MBR2045PTH Equivalent & Substitute Parts

Part Overview

The MBR2045PTH is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as a 1 Pair Common Cathode with a maximum reverse voltage of 45 V and average rectified current of 20 A per diode. The device is packaged in TO-247-3 through-hole configuration and is qualified to AEC-Q101 automotive standards.

The MBR2045PTH has been discontinued at DiGi Electronics. Equivalent and substitute parts are available from active product lines that maintain the same or compatible electrical and mechanical specifications, enabling direct replacement in existing designs.

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)	20 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 20 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-247-3
RoHS Status	ROHS3 Compliant
Grade	Automotive (AEC-Q101)

Substitute Part Grouping Explanation

Substitution of the MBR2045PTH is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Mounting Type: Through Hole
Package / Case: TO-247-3

Current Rating Considerations: Substitute parts are grouped by average rectified current capacity. The MBR2045PTH operates at 20 A per diode. Direct equivalents maintain this 20 A rating. Parts with lower current ratings (15 A) are suitable for applications with reduced current requirements. Parts with higher current ratings (30 A) provide additional margin but remain electrically compatible.

Electrical Performance Parameters: Forward voltage drop (Vf), reverse leakage current, and operating temperature range vary among substitute parts. These parameters affect thermal performance and efficiency but do not prevent functional substitution when the reverse voltage and current ratings are met or exceeded.

Compliance and Status: The MBR2045PTH is discontinued. Active substitute parts maintain ROHS3 compliance and automotive-grade qualification where applicable, ensuring regulatory and quality continuity.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Io (per Diode)	Vf (Max) @ If	Ir @ 45V	Tj (Max)	Product Status
MBR2045PTH	Taiwan Semiconductor Corporation	20 A	840 mV @ 20 A	100 µA	150°C	Discontinued
MBR2045PT C0G	Taiwan Semiconductor Corporation	20 A	840 mV @ 20 A	100 µA	150°C	Active
STPS3045CW	STMicroelectronics	15 A	570 mV @ 15 A	200 µA	200°C	Active
STPS30L45CW	STMicroelectronics	15 A	550 mV @ 15 A	400 µA	150°C	Active
STPS4045CW	STMicroelectronics	20 A	760 mV @ 20 A	200 µA	175°C	Active
STPS40L45CW	STMicroelectronics	20 A	530 mV @ 20 A	600 µA	150°C	Active
STPS6045CW	STMicroelectronics	30 A	630 mV @ 30 A	500 µA	175°C	Active
STPS60L45CW	STMicroelectronics	30 A	550 mV @ 30 A	1.5 mA	150°C	Active
STPS61L45CW	STMicroelectronics	30 A	560 mV @ 30 A	1.5 mA	150°C	Active
VS-40L45CW-N3	Vishay General Semiconductor - Diodes Division	20 A	530 mV @ 20 A	1.5 mA	150°C	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

MBR2045PT C0G is the direct parametric equivalent to MBR2045PTH, manufactured by Taiwan Semiconductor Corporation. This part maintains identical electrical specifications and is currently in active production status. Selection of this part ensures no design modification is required.

20 A Current Rating Alternatives:

STPS4045CW, STPS40L45CW, and VS-40L45CW-N3 are active alternatives rated at 20 A per diode with 45 V reverse voltage rating. These parts are electrically compatible with the MBR2045PTH and maintain the same TO-247-3 package configuration. All three parts are ROHS3 compliant. STPS4045CW and STPS40L45CW are manufactured by STMicroelectronics. VS-40L45CW-N3 is manufactured by Vishay General Semiconductor - Diodes Division.

Higher Current Rating Alternatives:

STPS6045CW, STPS60L45CW, and STPS61L45CW are rated at 30 A per diode with 45 V reverse voltage rating. These parts provide increased current capacity and are suitable for applications requiring additional thermal margin or higher current handling. All three parts maintain TO-247-3 package compatibility and ROHS3 compliance.

Lower Current Rating Alternatives:

STPS3045CW and STPS30L45CW are rated at 15 A per diode with 45 V reverse voltage rating. These parts are suitable for applications with reduced current requirements and provide lower forward voltage drop characteristics. Both parts are ROHS3 compliant and maintain TO-247-3 package compatibility.

Compliance Considerations:

All substitute parts listed maintain ROHS3 compliance and are rated for automotive applications. The MBR2045PTH carries AEC-Q101 qualification. Substitute parts from STMicroelectronics and Vishay are established suppliers in automotive-grade component markets.

Frequently Asked Questions (FAQ)

Q: Can MBR2045PT C0G be used as a direct replacement for MBR2045PTH?

A: Yes. MBR2045PT C0G is the direct parametric equivalent with identical electrical specifications, diode configuration, package type, and operating temperature range. No circuit modification is required.

Q: What is the difference between 20 A and 30 A rated parts?

A: The 30 A rated parts (STPS6045CW, STPS60L45CW, STPS61L45CW) have higher average rectified current capacity per diode. These parts are electrically compatible with the MBR2045PTH in 20 A applications and provide additional thermal margin. The 45 V reverse voltage rating remains constant across all parts.

Q: Can I use a 15 A rated part in place of the MBR2045PTH?

A: A 15 A rated part (STPS3045CW or STPS30L45CW) is suitable only if the application current requirement does not exceed 15 A per diode. The 45 V reverse voltage rating is maintained. Forward voltage drop and reverse leakage characteristics differ from the MBR2045PTH and should be evaluated for thermal performance impact.

Q: Are all substitute parts in the same TO-247-3 package?

A: Yes. All substitute parts listed are packaged in TO-247-3 through-hole configuration, enabling direct mechanical replacement on existing printed circuit boards.

Q: What is the difference between STPS40L45CW and STPS4045CW?

A: Both parts are rated at 20 A per diode with 45 V reverse voltage. STPS40L45CW has lower forward voltage drop (530 mV @ 20 A) compared to STPS4045CW (760 mV @ 20 A), resulting in reduced power dissipation. STPS4045CW has a higher maximum junction temperature rating (175°C vs. 150°C).

Q: Are these parts suitable for automotive applications?

A: All substitute parts are ROHS3 compliant and manufactured by established automotive-grade component suppliers. The MBR2045PTH carries AEC-Q101 qualification. Substitute parts from STMicroelectronics and Vishay are qualified for automotive use.

Q: What is the significance of the "L" designation in part numbers like STPS40L45CW?

A: The "L" designation indicates a low forward voltage drop variant. STPS40L45CW exhibits lower forward voltage (530 mV @ 20 A) compared to STPS4045CW (760 mV @ 20 A), reducing thermal dissipation in high-current applications.

Q: Can I mix different substitute parts in the same circuit?

A: All substitute parts maintain the same 45 V reverse voltage rating and TO-247-3 package configuration. Mixing parts with different current ratings or forward voltage characteristics is permissible from a functional standpoint, but thermal design analysis should account for variations in power dissipation across different part types.

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