MBRF1045CT Equivalent & Substitute Parts

Part Overview

The MBRF1045CT is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 10 A average rectified current per diode. The component features fast recovery characteristics (≤500 ns) and is housed in a TO-220-3 Full Pack with isolated tab package. The MBRF1045CT is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

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)	10 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 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-220-3 Full Pack, Isolated Tab
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBRF1045CT 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-220-3 Full Pack, Isolated Tab

Allowable Variation Parameters:

Current - Average Rectified (Io): Substitutes rated at 10 A or higher are acceptable
Voltage - Forward (Vf): Substitutes with equal or lower forward voltage are acceptable
Current - Reverse Leakage: Substitutes with equal or lower leakage current are acceptable
Operating Temperature Range: Substitutes with equal or wider temperature range are acceptable
Product Status: Active products are preferred over discontinued components

Substitute parts are grouped into two categories: Parametric Equivalents (matching all critical parameters with identical current rating) and Similar Parts (matching all critical parameters with higher current ratings or improved specifications).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Io (A)	Vf (Max) @ If	Ir @ 45V	Tj (°C)	Product Status	Grade
MBRF1045CT	Taiwan Semiconductor Corporation	10	800 mV @ 10 A	100 µA	-55 ~ 150	Discontinued at DiGi Electronics	Standard
MBRF1045CTHC0G	Taiwan Semiconductor Corporation	10	800 mV @ 10 A	100 µA	-55 ~ 150	Active	Automotive (AEC-Q101)
MBRF1045CTP	SMC Diode Solutions	10	700 mV @ 5 A	1 mA	-55 ~ 150	Active	Standard
MBRF1545CT-E3/45	Vishay General Semiconductor - Diodes Division	7.5	570 mV @ 7.5 A	100 µA	-65 ~ 150	Active	Standard
MBRF1545CTHE3/45	Vishay General Semiconductor - Diodes Division	7.5	570 mV @ 7.5 A	100 µA	-65 ~ 150	Active	Automotive (AEC-Q101)
MBRF2045CT-E3/45	Vishay General Semiconductor - Diodes Division	10	650 mV @ 10 A	100 µA	-65 ~ 150	Active	Standard
MBRF2045CTHE3/45	Vishay General Semiconductor - Diodes Division	10	650 mV @ 10 A	100 µA	-65 ~ 150	Active	Automotive (AEC-Q101)
MBRF2545CT-E3/45	Vishay General Semiconductor - Diodes Division	12.5	820 mV @ 30 A	200 µA	-65 ~ 150	Active	Standard
MBRF2545CT/45	Vishay General Semiconductor - Diodes Division	12.5	Not specified	200 µA	-65 ~ 150	Active	Standard
MBRF30H45CT-E3/45	Vishay General Semiconductor - Diodes Division	15	620 mV @ 15 A	80 µA	-65 ~ 175	Active	Standard

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

MBRF1045CTHC0G is the primary parametric equivalent to MBRF1045CT. This component matches all electrical specifications and package requirements. The MBRF1045CTHC0G is currently active and carries automotive-grade qualification (AEC-Q101), providing enhanced reliability documentation. Selection of MBRF1045CTHC0G is appropriate for applications requiring identical performance characteristics with active product status.

Direct Manufacturer Alternative:

MBRF1045CTP, manufactured by SMC Diode Solutions, provides an active alternative with identical current rating and package configuration. This component exhibits lower forward voltage (700 mV @ 5 A) and higher reverse leakage current (1 mA @ 45 V) compared to the original specification. MBRF1045CTP is suitable for applications where lower forward voltage drop is beneficial and higher leakage current is acceptable.

Similar Current Rating Substitutes:

MBRF2045CT-E3/45 and MBRF2045CTHE3/45 (Vishay) are active alternatives rated for 10 A, matching the original current specification. These components feature lower forward voltage (650 mV @ 10 A) and extended operating temperature range (-65°C to 150°C). The MBRF2045CTHE3/45 variant includes automotive-grade qualification (AEC-Q101). These substitutes are suitable for applications where improved thermal performance or automotive compliance is required.

Higher Current Rating Substitutes:

MBRF1545CT-E3/45 and MBRF1545CTHE3/45 (Vishay) are rated for 7.5 A and provide lower forward voltage (570 mV @ 7.5 A). The MBRF1545CTHE3/45 includes automotive-grade qualification. These components are suitable for applications where current requirements are 7.5 A or lower.

MBRF2545CT-E3/45 and MBRF2545CT/45 (Vishay) are rated for 12.5 A, providing higher current capacity. MBRF30H45CT-E3/45 (Vishay) is rated for 15 A with extended temperature range (-65°C to 175°C) and lower reverse leakage (80 µA @ 45 V). These higher-rated components are suitable for applications requiring increased current handling capability.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the original MBRF1045CT. Automotive-grade variants (MBRF1045CTHC0G, MBRF1545CTHE3/45, MBRF2045CTHE3/45) carry AEC-Q101 qualification for applications requiring automotive reliability standards.

Frequently Asked Questions (FAQ)

Q: Can MBRF1045CTHC0G be used as a direct replacement for MBRF1045CT?

A: Yes. MBRF1045CTHC0G is a parametric equivalent with identical electrical specifications (45 V, 10 A, 800 mV forward voltage @ 10 A, 100 µA reverse leakage @ 45 V) and package configuration (TO-220-3 Full Pack, Isolated Tab). The primary difference is product status (active versus discontinued) and automotive-grade qualification (AEC-Q101).

Q: What is the difference between MBRF2045CT-E3/45 and MBRF2045CTHE3/45?

A: Both components are rated for 45 V and 10 A with identical forward voltage (650 mV @ 10 A) and reverse leakage (100 µA @ 45 V). The MBRF2045CTHE3/45 includes automotive-grade qualification (AEC-Q101), while MBRF2045CT-E3/45 is standard grade. Both are manufactured by Vishay and are currently active.

Q: Can MBRF1545CT-E3/45 substitute for MBRF1045CT in all applications?

A: MBRF1545CT-E3/45 is rated for 7.5 A, which is lower than the original 10 A specification. This component is suitable only for applications where the actual current requirement does not exceed 7.5 A. The 45 V reverse voltage rating, Schottky technology, and TO-220-3 package are identical.

Q: What are the advantages of MBRF30H45CT-E3/45 over MBRF1045CT?

A: MBRF30H45CT-E3/45 provides higher current capacity (15 A versus 10 A), lower reverse leakage (80 µA versus 100 µA @ 45 V), lower forward voltage (620 mV @ 15 A), and extended operating temperature range (-65°C to 175°C versus -55°C to 150°C). This component is suitable for applications requiring higher current handling or wider temperature operation.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitutes maintain ROHS3 compliance, consistent with the original MBRF1045CT. MBRF2545CT/45 is noted as RoHS non-compliant and should be avoided in applications requiring RoHS compliance.

Q: What is the significance of the "Isolated Tab" designation in the package specification?

A: The isolated tab in the TO-220-3 Full Pack indicates that the tab is electrically isolated from the diode array, allowing independent thermal management without electrical connection to the circuit. This is critical for proper heat dissipation in high-current applications.

Q: Can MBRF1045CTP be used interchangeably with MBRF1045CT?

A: MBRF1045CTP is an active alternative with identical 10 A current rating and TO-220-3 package. However, it exhibits different electrical characteristics: lower forward voltage (700 mV @ 5 A) and significantly higher reverse leakage (1 mA @ 45 V). Substitution is acceptable only if the application tolerates higher leakage current.

Q: Which substitute offers the best thermal performance?

A: MBRF30H45CT-E3/45 offers the best thermal performance characteristics with the lowest forward voltage (620 mV @ 15 A) and extended operating temperature range (-65°C to 175°C). This component is suitable for applications requiring minimal heat generation and operation in extreme temperature environments.

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