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Solid State Relays

A solid state relay (SSR) is a type of switching device that uses electrical signals to control an electrical circuit. It is an electronic, non-mechanical device which provides a reliable, fast and efficient electrical switching and control solution. SSRs are often used for the electrical control of heating and cooling applications, for example for an oven, fridge or motor. They have the advantage of being able to switch on and off a circuit in a fraction of a second, with no delay, and can be controlled remotely, from a central location.

AQR20A2-S-Z10/18VDC Application Field And Working Principle

The AQR20A2-S-Z10/18VDC is a solid state relay which is typically used for controlling high power electronic or electrical devices. It is a double pole double throw (DPDT) contact designed to switch a motor, heater, or other AC load of up to 16 A. This SSR is suitable for use in applications such as air-conditioners, motor control, automotive and industrial equipment, and building automation.The AQR20A2-S-Z10/18VDC SSR operates on an input voltage range of 3 to 18 VDC, and is capable of switching up to 16A resistive load at 250 VAC. It is equipped with two normally open (NO) and two normally closed (NC) contacts, and can be set up in either a single-pole double-throw (SPDT) or a double-pole double-throw (DPDT) configuration.The SSR’s operating principle is that an electrical signal on its control port (EX) is used to trigger a switch on its output side, which in turn controls an electrical device. The triggering action is controlled by a semiconductor such as a TRIAC. When the electrical signal is applied to the control port, a small current flows through the device, which activates the TRIAC, allowing the connected load to also switch on. When the trigger is released, the TRIAC is turned off again and the load is consequently switched off as well.

Key Advantages of AQR20A2-S-Z10/18VDC

The AQR20A2-S-Z10/18VDC SSR offers several key advantages over mechanical relays:

• High switching frequency – With a typical switching speed of 50kHz, this SSR is one of the fastest available on the market. This allows for faster control of the connected device.
• Long life – Solid state relays typically display a long lifetime, as they have no moving parts. This increases reliability and reduces the need for maintenance and replacement.
• High switching power – The AQR20A2-S-Z10/18VDC SSR can switch up to 16 A at 250 VAC, far more than most mechanical relays.
• Low power consumption – Solid state relays require very little power when switching, making them very energy efficient.
• Compact size – The AQR20A2-S-Z10/18VDC SSR is one of the most compact available, making it ideal for applications where space is at a premium.
• Noise immunity – As the AQR20A2-S-Z10/18VDC SSR does not rely on moving parts, it is more immune to environmental noise.

Conclusion

The AQR20A2-S-Z10/18VDC is a solid state relay ideal for controlling high power electronic and electrical devices. Its high switching frequency, long life, high switching power, low power consumption, compact size and noise immunity make it an attractive choice for a range of industrial and consumer applications.

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