MBRF2045CT-E3/45 Equivalent & Substitute Parts

Part Overview

The MBRF2045CT-E3/45 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 10 A average rectified current per diode. The device is packaged in a TO-220-3 Full Pack with isolated tab (ITO-220AB) for through-hole mounting applications.

The MBRF2045CT-E3/45 maintains Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical ratings, diode configuration, package type, and thermal operating range to ensure functional interchangeability in circuit designs.

Substiute Parts

MBRF2045CT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 4856MBRF2045CT-E3/45 Datasheet

Current PartRFQ

STPS2045CFP

STMicroelectronicsIn Stock: 1549STPS2045CFP Datasheet

DirectRFQ

MBRF2045CTG

onsemiIn Stock: 15781MBRF2045CTG Datasheet

UpgradeRFQ

MBRF2545CTG

onsemiIn Stock: 17482MBRF2545CTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRF2045CT-E3/45 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode Configuration: 1 Pair Common Cathode (pinout and functional topology)
• Voltage - DC Reverse (Vr) (Max): 45 V (minimum voltage rating)
• Current - Average Rectified (Io) (per Diode): 10 A or greater (current capacity)
• Technology: Schottky (switching characteristics and forward voltage behavior)
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io) (transient response)

Mechanical and Environmental Compatibility Requirements:

• Mounting Type: Through Hole (PCB assembly method)
• Package / Case: TO-220-3 Full Pack (physical form factor and pin spacing)
• RoHS Status: RoHS3 Compliant (regulatory compliance)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (storage and handling requirements)

Substitute parts must satisfy all electrical parameters at or above the main part specifications and maintain identical mounting and packaging characteristics. Parts with higher current ratings (12.5 A) or extended temperature ranges remain functionally compatible when other parameters align.

Parameter Comparison

Engineering Selection Recommendations

STPS2045CFP (STMicroelectronics) - Direct Equivalent

The STPS2045CFP is a direct electrical and mechanical equivalent to the MBRF2045CT-E3/45. Both devices share identical voltage ratings (45 V), current ratings (10 A per diode), diode configuration (1 Pair Common Cathode), and package type (TO-220-3 Full Pack). The STPS2045CFP exhibits lower forward voltage (570 mV vs. 650 mV @ 10 A), which reduces power dissipation. Both parts maintain RoHS3 compliance and MSL 1 rating. The STPS2045CFP is currently in Active product status with 1490 units in stock. This part is suitable for direct substitution in new designs and existing applications.

MBRF2045CTG (onsemi) - Functional Equivalent with Obsolete Status

The MBRF2045CTG matches all electrical specifications of the MBRF2045CT-E3/45 with identical voltage (45 V), current (10 A), and diode configuration. The part features an extended maximum junction temperature of 175°C compared to 150°C for the main part. However, the MBRF2045CTG carries Obsolete product status, indicating discontinued manufacturing. While 15731 units are currently in stock, this part should not be selected for new designs. Existing applications using this part may continue operation, but long-term availability is not assured.

MBRF2545CTG (onsemi) - Higher Current Upgrade

The MBRF2545CTG is a higher-current variant rated for 12.5 A per diode versus 10 A for the MBRF2045CT-E3/45. Both parts maintain 45 V reverse voltage rating and identical diode configuration. The MBRF2545CTG is suitable for applications requiring increased current capacity within the same voltage class and package form factor. This part is in Active product status with 17400 units in stock. Selection of this part is appropriate when circuit design permits the higher current rating and associated forward voltage increase (700 mV @ 12.5 A).

Frequently Asked Questions (FAQ)

Q: Can the STPS2045CFP replace the MBRF2045CT-E3/45 in existing designs?

A: Yes. The STPS2045CFP is electrically and mechanically equivalent. Both parts feature 45 V reverse voltage, 10 A current rating, 1 Pair Common Cathode configuration, and TO-220-3 Full Pack packaging. The STPS2045CFP exhibits lower forward voltage (570 mV vs. 650 mV @ 10 A), which improves efficiency. Direct substitution is supported without circuit modification.

Q: What is the difference between the isolated tab and standard TO-220-3 packages?

A: The MBRF2045CT-E3/45 uses ITO-220AB packaging with an isolated tab, providing electrical isolation between the tab and the diode cathode. The STPS2045CFP and MBRF2045CTG use standard TO-220-3 Full Pack packaging. Verify PCB design and thermal management requirements to confirm package compatibility. If isolation is required, the isolated tab variant must be specified.

Q: Why is the MBRF2045CTG listed as Obsolete?

A: The MBRF2045CTG has been discontinued by onsemi. Although inventory remains available, this part should not be selected for new product designs due to uncertain long-term supply. The STPS2045CFP (STMicroelectronics) or MBRF2545CTG (onsemi) are recommended for new applications.

Q: When should the MBRF2545CTG be selected instead of the MBRF2045CT-E3/45?

A: The MBRF2545CTG is selected when circuit design requires current capacity exceeding 10 A per diode. The MBRF2545CTG is rated for 12.5 A and maintains the same 45 V voltage rating and TO-220-3 package. Forward voltage increases to 700 mV @ 12.5 A. Thermal design must account for increased power dissipation at higher current levels.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The STPS2045CFP, MBRF2045CTG, and MBRF2545CTG are all RoHS3 compliant, matching the compliance status of the MBRF2045CT-E3/45. All parts are suitable for applications requiring regulatory compliance with RoHS3 standards.

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

A: Forward voltage differences directly affect power dissipation and thermal performance. The STPS2045CFP and MBRF2045CTG exhibit 570 mV forward voltage versus 650 mV for the main part, reducing power loss by approximately 12% at 10 A. The MBRF2545CTG at 700 mV @ 12.5 A increases power dissipation due to higher current operation. Thermal design calculations must incorporate the specific forward voltage of the selected part.

Q: Can the MBRF2045CT-E3/45 be used in applications rated for the MBRF2545CTG?

A: No. The MBRF2045CT-E3/45 is rated for 10 A maximum current per diode. Applications designed for 12.5 A operation require the MBRF2545CTG. Using an undersized part in a higher-current application results in excessive power dissipation, thermal stress, and potential device failure.

Q: What is the moisture sensitivity level (MSL) requirement for these parts?

A: The MBRF2045CT-E3/45, STPS2045CFP, and MBRF2045CTG all carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage or handling. The MBRF2545CTG carries MSL Not Applicable, also indicating no moisture sensitivity constraints.