MBR1045CT Equivalent & Substitute Parts

Part Overview

The MBR1045CT is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode with a maximum reverse voltage of 45 V and average rectified current of 10 A per diode. The device is packaged in TO-220-3 through-hole configuration and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and active product support.

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	840 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MBR1045CT is determined by the following critical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io) (per Diode): 10 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-3 compatible

Secondary Compatibility Factors:

Operating Temperature Range: -55°C to 150°C minimum
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (10 A rated) Parts that match the 10 A current rating and all primary electrical specifications. These include MBR1045CTP, VS-MBR2045CTHN3, DSA20C45PB, DST2045C, and DSSK20-0045AM. These parts are suitable for direct replacement in applications requiring the specified 10 A performance.

Category 2: Higher Current Rated Alternatives (15 A and 30 A) Parts that exceed the 10 A specification, including DSA30C45PB (15 A) and DSB60C45PB (30 A). These provide enhanced current handling capability while maintaining the 45 V reverse voltage specification and are suitable for applications with higher current demands or design margin requirements.

Category 3: Single Diode Alternative (10 A, TO-220-2) The 10TQ045 is a single Schottky diode rated at 10 A, 45 V in TO-220-2 package. This part differs in configuration (single diode versus diode array) and package pinout, requiring circuit redesign for compatibility.

Parameter Comparison

Part Number	Manufacturer	Diode Config	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj Range [°C]	Package	Status
MBR1045CT	Diodes Incorporated	1 Pair Common Cathode	45	10	840 @ 10 A	100 @ 45 V	-55 to 150	TO-220-3	Obsolete
MBR1045CT	Taiwan Semiconductor Corporation	1 Pair Common Cathode	45	10	800 @ 10 A	100 @ 45 V	-55 to 150	TO-220-3	Discontinued at DiGi Electronics
MBR1045CTP	SMC Diode Solutions	1 Pair Common Cathode	45	—	700 @ 5 A	1000 @ 45 V	-55 to 150	TO-220-3	Active
SBR1045CT	SMC Diode Solutions	1 Pair Common Cathode	45	—	750 @ 5 A	1000 @ 45 V	-55 to 150	TO-220-3	Active
VS-MBR2045CTHN3	Vishay General Semiconductor - Diodes Division	1 Pair Common Cathode	45	10	840 @ 10 A	100 @ 45 V	-65 to 150	TO-220-3	Active
10TQ045	SMC Diode Solutions	Single Diode	45	10	570 @ 10 A	2000 @ 45 V	-55 to 175	TO-220-2	Active
DSA20C45PB	IXYS	1 Pair Common Cathode	45	10	750 @ 10 A	200 @ 45 V	-55 to 175	TO-220-3	Active
DSA30C45PB	IXYS	1 Pair Common Cathode	45	15	750 @ 15 A	300 @ 45 V	-55 to 175	TO-220-3	Active
DSB60C45PB	IXYS	1 Pair Common Cathode	45	30	630 @ 30 A	10000 @ 45 V	-55 to 150	TO-220-3	Active
DSSK20-0045AM	IXYS	1 Pair Common Cathode	45	10	690 @ 10 A	300 @ 45 V	-55 to 175	TO-220-3 Isolated Tab	Active
DST2045C	Littelfuse Inc.	1 Pair Common Cathode	45	10	580 @ 10 A	2000 @ 45 V	-55 to 150	TO-220-3	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

VS-MBR2045CTHN3 (Vishay General Semiconductor - Diodes Division) is the primary recommended substitute. This part maintains identical electrical specifications to the MBR1045CT, including 45 V reverse voltage, 10 A average rectified current per diode, 840 mV forward voltage at 10 A, and 100 µA reverse leakage at 45 V. The device is active in production, ROHS3 compliant, and offers an extended lower operating temperature limit (-65°C versus -55°C). Packaging is standard TO-220-3 through-hole configuration.

For Active Production with Acceptable Parameter Variations:

DSA20C45PB (IXYS) provides equivalent 10 A current rating and 45 V reverse voltage with slightly lower forward voltage (750 mV @ 10 A) and marginally higher reverse leakage (200 µA @ 45 V). This part is active in production and offers extended operating temperature range to 175°C. The TO-220-3 package is compatible with existing PCB layouts.

DST2045C (Littelfuse Inc.) offers 10 A current rating and 45 V reverse voltage with significantly lower forward voltage (580 mV @ 10 A), providing improved efficiency. Reverse leakage is higher at 2 mA @ 45 V. This part is active in production and suitable for applications where forward voltage reduction is beneficial.

For Enhanced Current Capability:

DSA30C45PB (IXYS) provides 15 A average rectified current per diode while maintaining 45 V reverse voltage. This part is suitable for applications requiring design margin above the 10 A specification. Operating temperature range extends to 175°C.

DSB60C45PB (IXYS) provides 30 A average rectified current per diode at 45 V reverse voltage. This part is suitable for high-current applications and offers the lowest forward voltage (630 mV @ 30 A) among available substitutes. Operating temperature range is -55°C to 150°C.

For Isolated Tab Configuration:

DSSK20-0045AM (IXYS) maintains 10 A current rating and 45 V reverse voltage in TO-220-3 Full Pack with isolated tab configuration. This variant is suitable for applications requiring electrical isolation of the mounting tab from the diode cathode.

Parts Not Recommended for Direct Replacement:

MBR1045CTP and SBR1045CT (SMC Diode Solutions) lack specified average rectified current ratings and show significantly higher reverse leakage (1 mA @ 45 V). These parts are not suitable for direct replacement.

10TQ045 (SMC Diode Solutions) is a single diode in TO-220-2 package, not a diode array. Circuit redesign is required for compatibility.

Frequently Asked Questions (FAQ)

Q: Can VS-MBR2045CTHN3 be used as a direct replacement for MBR1045CT?

A: Yes. VS-MBR2045CTHN3 maintains identical electrical specifications including 45 V reverse voltage, 10 A average rectified current per diode, 840 mV forward voltage at 10 A, and 100 µA reverse leakage at 45 V. The TO-220-3 package is mechanically and electrically compatible. The part is active in production with ROHS3 compliance.

Q: What is the difference between the MBR1045CT and DSA20C45PB?

A: Both parts are 45 V, 10 A Schottky diode arrays in TO-220-3 configuration. DSA20C45PB has lower forward voltage (750 mV @ 10 A versus 840 mV @ 10 A) and slightly higher reverse leakage (200 µA @ 45 V versus 100 µA @ 45 V). DSA20C45PB offers extended operating temperature to 175°C and is active in production.

Q: Can I use DSA30C45PB or DSB60C45PB as substitutes for the 10 A rated MBR1045CT?

A: Yes, with design considerations. DSA30C45PB (15 A) and DSB60C45PB (30 A) maintain the 45 V reverse voltage and TO-220-3 package. These higher-rated parts are electrically compatible and provide design margin for current handling. Forward voltage characteristics differ: DSA30C45PB at 750 mV @ 15 A and DSB60C45PB at 630 mV @ 30 A. Selection depends on application current requirements.

Q: Why is 10TQ045 not recommended as a substitute?

A: 10TQ045 is a single Schottky diode in TO-220-2 package, not a diode array. The MBR1045CT is a 1 Pair Common Cathode diode array in TO-220-3 package. The pinout and circuit configuration are fundamentally different, requiring complete circuit redesign for compatibility.

Q: What is the significance of the isolated tab variant DSSK20-0045AM?

A: DSSK20-0045AM is identical to standard TO-220-3 parts electrically but features an isolated tab configuration. The mounting tab is electrically isolated from the diode cathode. This variant is used in applications where the mounting tab must not be connected to the cathode potential, typically for thermal management without electrical connection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and have MSL rating of 1 (Unlimited), matching the original MBR1045CT specifications.

Q: What is the impact of forward voltage differences among substitutes?

A: Forward voltage differences affect power dissipation and heat generation. Lower forward voltage (DST2045C at 580 mV @ 10 A, DSB60C45PB at 630 mV @ 30 A) results in reduced power loss. Higher forward voltage (MBR1045CT at 840 mV @ 10 A) results in increased power dissipation. Selection depends on thermal design requirements and efficiency targets.

Q: Can MBR1045CTP or SBR1045CT be used as substitutes?

A: These parts are not recommended. MBR1045CTP and SBR1045CT lack specified average rectified current ratings and exhibit significantly higher reverse leakage (1 mA @ 45 V versus 100 µA @ 45 V for the original). These characteristics indicate different device performance and are not suitable for direct replacement.

Q: What is the operating temperature range consideration for substitute selection?

A: The original MBR1045CT operates from -55°C to 150°C. VS-MBR2045CTHN3 extends the lower limit to -65°C. IXYS parts (DSA20C45PB, DSA30C45PB, DSSK20-0045AM) extend the upper limit to 175°C. Selection depends on application temperature requirements. For standard -55°C to 150°C operation, all listed substitutes are suitable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message