MBRF2045CT

Diode Arrays Overview

The Littelfuse MBRF2045CT is a dual Schottky barrier rectifier housed in an electrically isolated ITO-220AB package. It features a common cathode configuration with two independent legs, each rated for a peak inverse voltage of 45V and an average forward current of 10A at 105°C case temperature. The device supports a total average forward current of 20A and withstands a non-repetitive surge current of 180A per leg. Key electrical parameters include a maximum forward voltage drop of 0.84V at 20A and 25°C junction temperature, and a reverse leakage current of 1.0mA at rated voltage and 25°C.

Diode Arrays Feature Summary

• Guard ring construction provides enhanced ruggedness and long-term reliability under transient conditions.
• Low forward voltage drop design minimizes power loss and improves overall system efficiency.
• High junction temperature capability ensures stable operation across the specified thermal range.
• Electrically isolated ITO-220AB package allows for direct heatsink mounting without external insulators.

Diode Arrays Applications

• Switching mode power supplies
• Free-wheeling diodes
• DC/DC converters
• Polarity protection diodes

Diode Arrays Procurement Notes

Verify that the ordered component matches the specific Littelfuse MBRF2045CT designation to ensure correct ITO-220AB packaging and isolation ratings. Confirm compliance with RoHS standards if required by your assembly process. Cross-reference datasheet specifications against your thermal management requirements, particularly the junction-to-case thermal resistance and maximum operating temperatures, to validate suitability for your specific application environment.

Diode Arrays Selection Notes

Select this component when a dual Schottky rectifier with high-frequency switching capabilities is required in an isolated through-hole package. The common cathode arrangement simplifies circuit layout for synchronous rectification or polarity protection tasks. Ensure the application operates within the 45V reverse voltage limit and respects the 10A per leg current rating at elevated case temperatures to maintain performance and longevity.

Diode Arrays Part Context

This part belongs to the Littelfuse MBR series of Schottky Barrier Rectifiers, designed for commercial applications requiring high temperature stability and low leakage. The 'F' in the model number denotes the specific ITO-220AB package style, distinguishing it from standard TO-220 variants. The series emphasizes low forward voltage and high frequency operation, making it suitable for modern efficient power conversion topologies.

Diode Arrays Replacement Considerations

Direct replacements must match the 45V reverse voltage, 2x10A current rating, and ITO-220AB package. Verify pinout compatibility, as other manufacturers may use different lead arrangements for common cathode configurations in similar packages.

Diode Arrays FAQ

What is the isolation voltage rating of the MBRF2045CT?

The isolation voltage depends on the mounting method: 4500V with clip mounting away from the heatsink edge, 3500V with clip mounting inside the heatsink, and 1500V with screw mounting inside the heatsink.

How does the junction capacitance affect high-frequency performance?

The typical junction capacitance is 400pF per leg at 5V reverse bias and 25°C, which supports high-frequency operation in switching mode power supplies and DC/DC converters.

What is the maximum thermal resistance from junction to case?

The maximum thermal resistance from junction to case is 5.0 °C/W per leg under DC operation conditions.