PD3S140-7 Discrete Semiconductor Products

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Diodes are electronic components that only allow electricity to flow in one direction. Rectifiers are circuits that convert alternating current (AC) to direct current (DC). The PD3S140-7 is a single rectifier diode, featuring low forward voltage drop, low reverse leakage current, and a higher current capacity than its predecessor, the PD3S140-6. Its application field primarily lies in power control, conversion, and protection.

The PD3S140-7 is a silicon diffusion rectifier diode with a maximum working voltage of 140V and maximum reverse leakage current of 20µA. It is capable of dissipating a maximum power of 600W and offers a forward voltage drop of 1.3V at a forward current of 7A. The junction temperature is specified at 125°C, with a temperature coefficient of 0.85%/°C, and a reverse recovery time of 8ns.

Due to its low voltage drop, the PD3S140-7 is suitable for high frequency and high efficiency rectification, especially for conversion of AC current to DC and other power control applications such as motor speed control and power converters. In addition, it is well suited for use as a protection circuit in AC or DC power converters and switching circuits, as its low reverse leakage current helps to improve power efficiency.

The PD3S140-7 works by using the principle of diode rectification, which is achieved using a PN junction diode. When designed as a rectifier, a PN junction diode operates by passing electric current through the diode in one direction while blocking current flow in the opposite direction. This occurs because the current rectifying action of the diode is only able to occur when the anode is more positive than the cathode. When this occurs, the PN junction is said to be in a forward-biased condition, allowing for current to flow through the diode. Conversely, when the anode is more negative than the cathode, the PN junction is said to be in a reverse-biased condition, which stops all current from passing through the diode.

The PD3S140-7 also contains a bypass diode, which is wired parallel to the primary diode to provide an alternate path for current to flow when the primary diode is reverse-biased. This allows for the device to remain operational and for power supply to remain uninterrupted and consistent. Without the bypass diode, large amounts of current would build up in the primary diode and the device would eventually fail due to thermal and other electrical stresses.

In conclusion, the PD3S140-7 is a single rectifier diode suitable for a variety of power control, conversion, and protection applications. It features a low forward voltage drop, low reverse leakag current, and a higher power capacity than other single rectifier diodes. The PD3S140-7 operates on the principle of diode rectification, whereby it permits current to flow through the PN junction when it is in a forward-biased condition and blocks current flow when it is in a reverse-biased condition. In addition, the device contains a bypass diode which allows for alternate paths of current flow and prevents large amounts of current from building up.

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