AQZ207G

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Solid State Relays (SSRs) are commonly used in the automation and control technology industries. As fast switching and energizing components, they allow electrical signals to control large amounts of power. The AQZ207G is a particularly popular type of SSR because of its flexible and complementary design, which makes it suitable for a variety of applications.

The AQZ207G SSR Design

The AQZ207G is available in both zero-cross and instantaneous switching versions, and it is UL, CUL, VDE, EN, and RoHS approved. The zero-cross models use two semiconductor thyristors arranged back-to-back and a heater element to provide accurate and reliable power switching. On the other hand, the instantaneous models use a solid-state triac as the switch that allows the SSR to be energized by an AC or DC signal. This type of SSR is usually used in applications where an extremely fast switching speed is required.

AQZ207G Application Field and Working Principle

The AQZ207G SSR is typically used in systems that require precision control of current and voltage. It is particularly suitable for applications involving DC and AC motor control, as well as industrial process control applications such as packaging machines and PLCs. It can also be used in parallel operation or SINUS-PWM operation, where an SSR is energized and triggered simultaneously for fast switching in applications where high frequency switching is required.

The AQZ207G is a zero-cross SSR, meaning that it switches the load on and off at the zero crossing of the AC power wave. This process is known as ‘zero voltage switching’ (ZVS) and it minimizes the amount of generated EMI and audible noise since the SSR does not actually turn on until the current drops to zero. This is achieved by attaching a zinc oxide surge protector-type device (known as a ‘clearing unit’) to the SSR, which takes the energy from the AC waveform and sends it back to the circuit to provide a clear zero-cross turn-on.

This type of SSR can be used in a wide variety of applications, as it allows for precise energy control and quick switching. It also eliminates the need for moving contact points, which reduces maintenance costs and makes it particularly suitable for applications that require multiple switching events per second, such as motor control or similar high-frequency operations.

The AQZ207G is also reliable and two versions are available for selection. These include an AC input (QZ07G) and DC input (QD07G) version. Both offer industry-standard, 16 A load current carrying capability. The device works in both AC and DC ranges (20-250 volts); hence it is an excellent option for systems that need to switch between AC and DC voltages.

The AQZ207G is an ideal choice for automated control systems or applications requiring a high degree of accuracy and reliability. Its zero-cross design ensures accurate timing control and eliminates EMI interference. In addition, its small size and low cost make it an attractive option for a variety of applications.

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