VS-SD700C30L

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Diodes are components of electronics that are tasked to control the direction of the current flow. Rectifiers are a type of diode which are used for converting alternating current (AC) to direct current (DC), as well as for frequency control, signal mixing, and also for switching. Within the range of rectifiers available, single diodes are one of the most common. One of the single diodes present on the market is the VS-SD700C30L, and in this article, we will be exploring its application field and working principle.

VS-SD700C30L is a single type semiconductor rectifier, meaning it is composed of one semiconductor layer, making it suitable for switching and rectifcation solutions in industries such as communications and automotive. The VS-SD700C30L can handle peak repetitive reverse voltage of 700V and average forward current of 30A. The package containing the diode is hermetically sealed, providing great durability and stability. In terms of thermal resistance, it has a junction to case thermal resistance of 250°C/W which ensures the diode is capable of dissipating heat.

VS-SD700C30L’s working principle is based on that of a normal diode already mentioned above, with the use of an anode and cathode connection. When the diode is forward biased, the electron flow from the negative to the positive terminal. This flow is enabled by current holes present in the P-type Silicon layer, as shown in figure 1. On the other hand, when the diode is reversed biased, as depicted in Figure 2, the electrons from the anode are pulled into the P-type layer and a depletion layer is created. This depletion layer will expand or become smaller depending on the biasing of the diode and the external applied voltage, preventing current flow in the process.

Figure 1: A diode in forward bias

Figure 2: A diode in reverse bias

Since the VS-SD700C30L is a single diode, it has various application fields. It can be used for the rectification of bridge circuits, with no external circuitry, as the series resistance of the diode itself is able to keep it safe in overcurrent conditions. It may also be used to create an electrolytic capacitor bank in combiner boxes, by using rectifiers that are connected in parallel. Reactors or snubbers connected in parallel may also be used in order to reduce the inductive effects of the converter.

Additionally, the hermetical packaging of the VS-SD700C30L allows it to be used in electrically hostile atmospheres, besides the regular electrical applications. Examples include: gas chromatography/mass spectrometers, oil exploration and testing equipment, aerospace systems and satellite systems. Some oil-industry applications require single diodes to rectify the 100ft high voltages found into power circuits, making the VS-SD700C30L ideal for such usages.

To conclude, the VS-SD700C30L rectifier is a single diode with application fields ranging from standard electrical systems to oil exploration and aerospace applications. Its hermetically sealed package design helps keep the diode durable, while its relative low thermal resistance means it is able to dissipate most heat produced by it. The diode’s working principle is based on the anode and cathode connection, while its series resistance helps make the diode safe in case of overcurrent.

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