DSTF4045C

Diode Arrays Overview

The Littelfuse DSTF4045C is a Schottky Barrier Rectifier featuring a dual common cathode configuration housed in an ITO-220AB package. It provides a peak inverse voltage of 45V and supports a total average forward current of 40A, with 20A per leg at a case temperature of 90°C. The device exhibits ultra-low forward voltage drops ranging from 0.31V to 0.58V depending on current and junction temperature. It withstands a non-repetitive surge current of 240A per leg and operates within a junction temperature range of -55°C to +150°C.

Diode Arrays Feature Summary

• Ultra-low forward voltage drop for high efficiency
• High frequency operation capability
• Guard ring structure for enhanced ruggedness and long-term reliability
• Common cathode configuration in ITO-220AB package

Diode Arrays Applications

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

Diode Arrays Procurement Notes

Verify the specific package variant against the datasheet, as the DSTF series includes D2-PAK, D-PAK, TO-220AB, and ITO-220AB options. Confirm that the required configuration matches the common cathode designation. Ensure thermal management aligns with the specified junction-to-case thermal resistance. Check for RoHS compliance requirements if applicable to the end product. Validate marking codes for traceability purposes.

Diode Arrays Selection Notes

Select this component when low conduction losses are critical in high-frequency rectification circuits. The ITO-220AB package offers electrical isolation suitable for applications requiring heat sink mounting without external insulators. Consider the 45V rating for low-voltage DC systems. Evaluate thermal performance based on the 5.0 °C/W junction-to-case resistance per leg under DC operation conditions.

Diode Arrays Part Context

This device belongs to the Littelfuse DST series of Ultra Low VF Schottky Barrier Rectifiers. The series is engineered to meet commercial and industrial application requirements by providing high temperature stability, low leakage current, and reduced forward voltage characteristics compared to standard rectifiers.

Diode Arrays Replacement Considerations

Direct substitutes include other Littelfuse DST series parts with matching voltage and current ratings, such as the DSTF4050C (50V). Verify pinout compatibility and thermal resistance specifications before substitution.

Diode Arrays FAQ

What is the maximum non-repetitive surge current per leg?

The maximum peak one-cycle non-repetitive surge current is 240A per leg, measured under an 8.3 ms half-sine pulse condition.

Does the device support high-temperature operation?

Yes, the junction temperature range extends up to +150°C, and it maintains functionality at elevated temperatures with increased reverse current.

What is the typical junction capacitance?

The typical junction capacitance per leg is 840 pF, measured at 5V reverse voltage, 25°C case temperature, and 1MHz signal frequency.