MBR2545CTH Equivalent & Substitute Parts

Part Overview

The MBR2545CTH is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as 1 pair common cathode with 45 V reverse voltage rating and 25 A average rectified current per diode. The device is packaged in TO-220-3 through-hole format and qualified to AEC-Q101 automotive standards. This part is discontinued at DiGi Electronics, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility for existing applications.

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)	25 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 25 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBR2545CTH is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Diode Configuration: 1 Pair Common Cathode (pinout compatibility)
Technology: Schottky (switching characteristics and forward voltage behavior)
Voltage - DC Reverse (Vr) (Max): 45 V (minimum voltage rating requirement)
Mounting Type: Through Hole (mechanical installation compatibility)
Package / Case: TO-220-3 (physical form factor)

Current Rating Consideration: The MBR2545CTH operates at 25 A average rectified current per diode. Substitute parts are grouped by their current ratings relative to this specification. Parts with equal or higher current ratings provide direct substitution capability. Parts with lower current ratings are listed for reference but represent downrated alternatives suitable only for reduced-current applications.

Secondary Parameters: Forward voltage (Vf), reverse leakage current, and operating temperature range are provided for comparative analysis but do not restrict substitution eligibility when primary parameters are met.

Parameter Comparison

Part Number	Manufacturer	Io (per Diode)	Vr (Max)	Vf (Max) @ If	Reverse Leakage @ Vr	Operating Temp (Junction)	Package	Product Status
MBR2545CTH	Taiwan Semiconductor Corporation	25 A	45 V	850 mV @ 25 A	200 µA @ 45 V	-55°C ~ 150°C	TO-220-3	Discontinued
MBR1545CT-E3/45	Vishay General Semiconductor - Diodes Division	7.5 A	45 V	570 mV @ 7.5 A	100 µA @ 45 V	-65°C ~ 175°C	TO-220-3	Active
MBR2045CT-LJ-01	Diodes Incorporated	10 A	45 V	640 mV @ 10 A	100 µA @ 45 V	-55°C ~ 150°C	TO-220-3	Active
MBR2545CT-E3/45	Vishay General Semiconductor - Diodes Division	15 A	45 V	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 150°C	TO-220-3	Active
MBR3045CT-BP	Micro Commercial Co	15 A	45 V	700 mV @ 15 A	200 µA @ 45 V	-55°C ~ 150°C	TO-220-3	Active
MBR3045CTE3/TU	Microchip Technology	15 A	45 V	700 mV @ 15 A	50 µA @ 45 V	-65°C ~ 175°C	TO-220-3	Active
MBR3045FCTE3/TU	Microchip Technology	15 A	45 V	700 mV @ 15 A	50 µA @ 45 V	-65°C ~ 175°C	TO-220-3	Active
VT1045C-M3/4W	Vishay General Semiconductor - Diodes Division	5 A	45 V	580 mV @ 5 A	500 µA @ 45 V	-40°C ~ 150°C	TO-220-3	Active
VT1045CBP-M3/4W	Vishay General Semiconductor - Diodes Division	5 A	45 V	580 mV @ 5 A	500 µA @ 45 V	-40°C ~ 200°C (Max)	TO-220-3	Active
VT2045C-M3/4W	Vishay General Semiconductor - Diodes Division	10 A	45 V	580 mV @ 10 A	2 mA @ 45 V	-40°C ~ 150°C	TO-220-3	Active
VT2060G-M3/4W	Vishay General Semiconductor - Diodes Division	10 A	45 V	580 mV @ 10 A	2 mA @ 45 V	-40°C ~ 150°C	TO-220-3	Active

Engineering Selection Recommendations

Direct Substitution Candidates (15 A Rating):

The following parts satisfy all critical matching parameters and maintain the same diode configuration, reverse voltage rating, and through-hole TO-220-3 package format:

MBR2545CT-E3/45 (Vishay): Active product status with 15 A current rating. Operates within -65°C to 150°C junction temperature range. ROHS3 compliant. Suitable for applications where the full 25 A rating of the original part is not required.
MBR3045CT-BP (Micro Commercial Co): Active product status with 15 A current rating. Maintains -55°C to 150°C operating range matching the original specification. ROHS3 compliant. Supplier device package TO-220AB provides mechanical compatibility.
MBR3045CTE3/TU (Microchip Technology): Active product status with 15 A current rating. Extended operating range of -65°C to 175°C. ROHS3 compliant. Lower reverse leakage current (50 µA) compared to original specification.
MBR3045FCTE3/TU (Microchip Technology): Active product status with 15 A current rating. Extended operating range of -65°C to 175°C. ROHS3 compliant. Identical electrical characteristics to MBR3045CTE3/TU.

Reduced-Current Alternatives (10 A Rating):

MBR2045CT-LJ-01 (Diodes Incorporated): Active product status with AEC-Q101 automotive qualification matching the original part. 10 A current rating represents 40% reduction from original specification. Suitable for applications with lower current requirements.
VT2045C-M3/4W (Vishay): Active product status with AEC-Q101 automotive qualification. 10 A current rating. Extended reverse leakage specification (2 mA) compared to original.
VT2060G-M3/4W (Vishay): Active product status with AEC-Q101 automotive qualification. 10 A current rating. Identical electrical characteristics to VT2045C-M3/4W.

Lower-Current Alternatives (5 A Rating):

VT1045C-M3/4W (Vishay): Active product status. 5 A current rating represents 80% reduction from original specification. Suitable only for significantly reduced-current applications.
VT1045CBP-M3/4W (Vishay): Active product status with TMBS® series designation. 5 A current rating. Extended maximum junction temperature specification (200°C Max). Suitable only for significantly reduced-current applications.

Reduced-Current Alternative (7.5 A Rating):

MBR1545CT-E3/45 (Vishay): Active product status. 7.5 A current rating represents 70% reduction from original specification. Extended operating range of -65°C to 175°C. Suitable for applications with moderately reduced current requirements.

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original MBR2545CTH specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower current rating than the MBR2545CTH?

A: Substitution with lower current-rated parts is permissible only if the application circuit operates at or below the substitute part's current specification. The MBR2545CTH is rated for 25 A average rectified current per diode. Parts rated at 15 A, 10 A, 7.5 A, or 5 A can be used in applications where actual circuit current does not exceed the substitute part's rating. Using a lower-rated part in a circuit designed for the full 25 A specification will result in device failure.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All listed substitute parts use the TO-220-3 through-hole package format, which provides mechanical and electrical pin compatibility. Supplier device packages are designated as either TO-220-3 or TO-220AB, both of which are physically and functionally equivalent for through-hole mounting applications. PCB footprints designed for TO-220-3 packages accommodate all listed substitutes without modification.

Q: What is the significance of the 1 Pair Common Cathode configuration?

A: The 1 Pair Common Cathode configuration defines the internal diode arrangement and pin connectivity. All listed substitute parts maintain this identical configuration, ensuring that circuit connections and signal routing remain unchanged. This configuration is essential for proper circuit operation and cannot be altered through substitution.

Q: Do all substitute parts meet automotive qualification requirements?

A: The original MBR2545CTH carries AEC-Q101 automotive qualification. Among the substitute parts, MBR2045CT-LJ-01, VT2045C-M3/4W, and VT2060G-M3/4W explicitly carry AEC-Q101 qualification. Other substitute parts are ROHS3 compliant and suitable for general industrial applications but do not carry explicit automotive qualification designations. Selection should consider whether AEC-Q101 qualification is a requirement for the target application.

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

A: Both TO-220-3 and TO-220AB refer to the same three-pin through-hole package format with identical pin spacing, lead configuration, and mounting requirements. The designations reflect different supplier nomenclature conventions but represent functionally equivalent packages. Parts specified as either TO-220-3 or TO-220AB are mechanically and electrically interchangeable.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) varies among substitute parts, ranging from 570 mV to 850 mV depending on the specific part and current rating. Forward voltage directly affects power dissipation and voltage drop across the diode during conduction. In rectifier applications, higher forward voltage results in greater power loss and heat generation. Circuit design must account for the specific forward voltage of the selected substitute part to ensure proper voltage regulation and thermal management.

Q: Can I substitute a part with a higher reverse voltage rating?

A: Substitution with parts rated at higher reverse voltages is permissible from an electrical standpoint, as the higher rating provides additional safety margin. However, no substitute parts with reverse voltage ratings exceeding 45 V are listed in this reference. All listed substitutes maintain the 45 V reverse voltage specification of the original MBR2545CTH.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates that the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. All listed substitute parts carry ROHS3 compliance designation, ensuring environmental and regulatory compatibility with the original MBR2545CTH specification.

Q: Are there inventory considerations when selecting a substitute?

A: Inventory availability varies among substitute parts. The original MBR2545CTH is discontinued at DiGi Electronics. Among active substitutes, VT2045C-M3/4W shows the highest inventory level (8438 pcs), while MBR3045FCTE3/TU shows lower availability (684 pcs). Inventory status should be verified with current suppliers before final part selection to ensure procurement feasibility.

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