MBRF2045CTU Equivalent & Substitute Parts

Part Overview

The MBRF2045CTU is a Schottky diode array manufactured by SMC Diode Solutions, configured as a 1 Pair Common Cathode arrangement with a maximum reverse voltage rating of 45 V. This component is packaged in a TO-220-3 Full Pack with isolated tab configuration for through-hole mounting applications. The part is currently Active in product status with 705 units in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications. Substitution becomes necessary due to component availability, supply chain considerations, or specific application requirements that align with the defined parameter specifications.

Substiute Parts

MBRF2045CTU

SMC Diode SolutionsIn Stock: 801MBRF2045CTU Datasheet

Current PartRFQ

DSTF4045C

Littelfuse Inc.In Stock: 1054DSTF4045C Datasheet

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MBRF2545CT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1531MBRF2545CT-E3/45 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBRF2045CTU are qualified based on the following critical parameters that must align for direct replacement:

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
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Compatible Variation Parameters:

• Current - Average Rectified (Io) (per Diode): May vary based on application requirements
• Voltage - Forward (Vf) (Max) @ If: Acceptable within circuit design margins
• Current - Reverse Leakage @ Vr: Acceptable within circuit design margins
• Operating Temperature - Junction: Extended ranges acceptable for broader application support
• RoHS and Compliance Status: ROHS3 Compliant required

The substitute parts listed below satisfy all mandatory matching parameters and maintain electrical and mechanical compatibility with the MBRF2045CTU.

Parameter Comparison

Engineering Selection Recommendations

All three components—MBRF2045CTU, DSTF4045C, and MBRF2545CT-E3/45—are Active products with ROHS3 compliance and MSL Level 1 ratings, confirming suitability for production and long-term availability.

DSTF4045C (Littelfuse Inc.) provides the highest current capacity at 20 A per diode with extended operating temperature range to 150°C. This substitute is appropriate for applications requiring higher current handling or broader thermal operating margins while maintaining the 45 V reverse voltage specification.

MBRF2545CT-E3/45 (Vishay General Semiconductor - Diodes Division) offers the lowest reverse leakage current at 200 µA @ 45 V and the widest operating temperature range from -65°C to 150°C. This substitute is appropriate for applications with stringent leakage requirements or extreme temperature environments.

MBRF2045CTU (SMC Diode Solutions) remains the baseline reference with specified forward voltage of 500 mV @ 10 A and reverse leakage of 1 mA @ 45 V. Selection of this part is appropriate when the original specification parameters are required.

All substitutes maintain identical mechanical packaging (TO-220-3 Full Pack, Isolated Tab), mounting type (Through Hole), and core Schottky diode array configuration (1 Pair Common Cathode), ensuring direct physical and electrical compatibility within circuit designs.

Frequently Asked Questions (FAQ)

Q: Can DSTF4045C replace MBRF2045CTU in all applications?

A: DSTF4045C is electrically and mechanically compatible with MBRF2045CTU. Both components share identical reverse voltage (45 V), diode configuration (1 Pair Common Cathode), package type (TO-220-3 Full Pack, Isolated Tab), and fast recovery speed characteristics. DSTF4045C provides higher current capacity (20 A) and extended temperature range (-55°C to 150°C), making it suitable for applications within these specifications.

Q: What is the primary difference between MBRF2545CT-E3/45 and MBRF2045CTU?

A: The primary differences are reverse leakage current and operating temperature range. MBRF2545CT-E3/45 exhibits lower reverse leakage (200 µA @ 45 V versus 1 mA @ 45 V) and operates across a wider temperature range (-65°C to 150°C versus -55°C to 125°C). Both maintain the same 45 V reverse voltage rating and TO-220-3 package configuration.

Q: Are all substitute parts RoHS compliant?

A: Yes. MBRF2045CTU, DSTF4045C, and MBRF2545CT-E3/45 are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), confirming compliance with environmental and handling standards.

Q: Does package compatibility differ among these parts?

A: No. All three components use identical packaging: TO-220-3 Full Pack with Isolated Tab for through-hole mounting. Physical and electrical pin configurations are equivalent, allowing direct board-level substitution.

Q: What forward voltage differences exist among these diodes?

A: Forward voltage specifications vary with current rating. MBRF2045CTU specifies 500 mV @ 10 A, DSTF4045C specifies 580 mV @ 20 A, and MBRF2545CT-E3/45 specifies 820 mV @ 30 A. These differences reflect the current-dependent behavior of Schottky diodes and must be evaluated within specific circuit operating conditions.

Q: Which substitute offers the best performance for high-temperature applications?

A: MBRF2545CT-E3/45 and DSTF4045C both support operating temperatures to 150°C, compared to MBRF2045CTU at 125°C maximum. MBRF2545CT-E3/45 extends the lower temperature limit to -65°C, providing the widest thermal operating window.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes. All three components share identical TO-220-3 Full Pack, Isolated Tab package geometry and through-hole mounting requirements. Direct substitution on existing printed circuit boards is mechanically and electrically feasible without layout modifications.