Q201E3

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Thyristors, also known as Silicon Controlled Rectifiers (SCRs), are semiconductor devices which can control a large amount of current when triggered. The TRIAC is a type of thyristor which is specifically designed to switch AC voltages and currents. The model Q201E3, referred to as a quadrac, is one of the most popular types of TRIACs, and it is extensively used in AC switching and control applications.

The Q201E3 measures 3 x 9 mm and is designed to handle AC voltages up to 400 V, with a maximum RMS current of 3 A. It is a bidirectional thyristor, meaning that it can conduct or block current in both directions. This makes it ideal for AC switching and control applications which require the device to be able to switch on and off rapidly over a full cycle of the AC voltage wave.

The working principle of the Q201E3 is relatively simple. It consists of four thyristor elements connected in a quadrangle shape, each of which can be triggered separately. When a triggering voltage is applied to two adjacent thyristors, they will form a closed loop and conduct current. The triggering voltage can then be removed, leaving the two thyristors in a conducting state until the current drops below the latching current, at which point the thyristors will return to the off state.

The Q201E3 has numerous applications in AC control, including power switching, speed control, automatic control, light dimmer circuits, and time delay circuits. In power switching applications, it is commonly used as a relay replacement, as it can be switched on and off rapidly and it does not require as much power to operate. In speed control applications, it is used to regulate the speed of electric motors by switching the current on and off at a specific frequency. It can also be used in automatic control circuits, where it can be used to control the timing of other circuits with great accuracy, as well as in light dimmer circuits, where it is used to switch on and off at certain intervals to regulate the intensity of a light source.

In addition to these applications, the Q201E3 can also be used as a time delay circuit. This can be used to control the duration of an event by using the thyristor to switch the current on and off at certain intervals. This is commonly used to control how long a device will stay on or how long a certain process will take before it is completed.

The Q201E3 is a versatile device that can be used in a wide range of AC control applications. Its compact size and efficient operation make it an attractive choice for many types of AC switching and control applications. Its precise triggering and latching characteristics make it ideal for applications where precise control over the on and off times is required.

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