SDT40H120CTFP

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Diodes are devices that allow the flow of electrical current in one direction, while obstructing flow in the opposite direction. Rectifiers are devices that converts alternating current (AC) electricity, which periodically switches direction, into direct current (DC) electricity, which only flows in one direction. Diodes and rectifiers are great for smoothing out electrical pulses or blocking higher voltage from electronics. Arrays are diodes and rectifiers packaged together in one component.
The SDT40H120CTFP, also known as a DIRECTFET Power MOSFET, is a 4 by 10-cell power MOSFET array. It is a high-temperature device that can operate up to 175°C junction temperature and 175°C storage temperature, designed with N-Channel and P-Channel Cell Optimization. The SDT40H120CTFP has an avalanche energy capability of 6.5mJ and a repetitive avalanche capability of at least 3uJ, to withstand harsh environmental conditions. SDT40H120CTFP is part of DirectFET power MOSFETs, from International Rectifier (IR). DirectFETs are an advanced power MOSFET technology that combines an array of two or four cells optimally designed for high frequency switching performance and reliability.
The main application field for the SDT40H120CTFP is in switched power and driving applications such as Automotive and Industrial applications, audio, digital circuits, power management, and non-isolated DC-DC converters. This device can also be used in applications such as welding inverters, telecom, automotive and computer power supplies. It is optimized to meet the low switch voltage requirement needed to drive an H-bridge circuit or software controlled motor drive applications.
The SDT40H120CTFP is a power MOSFET and as such its working principle is based on the same principle as any other MOSFET. That is, when sufficient voltage is applied between the gate and the source of the device, a conducting channel is formed between the drain and the source. As with most power MOSFETs, this channel can be varied by changing the gate voltage. This allows for a much better control over the amount of current that is able to flow through the device. This can be useful for motors, solenoids, and other loads that require variable current.

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