MBR3045PTH Equivalent & Substitute Parts

Part Overview

The MBR3045PTH is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, 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 format and qualified to AEC-Q101 automotive standards. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
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	820 mV @ 30 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-247-3
RoHS Status	ROHS3 Compliant
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the MBR3045PTH is determined by the following critical parameters:

Primary Substitution 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 Factors:

Current - Average Rectified (Io) (per Diode): 30 A or higher
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
RoHS Status: ROHS3 Compliant
Operating Temperature Range: -55°C to 150°C or higher

Parts are grouped into two categories:

Parametric Equivalent: MBR3045PT (Solid State Inc.) matches all primary criteria with identical 30 A current rating and maintains full electrical and mechanical compatibility.

Similar Parts: DSSK60-0045B, STPS3045CW, STPS30L45CW, STPS4045CW, STPS40L45CW, STPS6045CW, STPS60L45CW, STPS61L45CW, and VS-40L45CW-N3 share the core configuration, voltage rating, and package but differ in current ratings (15 A, 20 A, or 30 A) and forward voltage characteristics. These parts are suitable for applications where the current requirement does not exceed the substitute part's rating.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Package	Temp Range (Max)	Product Status
MBR3045PTH	Taiwan Semiconductor Corporation	45 V	30 A	820 mV @ 30 A	TO-247-3	-55°C ~ 150°C	Discontinued
MBR3045PT	Solid State Inc.	45 V	30 A	Not specified	TO-247-3	Not specified	Active
DSSK60-0045B	IXYS	45 V	30 A	500 mV @ 30 A	TO-247-3	-55°C ~ 150°C	Active
STPS3045CW	STMicroelectronics	45 V	15 A	570 mV @ 15 A	TO-247-3	200°C (Max)	Active
STPS30L45CW	STMicroelectronics	45 V	15 A	550 mV @ 15 A	TO-247-3	150°C (Max)	Active
STPS4045CW	STMicroelectronics	45 V	20 A	760 mV @ 20 A	TO-247-3	175°C (Max)	Active
STPS40L45CW	STMicroelectronics	45 V	20 A	530 mV @ 20 A	TO-247-3	150°C (Max)	Active
STPS6045CW	STMicroelectronics	45 V	30 A	630 mV @ 30 A	TO-247-3	175°C (Max)	Active
STPS60L45CW	STMicroelectronics	45 V	30 A	550 mV @ 30 A	TO-247-3	150°C (Max)	Active
STPS61L45CW	STMicroelectronics	45 V	30 A	560 mV @ 30 A	TO-247-3	150°C (Max)	Active
VS-40L45CW-N3	Vishay General Semiconductor - Diodes Division	45 V	20 A	530 mV @ 20 A	TO-247-3	150°C (Max)	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

MBR3045PT from Solid State Inc. is the parametric equivalent with matching 30 A current rating and TO-247-3 package. This part is currently active in inventory with 19,586 units available. Selection of this part requires no circuit redesign and maintains identical electrical performance envelope.

Full-Rated Substitutes (30 A Current Rating):

DSSK60-0045B (IXYS), STPS6045CW (STMicroelectronics), STPS60L45CW (STMicroelectronics), and STPS61L45CW (STMicroelectronics) all support the full 30 A current specification. These parts are active with inventory availability ranging from 1,410 to 2,200 units. DSSK60-0045B exhibits lower forward voltage (500 mV @ 30 A) compared to the original specification (820 mV @ 30 A), resulting in reduced power dissipation. STPS60L45CW and STPS61L45CW offer forward voltage of 550 mV and 560 mV respectively, providing intermediate performance. All maintain ROHS3 compliance and fast recovery characteristics.

Reduced-Current Substitutes (15 A or 20 A Rating):

STPS3045CW, STPS30L45CW, STPS4045CW, STPS40L45CW, and VS-40L45CW-N3 are suitable only for applications where the circuit current requirement does not exceed 15 A or 20 A respectively. These parts are not suitable for direct replacement in circuits requiring the full 30 A capability. Selection of reduced-current parts requires circuit analysis to confirm current margins.

Compliance and Qualification:

All substitute parts maintain ROHS3 compliance. The original MBR3045PTH carries AEC-Q101 automotive qualification. Among substitutes, only DSSK60-0045B explicitly states REACH Unaffected status matching the original. Substitutes from STMicroelectronics and Vishay indicate REACH Unaffected status. Solid State Inc. MBR3045PT lists REACH status as Vendor Undefined. For automotive applications requiring AEC-Q101 qualification, verification of substitute part qualification status is necessary prior to design release.

Frequently Asked Questions (FAQ)

Q: Can MBR3045PT be used as a direct replacement for MBR3045PTH?

A: Yes. MBR3045PT is the parametric equivalent with identical diode configuration (1 pair common cathode), voltage rating (45 V), current rating (30 A), and package (TO-247-3). No circuit modifications are required.

Q: What is the difference between the "L" and non-"L" variants in the STMicroelectronics product line?

A: The "L" designation indicates low forward voltage variants. For example, STPS40L45CW exhibits 530 mV forward voltage at 20 A, while STPS4045CW exhibits 760 mV at the same current. Both maintain identical voltage and current ratings and package specifications.

Q: Can STPS6045CW replace MBR3045PTH in all applications?

A: STPS6045CW matches the 30 A current rating and 45 V voltage specification with TO-247-3 packaging. The forward voltage is 630 mV @ 30 A compared to 820 mV @ 30 A for the original part, resulting in lower power dissipation. Operating temperature maximum is 175°C versus 150°C for the original. Substitution is valid for applications within these electrical parameters.

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

A: These parts share the same diode configuration, voltage rating, package, and fast recovery characteristics as the MBR3045PTH. They are listed as similar parts because they are compatible in applications where circuit current does not exceed 15 A. For circuits requiring 30 A operation, these parts are not suitable.

Q: What is the significance of the TO-247-3 package designation?

A: TO-247-3 is a through-hole package with three leads suitable for high-current applications. All listed substitute parts use this identical package, ensuring mechanical and thermal compatibility without PCB redesign.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the original MBR3045PTH specification.

Q: What should be verified before selecting a substitute part for automotive applications?

A: For automotive applications, verify that the substitute part maintains AEC-Q101 qualification status. Additionally, confirm that the forward voltage and reverse leakage current specifications are acceptable for the circuit design, as these parameters vary among substitutes despite matching voltage and current ratings.

Q: Can VS-40L45CW-N3 be used in place of MBR3045PTH?

A: VS-40L45CW-N3 has a 20 A current rating, which is lower than the 30 A specification of MBR3045PTH. This part is suitable only for applications where circuit current does not exceed 20 A. For circuits requiring 30 A operation, this part is not suitable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message