BTW69-1200RG

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Thyristors - SCRs

A Thyristor--also referred to as a Silicon Controlled Rectifier (SCR)--is a electronic device primarily utilized for controlling power in integrated or power electronic circuits. The name Thyristor is derived from the Greek word Thyros meaning \'door\' because of its gate-like region and because it is a similar function, acts like a switch. A BTW69-1200RG Thyristor is a high voltage, high current device with an ultra low on-state resistance suitable for applications including hard switching in power converters, load disconnect and cut-off applications and soft switching in dimming systems.

BTW69-1200RG Application Field

BTW69-1200RG Thyristors are utilized in several applications and industries including automobile, industrial and telecommunications. They are typically employed for AC or DC electronic rectification and for smooth or discontinuous mode commutation applications. In rectification applications, the BTW69-1200RG enables fast, efficient power conversion from AC to DC without the need for a transformer. In dimming applications, they provide an easy, cost-effective way of controlling the light output of any lightsource via a low-power controller. For industrial applications, they can be utilized to regulate motor speed, provide motor control and to create over-current protection.

BTW69-1200RG Working Principle

These Thyristors work with a working principle referred to as the Four-layer Model. The four layers needed to make up a BTW69-1200RG Thyristor are the emitter (E), base (B), reversed biased junction transistor and the collector (C). The three electrodes (E, B and C) are connected to external electrical networks in order for the device to properly function. When a positive voltage is applied to the anode of a BTW69-1200RG Thyristor, an avalanche breakdown event occurs in the reversed biased junction transistor and its associated network, which in turn acts as an "on" switch creating a path for current flow.

In addition to the avalanche breakdown, the device itself has several characteristics that contribute to its functionality. First, these Thyristors possess two important characteristics when compared to other devices--they have a low forward voltage drop and a low off-state leakage current. This allows the device to reduce power loss and improve efficiency when compared to other devices. A second characteristic is that they operate at high temperatures, making them suitable for applications in extreme operating environments. Finally, they have very low gate current requirements, or the amount of current needed to turn the device on, which allows them to run at high switching speeds even at low gate current levels.

BTW69-1200RG Thyristors are designed to control high power applications that require high speed switching and low on-state losses. Their low gate current requirement means they can switch quickly, while the high temperature operation enables their use in demanding environments. The main advantage of these devices is the simple four-layer structure, which requires little space and allows the efficient conduction of current.

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