AQV202A

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Solid state relays are electronic relay devices that use a triggering signal, such as a PWM signal or a square wave signal, to control a low-power output circuit. These devices have no moving contacts and allow easy installation and long life expectancy. The AQV202A is one of the most popular solid state relays available on the market, highly reliable and robust, and designed for general purpose switching applications.

The AQV202A is a single-pole, normally open (SPNO) form of solid state relay. It includes a triac with integral zero-crossing detector, a heat sink plate and a bridge rectifier integrated, resulting in fewer components and a self-protected environment. It offers contactless switching capability for low power control applications, such as lighting and heating. It can be used with voltages up to AC 280V or DC 140V and with currents up to 16A.

The main components for a solid state relay are the LED assembly, trigger circuit, SCR (silicon controlled rectifier) or triac, and output contacts. The LED assembly is the input for the relay and can be driven by an optically isolated input or direct processing or PWM signals. The trigger circuit employs a comparator and oscillator circuit, which specifies the operating conditions. The SCR or triac is connected between the main power supply (consisting of either AC or DC power) and the output contacts.

The working principle of the AQV202A solid state relay is based on opto-isolated Red/Green LEDs operation. The output of an opto-isolated input circuitry triggers the MOSFET which in turn closes thetriac. When the input signal increases to 0.7V, the LED increases its brightness to 1.5V. At this point, the MOSFET is triggered and the triac is activated to control high power signal. When the input voltage decreases to 0.3V, the LED turns off and the MOSFET and the triac are deactivated.

The AQV202A has a wide range of applications, ranging from consumer electronics to industrial automation. It can be used to control a variety of devices such as ovens, refrigerators, air conditioners, ceiling lights, and contactors. This solid state relay can be used in a variety of electric ovens, electric motors, and electromechanical equipment. It is an excellent choice for automotive and industrial applications where shock and vibration resistance is needed.

The AQV202A solid state relay is ideal for applications demanding high reliability, robustness, and long life due to its contactlesss switch, integrated heat sink, and waterproof casing. The device is easy to install and maintain due to its single-pole, normally open form and its wide operating range up to AC 280V or DC 140V and 16Amps. This solid state relay is an ideal choice for general purpose switching applications as it provides contactless switch for low power control.

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