MBRF2045CT-LJ Equivalent & Substitute Parts

Part Overview

The MBRF2045CT-LJ is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with 45 V reverse voltage rating and 10 A average rectified current per diode. The device is packaged in TO-220-3 Full Pack with isolated tab (ITO-220AB) for through-hole mounting applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part carries automotive grade qualification (AEC-Q101) and is ROHS3 compliant.

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	640 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (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
Supplier Device Package	ITO-220AB
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBRF2045CT-LJ is determined by the following critical parameters: diode configuration (1 pair common cathode), technology (Schottky), reverse voltage rating (45 V minimum), average rectified current per diode (10 A minimum), mounting type (through hole), and package type (TO-220-3 Full Pack with isolated tab, ITO-220AB).

Substitute parts are grouped into three categories based on current rating and voltage rating variations:

Category 1: Direct Electrical Equivalents (45 V, 10 A) Parts maintaining identical voltage and current specifications with the same package configuration.

Category 2: Higher Current Rating (45 V, 15 A or 20 A) Parts with increased current capacity at the same 45 V voltage rating, suitable for applications requiring higher current handling.

Category 3: Higher Voltage Rating (50 V, 10 A or 20 A) Parts with increased voltage rating at equivalent or higher current ratings, suitable for applications requiring higher reverse voltage margin.

All substitute parts maintain Schottky technology, fast recovery speed characteristics, through-hole mounting, and ITO-220AB package configuration. Product status (active vs. obsolete) and manufacturer availability are secondary selection criteria.

Parameter Comparison

Parameter	MBRF2045CT-LJ	MBR2045CTF-G1	DSTF2045C	DSTF2050C	DSTF3045C	DSTF4045C	DSTF4050C	VFT3045C-M3/4W
Manufacturer	Diodes Inc.	Diodes Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Vishay
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	50 V	45 V	45 V	50 V	45 V
Current - Average Rectified (Io) (per Diode)	10 A	10 A	10 A	10 A	15 A	20 A	20 A	15 A
Voltage - Forward (Vf) (Max) @ If	640 mV @ 10 A	640 mV @ 10 A	580 mV @ 10 A	550 mV @ 10 A	570 mV @ 15 A	580 mV @ 20 A	600 mV @ 200 A	570 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	100 µA @ 45 V	2 mA @ 45 V	1.5 mA @ 50 V	2 mA @ 45 V	3 mA @ 45 V	1 mA @ 50 V	2 mA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab
Supplier Device Package	ITO-220AB	TO-220F-3	ITO-220AB	ITO-220AB	ITO-220AB	ITO-220AB	ITO-220AB	ITO-220AB
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Same Electrical and Mechanical Specifications)

MBR2045CTF-G1 (Diodes Incorporated) is a direct equivalent to MBRF2045CT-LJ with identical electrical specifications (45 V, 10 A) and the same ITO-220AB package configuration. Both parts are obsolete; however, MBR2045CTF-G1 maintains the same base product number (MBR2045) and is available in inventory. This part is suitable for direct replacement in existing designs without modification.

Active Substitute with Identical Electrical Specifications

DSTF2045C (Littelfuse Inc.) provides an active product alternative with matching 45 V reverse voltage and 10 A current rating in the ITO-220AB package. This part is currently in active production status, ensuring long-term availability and supply chain continuity. Forward voltage is improved (580 mV vs. 640 mV at 10 A), and reverse leakage is reduced (2 mA vs. 100 µA at 45 V). ROHS3 compliance and ITO-220AB package configuration are maintained.

Higher Current Rating Alternatives (45 V)

DSTF3045C (Littelfuse Inc., 15 A) and DSTF4045C (Littelfuse Inc., 20 A) are suitable for applications requiring increased current capacity at the same 45 V voltage rating. Both parts maintain active product status, ITO-220AB package configuration, and ROHS3 compliance. These parts are backward compatible in applications where the original 10 A rating provides design margin.

VFT3045C-M3/4W (Vishay, 15 A) offers equivalent current capacity to DSTF3045C with identical electrical specifications and ITO-220AB package. This part is part of the TMBS® series and maintains active product status with ROHS3 compliance.

Higher Voltage Rating Alternatives

DSTF2050C (Littelfuse Inc., 50 V, 10 A) and DSTF4050C (Littelfuse Inc., 50 V, 20 A) provide increased reverse voltage margin at equivalent or higher current ratings. These parts are suitable for applications requiring higher voltage headroom while maintaining the same current capacity or exceeding it. Both parts are active products in ITO-220AB package with ROHS3 compliance.

All substitute parts maintain Schottky technology, fast recovery speed characteristics, through-hole mounting, and automotive-grade qualification where applicable. Selection should be based on specific application requirements for voltage margin, current capacity, and long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can MBR2045CTF-G1 be used as a direct replacement for MBRF2045CT-LJ?

A: Yes. MBR2045CTF-G1 is a direct equivalent with identical electrical specifications (45 V, 10 A) and the same ITO-220AB package configuration. The primary difference is the supplier device package designation (TO-220F-3 vs. ITO-220AB), which reflects packaging variation within the same TO-220-3 Full Pack form factor. Both parts are obsolete; however, MBR2045CTF-G1 is available in inventory.

Q: What is the difference between DSTF2045C and MBRF2045CT-LJ?

A: DSTF2045C is an active product substitute with identical electrical ratings (45 V, 10 A) and package configuration (ITO-220AB). Key differences include improved forward voltage (580 mV vs. 640 mV at 10 A), reduced reverse leakage (2 mA vs. 100 µA at 45 V), and active production status. Both parts are ROHS3 compliant and suitable for direct substitution.

Q: When should I use DSTF3045C or DSTF4045C instead of DSTF2045C?

A: DSTF3045C (15 A) and DSTF4045C (20 A) are selected when the application requires higher current capacity than the original 10 A rating. These parts maintain the same 45 V reverse voltage rating and ITO-220AB package configuration. Selection depends on the actual current requirements of the circuit; higher-rated parts are backward compatible in applications where the original 10 A rating provides design margin.

Q: What is the advantage of DSTF2050C or DSTF4050C?

A: DSTF2050C (50 V, 10 A) and DSTF4050C (50 V, 20 A) provide increased reverse voltage rating compared to the original 45 V specification. These parts are selected for applications requiring higher voltage headroom or operating in environments with higher transient voltage conditions. Both parts maintain the ITO-220AB package and active product status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (MBR2045CTF-G1, DSTF2045C, DSTF2050C, DSTF3045C, DSTF4045C, DSTF4050C, and VFT3045C-M3/4W) are ROHS3 compliant, matching the compliance status of the original MBRF2045CT-LJ.

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

A: Both designations refer to TO-220-3 Full Pack configurations with isolated tab. ITO-220AB is the standard isolated tab variant used by Littelfuse and Vishay. TO-220F-3 is the Diodes Incorporated designation for the same form factor. These packages are mechanically and electrically compatible for through-hole mounting applications.

Q: Can VFT3045C-M3/4W be used instead of DSTF3045C?

A: Yes. VFT3045C-M3/4W is a suitable alternative to DSTF3045C with identical electrical specifications (45 V, 15 A) and the same ITO-220AB package configuration. Both parts are active products with ROHS3 compliance. VFT3045C-M3/4W is part of the Vishay TMBS® series and offers equivalent performance.

Q: What is the operating temperature range difference between VFT3045C-M3/4W and other substitutes?

A: VFT3045C-M3/4W has a minimum operating temperature of -40°C, compared to -55°C for MBRF2045CT-LJ and other Littelfuse substitutes. This difference is relevant only for applications requiring operation below -40°C. For standard industrial and automotive applications operating above -40°C, this difference is not a limiting factor.

Q: Are all substitute parts suitable for automotive applications?

A: MBRF2045CT-LJ carries automotive grade qualification (AEC-Q101). Littelfuse DSTF series parts (DSTF2045C, DSTF2050C, DSTF3045C, DSTF4045C, DSTF4050C) are active products with automotive-grade specifications. VFT3045C-M3/4W is part of the Vishay TMBS® series with automotive-grade qualification. All substitute parts are suitable for automotive applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message