MBR3045CT-E1 Equivalent & Substitute Parts

Part Overview

The MBR3045CT-E1 is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with 45 V reverse voltage rating and 15 A average rectified current per diode. The device is packaged in TO-220-3 through-hole format and features fast recovery characteristics with switching speed ≤ 500 ns at currents > 200 mA.

The MBR3045CT-E1 is classified as obsolete. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production builds and field replacements.

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	700 mV @ 15 A	—
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 45 V
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MBR3045CT-E1 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
Current - Average Rectified (Io) (per Diode): 15 A
Mounting Type: Through Hole
Package / Case: TO-220-3

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Acceptable range 550 mV to 750 mV @ 15 A
Current - Reverse Leakage @ Vr: Acceptable range 50 µA to 500 µA @ 45 V
Operating Temperature - Junction: Minimum -55°C, Maximum 150°C or higher
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Substitute parts must maintain identical diode configuration, technology type, reverse voltage rating, and current rating. Forward voltage drop and reverse leakage current variations within specified ranges do not preclude substitution. Operating temperature range may exceed the original specification. All substitute parts must comply with RoHS3 and maintain TO-220-3 through-hole packaging.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Tj (Min-Max) [°C]	Product Status
MBR3045CT-E1	Diodes Incorporated	45	15	700 @ 15 A	100 @ 45 V	-65 to 150	Obsolete
DSA30C45PB	IXYS	45	15	750 @ 15 A	300 @ 45 V	-55 to 175	Active
DSB60C45PB	IXYS	45	30	630 @ 30 A	10 @ 45 V	-55 to 150	Active
DSSK28-0045A	IXYS	45	15	670 @ 15 A	500 @ 45 V	-55 to 175	Active
MBR3045CT-BP	Micro Commercial Co	45	15	700 @ 15 A	200 @ 45 V	-55 to 150	Active
MBR3045CTE3/TU	Microchip Technology	45	15	700 @ 15 A	50 @ 45 V	-65 to 175	Active
STPS30L45CT	STMicroelectronics	45	15	550 @ 15 A	400 @ 45 V	—	Active

Engineering Selection Recommendations

Primary Equivalent (Parametric Match): The MBR3045CT-BP manufactured by Micro Commercial Co is the primary parametric equivalent. This part maintains identical electrical specifications at the rated 15 A current level, matching the forward voltage drop of 700 mV @ 15 A and operating temperature range of -55°C to 150°C. The part is in active production status with RoHS3 compliance and REACH unaffected designation.

Direct Functional Equivalent (Identical Ratings): The DSSK28-0045A manufactured by IXYS provides identical 45 V reverse voltage and 15 A current ratings with forward voltage of 670 mV @ 15 A. This part is in active production with extended operating temperature range to 175°C and RoHS3 compliance.

Higher Current Capability Alternative: The DSA30C45PB and DSB60C45PB manufactured by IXYS provide 30 A current capability while maintaining 45 V reverse voltage rating. These parts are suitable for applications requiring higher current capacity than the original 15 A specification. DSB60C45PB offers superior forward voltage characteristics at 630 mV @ 30 A.

Superior Performance Option: The MBR3045CTE3/TU manufactured by Microchip Technology matches all electrical specifications of the MBR3045CT-E1 while providing extended operating temperature range to 175°C and significantly lower reverse leakage current of 50 µA @ 45 V. This part is in active production with RoHS3 compliance.

Lower Forward Voltage Alternative: The STPS30L45CT manufactured by STMicroelectronics provides the lowest forward voltage drop at 550 mV @ 15 A, reducing power dissipation in applications with continuous current flow. This part maintains 45 V reverse voltage and 15 A current ratings with active production status and RoHS3 compliance.

All recommended substitutes maintain TO-220-3 through-hole packaging, Schottky technology, 1 pair common cathode configuration, and fast recovery characteristics ≤ 500 ns. Selection should be based on specific application requirements for forward voltage drop, reverse leakage current, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the MBR3045CT-BP be used as a direct replacement for the MBR3045CT-E1?

A: Yes. The MBR3045CT-BP is a parametric equivalent with identical 45 V reverse voltage, 15 A current rating, and 700 mV forward voltage drop @ 15 A. Both parts use TO-220-3 through-hole packaging and Schottky technology with 1 pair common cathode configuration. The MBR3045CT-BP is in active production status.

Q: What is the difference between the DSA30C45PB and DSB60C45PB?

A: Both parts provide 30 A current capability at 45 V reverse voltage in TO-220-3 packaging. The primary difference is forward voltage drop: DSA30C45PB is rated at 750 mV @ 30 A, while DSB60C45PB is rated at 630 mV @ 30 A. DSB60C45PB offers lower power dissipation. DSB60C45PB has higher reverse leakage current at 10 mA @ 45 V compared to DSA30C45PB at 300 µA @ 45 V.

Q: Can I use a 30 A rated part (DSA60C45PB or DSB60C45PB) in place of the 15 A rated MBR3045CT-E1?

A: Yes, from an electrical standpoint. The 30 A rated parts maintain the same 45 V reverse voltage and TO-220-3 packaging. However, the higher current rating does not provide functional advantage in circuits designed for 15 A operation. Selection should be based on actual circuit current requirements.

Q: What is the significance of the operating temperature range difference between parts?

A: The MBR3045CT-E1 operates from -65°C to 150°C. Several substitutes extend the maximum operating temperature to 175°C (DSA30C45PB, DSSK28-0045A, MBR3045CTE3/TU). This extended range provides additional thermal margin in high-temperature applications. The minimum operating temperature of -55°C for most substitutes is acceptable for most industrial applications.

Q: Why does the STPS30L45CT have lower forward voltage than the original part?

A: The STPS30L45CT is rated at 550 mV @ 15 A compared to 700 mV @ 15 A for the MBR3045CT-E1. This represents improved Schottky diode technology with lower forward voltage drop, resulting in reduced power dissipation and heat generation during operation. This is a performance advantage in applications with continuous current flow.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant. The MBR3045CT-E1 is also RoHS3 compliant. Compliance status is maintained across all recommended substitutes.

Q: What does "1 Pair Common Cathode" configuration mean?

A: This configuration contains two diodes with a shared cathode terminal. The common cathode connection is brought out as a single pin, while the two anodes are brought out as separate pins. This three-pin arrangement is standard for TO-220-3 packaging. All substitute parts maintain this identical configuration.

Q: Can I substitute parts with different reverse leakage current ratings?

A: Yes, within the allowable range. The MBR3045CT-E1 is rated at 100 µA @ 45 V. Substitutes with lower reverse leakage (such as MBR3045CTE3/TU at 50 µA) provide improved performance. Substitutes with higher reverse leakage (such as DSA30C45PB at 300 µA) are acceptable for most applications but may increase standby power consumption in high-impedance circuits.

Q: What is the difference between TO-220-3 and TO-220AB packaging designations?

A: Both designations refer to the same three-pin through-hole package format. TO-220-3 and TO-220AB are equivalent package types used by different manufacturers. All parts listed maintain mechanical and electrical compatibility in TO-220-3 through-hole applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message