QK012NH5RP

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Thyristors - TRIACs

A TRIAC is a three-terminal semiconductor switch and is a widely used variant of the SCR (silicon-controlled rectifier). The TRIAC operates like two SCRs operated in parallel but controlled by the same gate signal. The QK012NH5RP is an example of a TRIAC. This device is a standard TRIAC with a rated current of 12 A and a maximum repetitive peak off-state voltage of 400 V. Here, we\'ll discuss the application field and working principles of the QK012NH5RP.

Application field of QK012NH5RP

The QK012NH5RP is a standard TRIAC that has several practical applications, such as making simple full-wave motor controls, switching AC power supplies, and switching/controlling light dimmers. In addition, this device can be used in other applications that require a reliable, high-power switch, such as AC line power switching, AC power control, AC motor speed control, and heat control.

Working Principle of the QK012NH5RP

The QK012NH5RP is a thyristor that operates on a single power supply. It consists of three terminals ( terminal 1, 2, and the gate terminal ). When a positive voltage is applied to terminal 1, the TRIAC is switched on and passes current from terminal 1 to terminal 2. When the positive voltage applied to the gate terminal is greater than the voltage on the main terminals, the TRIAC will switch off, blocking current from flowing. The QK012NH5RP can be switched on and off until the maximum peak value of the current that flows through the TRIAC is reached. When the peak current of the TRIAC is reached, the TRIAC turns off until the peak current drops below a certain level.

In summary, the QK012NH5RP is a standard TRIAC that has many practical applications. It is used to switch and control AC loads, such as AC power supplies, light dimmers, and motor controls. This device is switched on and off using a gate signal, and it can handle a maximum peak current up to 12 A. This makes it a reliable and popular choice for many AC power applications.

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