SDT40A120CT

Diode Arrays Overview

The SDT40A120CT is a Trench Schottky Rectifier manufactured by Diodes Incorporated, available in TO220AB and ITO220AB packages. It features dual anode common cathode configuration with per-leg ratings of 120V repetitive reverse voltage (VRRM) and 20A average rectified output current (IO). The device exhibits a maximum forward voltage drop (VF) of 0.88V at 25°C and 0.73V at 125°C when conducting 20A. Reverse leakage current (IR) is specified at 120µA at 25°C and 25mA at 125°C under 120V reverse bias. Non-repetitive peak forward surge current (IFSM) reaches 250A for the TO220AB package. Operating junction temperature range spans from -55°C to +150°C.

Diode Arrays Feature Summary

• Low forward voltage drop for improved efficiency
• Excellent high-temperature stability with controlled reverse leakage
• Soft and fast switching capability
• Lead-free finish compliant with RoHS directives

Diode Arrays Applications

• DC-DC converters
• AC-DC adaptors
• Freewheel diode circuits
• Blocking diode applications

Diode Arrays Procurement Notes

Verify the specific package variant required, as the standard TO220AB (SDT40A120CT) differs thermally from the isolated ITO220AB (SDT40A120CTFP). Confirm thermal resistance requirements against the datasheet values of 2°C/W for generic packages versus 4°C/W for insulated variants. Ensure compliance with AEC-Q100/101 standards if automotive qualification is necessary, as standard parts may not meet these specific change control requirements.

Diode Arrays Selection Notes

Select based on thermal management needs; the generic TO220AB offers lower thermal resistance compared to insulated versions. Verify that the application current does not exceed the 20A per leg rating without appropriate derating. Consider the surge current capacity of 250A for the standard package if inrush currents are significant. Ensure the operating environment stays within the -55°C to +150°C junction temperature limits.

Diode Arrays Part Context

This component belongs to the SDT series of Trench Schottky Rectifiers from Diodes Incorporated. It utilizes trench technology to achieve low forward voltage and high-temperature stability. The series includes various voltage and current ratings, with this specific part offering a 120V blocking capability and 40A total current handling in a dual common cathode arrangement suitable for through-hole mounting.

Diode Arrays Replacement Considerations

SDT40A120CTFP serves as the electrically equivalent insulated alternative within the same product family.