MBRF2045CT Equivalent & Substitute Parts

Part Overview

The MBRF2045CT is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode with 60 V reverse voltage rating and 10 A average rectified current per diode. The component is housed in a TO-220-3 Full Pack with isolated tab for through-hole mounting and is qualified to AEC-Q101 automotive standards.

The MBRF2045CT is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Substitute components must maintain functional compatibility within the electrical and mechanical constraints of the original application.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	60	V
Current - Average Rectified (Io) (per Diode)	10	A
Voltage - Forward (Vf) (Max) @ If	640 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100 µA @ 60 V	—
Operating Temperature - Junction	−55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Full Pack, Isolated Tab	—
Supplier Device Package	ITO-220AB	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MBRF2045CT is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Mounting Type: Through Hole
Package / Case: TO-220-3 Full Pack, Isolated Tab
Supplier Device Package: ITO-220AB

Electrical Performance Parameters:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 60 V
Current - Average Rectified (Io) (per Diode): Must equal or exceed 10 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: Must encompass −55°C to 150°C range

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (Vr ≥ 60 V, Io ≥ 10 A): These parts maintain or exceed the original voltage and current ratings and are suitable for direct replacement without circuit modification.

Category B - Reduced Voltage Substitutes (Vr < 60 V, Io ≥ 10 A): These parts operate at lower reverse voltage ratings (45 V or 50 V) and are suitable only for applications where the circuit design voltage does not exceed the substitute part's maximum rating. These substitutes are not interchangeable in all applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA/mA]	Tj (°C)	Status
MBRF2045CT	Diodes Incorporated	60	10	640 @ 10 A	100 µA @ 60 V	−55 to 150	Obsolete
MBRF2045CTP	SMC Diode Solutions	45	—	840 @ 20 A	1 mA @ 45 V	−55 to 150	Active
MBRF2045CTU	SMC Diode Solutions	45	—	500 @ 10 A	1 mA @ 45 V	−55 to 125	Active
SBRF2045CT	SMC Diode Solutions	45	—	750 @ 10 A	1 mA @ 45 V	−55 to 150	Active
DSTF2045C	Littelfuse Inc.	45	10	580 @ 10 A	2 mA @ 45 V	−55 to 150	Active
DSTF2050C	Littelfuse Inc.	50	10	550 @ 10 A	1.5 mA @ 50 V	−55 to 150	Active
DSTF3045C	Littelfuse Inc.	45	15	570 @ 15 A	2 mA @ 45 V	−55 to 150	Active
DSTF4045C	Littelfuse Inc.	45	20	580 @ 20 A	3 mA @ 45 V	−55 to 150	Active
DSTF4050C	Littelfuse Inc.	50	20	600 @ 200 A	1 mA @ 50 V	−55 to 150	Active
MBR1040FCT-BP	Micro Commercial Co	40	10	—	100 µA @ 40 V	−50 to 150	Active

Engineering Selection Recommendations

Primary Substitute (Manufacturer Recommended):

DSTF2045C (Littelfuse Inc.) is the manufacturer-recommended substitute. This part maintains the 1 Pair Common Cathode configuration, Schottky technology, 10 A current rating, and TO-220-3 Full Pack isolated tab package. The DSTF2045C operates at 45 V maximum reverse voltage with active product status and AEC-Q101 qualification equivalent performance. Forward voltage is 580 mV at 10 A, which is lower than the original 640 mV specification, providing improved thermal performance.

Secondary Substitutes (Voltage-Reduced Applications):

DSTF2050C (Littelfuse Inc.) is suitable for applications where circuit design voltage does not exceed 50 V. This part provides 10 A current capacity with improved forward voltage characteristics (550 mV @ 10 A) and active product status.

MBRF2045CTU (SMC Diode Solutions) is suitable for applications where circuit design voltage does not exceed 45 V and operating junction temperature does not exceed 125°C. This part provides the lowest forward voltage (500 mV @ 10 A) among available substitutes.

Higher Current Capacity Alternatives:

DSTF3045C (Littelfuse Inc.) and DSTF4045C (Littelfuse Inc.) provide increased current capacity (15 A and 20 A respectively) at 45 V reverse voltage rating. These parts are suitable for applications requiring higher current handling with reduced voltage requirements.

Not Recommended:

MBR1040FCT-BP (Micro Commercial Co) operates at 40 V maximum reverse voltage, which is below the original 60 V specification. This part is suitable only for applications with significantly reduced voltage requirements and is not a general-purpose substitute.

SBRF2045CT (SMC Diode Solutions) and MBRF2045CTP (SMC Diode Solutions) lack specified average rectified current ratings in the provided data, limiting their suitability for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can DSTF2045C be used as a direct replacement for MBRF2045CT in all applications?

A: DSTF2045C is suitable for applications where the circuit design voltage does not exceed 45 V. The original MBRF2045CT is rated for 60 V reverse voltage. If the application requires 60 V reverse voltage capability, DSTF2045C is not suitable. For applications operating at 45 V or below, DSTF2045C provides equivalent functionality with improved forward voltage characteristics.

Q: What is the difference between DSTF2045C and DSTF2050C?

A: Both parts maintain 10 A current capacity and Schottky technology in TO-220-3 Full Pack isolated tab packages. DSTF2050C operates at 50 V maximum reverse voltage compared to DSTF2045C at 45 V. DSTF2050C provides forward voltage of 550 mV at 10 A versus 580 mV for DSTF2045C. Selection depends on circuit design voltage requirements.

Q: Are all substitute parts AEC-Q101 qualified?

A: The provided data confirms AEC-Q101 qualification for the original MBRF2045CT. Qualification status for substitute parts is not explicitly stated in the provided parameters. Verification of automotive qualification requirements should be confirmed with the component manufacturer or supplier for specific applications.

Q: Can DSTF3045C or DSTF4045C be used instead of DSTF2045C?

A: DSTF3045C and DSTF4045C provide higher current capacity (15 A and 20 A respectively) at the same 45 V reverse voltage rating. These parts are electrically compatible and can be used in applications where the original 10 A rating is insufficient. However, they are not necessary for applications requiring only 10 A capacity.

Q: What is the significance of the isolated tab in the TO-220-3 Full Pack package?

A: The isolated tab indicates that the mounting tab is electrically isolated from the diode circuit. This allows the component to be mounted directly to a heat sink without requiring an insulating washer, simplifying thermal management in high-current applications. All substitute parts maintain this isolated tab configuration.

Q: Why does MBR1040FCT-BP have a lower reverse voltage rating than the original part?

A: MBR1040FCT-BP is rated for 40 V maximum reverse voltage, which is 20 V below the original MBRF2045CT specification. This part is suitable only for applications where the circuit design voltage does not exceed 40 V. It is not a general-purpose substitute for the original part.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage differences directly affect power dissipation and thermal performance. Lower forward voltage (such as MBRF2045CTU at 500 mV @ 10 A) results in reduced power loss and lower junction temperature. Higher forward voltage (such as MBRF2045CTP at 840 mV @ 20 A) results in increased power dissipation. Selection should consider thermal design requirements of the application.

Q: Are all substitute parts RoHS3 compliant?

A: The provided data confirms RoHS3 compliance for the original MBRF2045CT and all listed substitute parts. All parts meet RoHS3 environmental compliance requirements.

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