MBRP3045NTU Equivalent & Substitute Parts

Part Overview

The MBRP3045NTU is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 15 A average rectified current per diode. Manufactured by onsemi, this component is packaged in TO-220-3 through-hole format and is currently classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the same electrical specifications and mechanical form factor while offering active product status and continued availability.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	15	A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 15 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1	mA @ 45 V
Operating Temperature - Junction	−65 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MBRP3045NTU is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io) (per Diode): 15 A
Mounting Type: Through Hole
Package / Case: TO-220-3

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Must not exceed 650 mV @ 15 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: Must not exceed 1 mA @ 45 V
Operating Temperature - Junction: Must encompass −65°C to 150°C range
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts are grouped into two categories:

Parametric Equivalent: Parts that match all primary and secondary criteria with identical electrical performance specifications.

Similar Parts: Parts that maintain the same diode configuration, technology, reverse voltage, and package, but differ in current rating or forward voltage characteristics. These parts are suitable for applications with lower current requirements or where forward voltage variations are acceptable within system design margins.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Diode Configuration	Technology	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Package	Product Status
MBRP3045NTU	onsemi	1 Pair Common Cathode	Schottky	45 V	15 A	650 mV @ 15 A	1 mA @ 45 V	−65 to 150°C	TO-220-3	Obsolete
MBRP3045NTU (Fairchild)	Fairchild Semiconductor	1 Pair Common Cathode	Schottky	45 V	15 A	650 mV @ 15 A	1 mA @ 45 V	−65 to 150°C	TO-220-3	Active
DSA20C45PB	IXYS	1 Pair Common Cathode	Schottky	45 V	10 A	750 mV @ 10 A	200 µA @ 45 V	−55 to 175°C	TO-220-3	Active
DSA30C45PB	IXYS	1 Pair Common Cathode	Schottky	45 V	15 A	750 mV @ 15 A	300 µA @ 45 V	−55 to 175°C	TO-220-3	Active
DSA60C45PB	IXYS	1 Pair Common Cathode	Schottky	45 V	30 A	790 mV @ 30 A	900 µA @ 45 V	−55 to 175°C	TO-220-3	Active
DSB30C45PB	IXYS	1 Pair Common Cathode	Schottky	45 V	15 A	590 mV @ 15 A	10 mA @ 45 V	−55 to 150°C	TO-220-3	Active
DSB60C45PB	IXYS	1 Pair Common Cathode	Schottky	45 V	30 A	630 mV @ 30 A	10 mA @ 45 V	−55 to 150°C	TO-220-3	Active
DSSK20-0045B	IXYS	1 Pair Common Cathode	Schottky	45 V	10 A	510 mV @ 10 A	5 mA @ 45 V	−55 to 150°C	TO-220-3	Active
VS-MBR3045CT-M3	Vishay General Semiconductor - Diodes Division	1 Pair Common Cathode	Schottky	45 V	15 A	760 mV @ 30 A	1 mA @ 45 V	−65 to 150°C	TO-220-3	Active
STPS3045CT	STMicroelectronics	1 Pair Common Cathode	Schottky	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	−40 to 200°C	TO-220-3	Active

Engineering Selection Recommendations

Parametric Equivalent Selection:

The MBRP3045NTU (Fairchild Semiconductor) is the direct parametric equivalent. This part maintains identical electrical specifications and operating temperature range while offering active product status. Both parts are ROHS3 compliant with MSL 1 (Unlimited) rating. Selection of this equivalent is appropriate for direct replacement in existing designs.

Active Substitute Selection for 15 A Applications:

For applications requiring 15 A average rectified current per diode with 45 V reverse voltage rating in TO-220-3 package:

DSA30C45PB (IXYS): Maintains 15 A current rating with extended operating temperature range (−55 to 175°C). Forward voltage is 750 mV @ 15 A, which is 100 mV higher than the original specification. Reverse leakage is 300 µA @ 45 V, which is within acceptable limits for most applications.
DSB30C45PB (IXYS): Maintains 15 A current rating with forward voltage of 590 mV @ 15 A, which is superior to the original 650 mV specification. Operating temperature range is −55 to 150°C. Reverse leakage is 10 mA @ 45 V, which is higher than the original specification.
VS-MBR3045CT-M3 (Vishay General Semiconductor - Diodes Division): Maintains 15 A current rating with operating temperature range of −65 to 150°C, matching the original specification. Reverse leakage is 1 mA @ 45 V, identical to the original part. Forward voltage specification is 760 mV @ 30 A.
STPS3045CT (STMicroelectronics): Maintains 15 A current rating with superior forward voltage of 570 mV @ 15 A. Operating temperature range extends to 200°C maximum. Reverse leakage is 200 µA @ 45 V. This part offers the lowest forward voltage among active substitutes.

Lower Current Alternatives (10 A Rating):

For applications where 10 A average rectified current per diode is sufficient:

DSA20C45PB (IXYS): 10 A rating with 45 V reverse voltage. Forward voltage is 750 mV @ 10 A. Operating temperature range is −55 to 175°C.
DSSK20-0045B (IXYS): 10 A rating with 45 V reverse voltage. Forward voltage is 510 mV @ 10 A, the lowest among 10 A options. Operating temperature range is −55 to 150°C.

Higher Current Alternatives (30 A Rating):

For applications requiring higher current capacity:

DSA60C45PB (IXYS): 30 A rating with 45 V reverse voltage. Forward voltage is 790 mV @ 30 A. Operating temperature range is −55 to 175°C.
DSB60C45PB (IXYS): 30 A rating with 45 V reverse voltage. Forward voltage is 630 mV @ 30 A, superior to DSA60C45PB. Operating temperature range is −55 to 150°C.

All recommended substitutes are ROHS3 compliant with MSL 1 (Unlimited) rating and maintain the same TO-220-3 through-hole package configuration.

Frequently Asked Questions (FAQ)

Q: Can DSA30C45PB be used as a direct replacement for MBRP3045NTU?

A: DSA30C45PB maintains the same diode configuration (1 Pair Common Cathode), technology (Schottky), reverse voltage (45 V), current rating (15 A), and package (TO-220-3). The forward voltage is 750 mV @ 15 A compared to 650 mV @ 15 A for the original part. This 100 mV difference must be evaluated within the specific application circuit. The extended operating temperature range (−55 to 175°C) provides additional thermal margin compared to the original −65 to 150°C specification.

Q: What is the difference between DSB30C45PB and DSA30C45PB?

A: Both parts maintain 15 A current rating and 45 V reverse voltage in TO-220-3 package. DSB30C45PB has a forward voltage of 590 mV @ 15 A, which is lower than DSA30C45PB at 750 mV @ 15 A. DSB30C45PB has higher reverse leakage at 10 mA @ 45 V compared to DSA30C45PB at 300 µA @ 45 V. Both have identical operating temperature range of −55 to 150°C.

Q: Is STPS3045CT suitable for high-temperature applications?

A: STPS3045CT has a maximum junction temperature of 200°C, which exceeds the original MBRP3045NTU specification of 150°C. This part is suitable for applications requiring extended high-temperature operation. All other electrical parameters match the 15 A, 45 V specification with superior forward voltage performance at 570 mV @ 15 A.

Q: Can I use a 10 A rated part in place of the 15 A MBRP3045NTU?

A: Parts rated for 10 A average rectified current (DSA20C45PB, DSSK20-0045B) can be used only in applications where the actual current requirement does not exceed 10 A per diode. The 15 A rating of the original part indicates the design supports higher current levels. Using a lower-rated part in a 15 A application will result in component overstress and potential failure.

Q: What is the advantage of using a 30 A rated part like DSA60C45PB?

A: A 30 A rated part provides additional current capacity margin for applications that may experience transient current spikes or future design modifications requiring higher current. The trade-off is typically higher forward voltage (790 mV @ 30 A for DSA60C45PB) and higher reverse leakage (900 µA @ 45 V) compared to the 15 A rated alternatives.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the environmental compliance of the original MBRP3045NTU.

Q: Does the TO-220-3 package remain the same across all substitutes?

A: Yes, all substitute parts maintain the TO-220-3 through-hole package configuration, ensuring mechanical compatibility with existing PCB layouts and thermal management solutions.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current affects power dissipation and circuit performance at maximum reverse voltage. The original MBRP3045NTU specifies 1 mA @ 45 V. Substitutes with lower reverse leakage (DSSK20-0045B at 5 mA, DSA20C45PB at 200 µA, STPS3045CT at 200 µA) provide better performance in low-power or precision applications. Parts with higher reverse leakage (DSA30C45PB at 300 µA, DSB30C45PB at 10 mA, DSA60C45PB at 900 µA) are acceptable in applications where this parameter is not critical.

Q: How does forward voltage affect circuit design?

A: Forward voltage determines the voltage drop across the diode during conduction. Lower forward voltage reduces power dissipation and heat generation. STPS3045CT offers the lowest forward voltage at 570 mV @ 15 A, while DSA60C45PB offers the highest at 790 mV @ 30 A. Circuit designs must account for these voltage drops in power supply regulation and thermal management calculations.

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