

Q: What are the advantages of higher-current alternatives like DSS25-0045A?

A: Higher-current alternatives provide design flexibility for applications where current requirements may increase or where thermal margin is desired. DSS25-0045A maintains 45 V voltage specification and TO-220-2 package while offering 25 A capacity, allowing single-device solutions for higher-power designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of fast recovery speed specification?

A: Fast recovery speed (≤ 500ns, > 200mA) is maintained across all substitute parts, ensuring compatibility with high-frequency switching applications. This characteristic is critical for rectifier performance in power conversion circuits.

Q: Can I use STPS745D as a drop-in replacement?

A: Yes. STPS745D is manufactured by STMicroelectronics with identical 45 V, 7.5 A specifications and TO-220-2 package. The part is active with the highest inventory availability (16,973 pieces) among direct equivalents.

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