MBR2045CT Equivalent & Substitute Parts

Part Overview

The MBR2045CT is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as 1 pair common cathode with 45 V DC reverse voltage rating and 10 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and features fast recovery characteristics suitable for rectification applications.

The MBR2045CT is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component specification.

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)	10	A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (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	—

Substitute Part Grouping Explanation

Substitution of the MBR2045CT is determined by the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 pair common cathode
Technology: Schottky or Super Barrier rectifier
Voltage rating: 45 V DC reverse (Vr) minimum
Current rating: 10 A average rectified (Io) per diode minimum
Package: TO-220-3 through-hole mounting
Speed: Fast recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current
Reverse leakage current (Ir) at rated voltage
Operating temperature range
RoHS and REACH compliance status

Substitute parts are grouped into two categories:

Direct Equivalents: Parts meeting all primary substitution criteria with identical or superior electrical performance within the specified parameters.

Functional Alternatives: Parts with modified current or voltage ratings that remain compatible within the application's design envelope, provided the electrical characteristics do not degrade system performance.

Parameter Comparison

Part Number	Manufacturer	Diode Config	Technology	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Operating)	Package	Product Status
MBR2045CT	Vishay	1 Pair Common Cathode	Schottky	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	-65 to 150°C	TO-220-3	Obsolete
MBR2045CTP	Diodes Incorporated	1 Pair Common Cathode	Schottky	45 V	10 A	650 mV @ 10 A	100 µA @ 45 V	-55 to 150°C	TO-220-3 Isolated Tab	Obsolete
MBR2045CTU	SMC Diode Solutions	1 Pair Common Cathode	Schottky	45 V	Not Specified	810 mV @ 20 A	1 mA @ 45 V	-55 to 150°C	TO-220-3	Active
SBR2045CT	Diodes Incorporated	1 Pair Common Cathode	Super Barrier	45 V	10 A	540 mV @ 10 A	500 µA @ 45 V	-65 to 150°C	TO-220-3	Active
MBR2040CT	Diodes Incorporated	1 Pair Common Cathode	Schottky	40 V	20 A	840 mV @ 20 A	100 µA @ 40 V	-55 to 150°C	TO-220-3	Active
MBR2045CT-BP	Micro Commercial Co	1 Pair Common Cathode	Schottky	45 V	20 A	Not Specified	100 µA @ 45 V	-55 to 150°C	TO-220-3	Active
STPS2045CT	STMicroelectronics	1 Pair Common Cathode	Schottky	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	-55 to 175°C	TO-220-3	Active

Engineering Selection Recommendations

Direct Equivalent Selection:

The STPS2045CT manufactured by STMicroelectronics provides the closest electrical equivalence to the MBR2045CT. Both devices share identical voltage rating (45 V), current rating (10 A per diode), forward voltage (570 mV @ 10 A), and reverse leakage (100 µA @ 45 V). The STPS2045CT is classified as active product status, ensuring ongoing availability and supply chain support. The device is RoHS3 compliant and REACH unaffected.

The SBR2045CT manufactured by Diodes Incorporated offers an alternative with Super Barrier technology. This device maintains the 45 V voltage rating and 10 A current rating with superior forward voltage performance (540 mV @ 10 A). The SBR2045CT is active product status, RoHS3 compliant, and supports the full operating temperature range of the original part (-65 to 150°C). Higher reverse leakage (500 µA @ 45 V) must be evaluated against application requirements.

Functional Alternative Selection:

The MBR2045CT-BP manufactured by Micro Commercial Co provides increased current capacity (20 A per diode) while maintaining the 45 V voltage rating and TO-220-3 package. This device is active product status and RoHS3 compliant, suitable for applications requiring higher current handling capability.

The MBR2040CT manufactured by Diodes Incorporated offers reduced voltage rating (40 V) with doubled current capacity (20 A per diode). This device is active product status and RoHS3 compliant. Selection requires confirmation that the 40 V rating meets application voltage requirements.

Compliance Considerations:

All recommended substitute parts are RoHS3 compliant, supporting modern manufacturing and environmental standards. The MBR2045CTP and MBR2045CTU are obsolete or have limited availability; these are not recommended for new designs despite electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SBR2045CT directly replace the MBR2045CT in all applications?

A: The SBR2045CT maintains electrical compatibility for voltage (45 V), current (10 A), and package (TO-220-3) specifications. The Super Barrier technology provides lower forward voltage (540 mV vs. 570 mV @ 10 A), which reduces power dissipation. However, reverse leakage current is higher (500 µA vs. 100 µA @ 45 V). Applications sensitive to reverse leakage must evaluate this parameter against design tolerances.

Q: What is the difference between the MBR2045CT and MBR2045CTP?

A: Both devices share identical voltage (45 V) and current (10 A) ratings with TO-220-3 packaging. The MBR2045CTP features an isolated tab variant (ITO-220S package) and is manufactured by Diodes Incorporated. Forward voltage is higher (650 mV vs. 570 mV @ 10 A). Both devices are classified as obsolete; the MBR2045CTP is not recommended for new designs.

Q: Is the MBR2040CT suitable as a substitute for the MBR2045CT?

A: The MBR2040CT provides increased current capacity (20 A vs. 10 A per diode) but reduced voltage rating (40 V vs. 45 V). This device is suitable only for applications where the maximum reverse voltage does not exceed 40 V. The TO-220-3 package and through-hole mounting are compatible. Forward voltage is higher (840 mV @ 20 A), resulting in increased power dissipation at rated current.

Q: What are the packaging differences among substitute parts?

A: Most substitute parts utilize standard TO-220-3 through-hole packaging. The MBR2045CTP features an isolated tab variant (ITO-220S), which provides electrical isolation between the mounting tab and the diode cathode. The MBR2045CT-BP is supplied in bulk packaging (TO-220AB), while other parts are supplied in tube packaging. All devices maintain through-hole mounting compatibility.

Q: Why is the STPS2045CT recommended as the primary substitute?

A: The STPS2045CT manufactured by STMicroelectronics provides complete electrical equivalence to the MBR2045CT across all critical parameters: 45 V voltage rating, 10 A current rating, 570 mV forward voltage @ 10 A, and 100 µA reverse leakage @ 45 V. The device is active product status, ensuring long-term availability. RoHS3 compliance and REACH unaffected status support modern manufacturing requirements.

Q: Can the MBR2045CT-BP be used in applications requiring the original 10 A rating?

A: Yes. The MBR2045CT-BP is rated for 20 A per diode, which exceeds the 10 A requirement of the original MBR2045CT. The device maintains the 45 V voltage rating and TO-220-3 package. Operating at 10 A provides thermal margin and extended component life. This device is active product status and RoHS3 compliant.

Q: What compliance certifications should be verified for substitute parts?

A: All recommended substitute parts are RoHS3 compliant. REACH status varies: STPS2045CT and SBR2045CT are REACH unaffected; MBR2045CTP and MBR2045CTU are REACH affected. Applications subject to REACH regulations must select parts with REACH unaffected status or conduct REACH compliance assessment for affected parts.

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