AQY212SZ Relays

Series:	PhotoMOS™ AQY
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC, DC
Voltage - Input:	1.14VDC
Voltage - Load:	0V ~ 60V
Load Current:	500mA
On-State Resistance (Max):	2.5 Ohms
Termination Style:	Gull Wing
Package / Case:	4-SOP (0.173", 4.40mm)
Supplier Device Package:	4-SOP

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Solid State Relays – AQY212SZ Application Field and Working Principle

Solid state relays, also known as optically isolated relays, semiconductor relays, or electric relays, are a type of electromechanical switch used to control a large voltage and current with a small control signal. AQY212SZ solid state relays from Autonics are a type of SSR that offer enhanced performance and feature optimised structure with a high degree of insulation. The Autonics AQY212SZ is suitable for a range of applications such as street lighting, HVAC controls and PLCs.

Types of Solid State Relays

Solid state relays have two main types: static and dynamic. The static type uses a semiconductor device such as a thyristor or a SCR, while the dynamic type utilizes active electronic components such as transistors, FETs and optically isolated MOSFETs. The AQY212SZ is a dynamic type SSR featuring a single phase bridge control, which is optimised for applications with short cycle times such as hand tremble, gear control and conveyor systems.

Features of the AQY212SZ

The AQY212SZ from Autonics has a range of features that make it one of the most reliable and long lasting SSRs on the market. Some of these features include a built in RC snubber circuit, a reverse voltage protection, low noise operation, and an extended insulation distance. It also has a maximum load current of 8A, a maximum voltage range of 250 VAC, and utilises 4-pin MOS FET switching technology.

AQY212SZ Working Principle

The Autonics AQY212SZ is a dynamic optically isolated SSR featuring a single phase bridge control. This type of SSR is designed for applications with short cycle times such as hand tremble, gear control and conveyor systems. The working principle of the AQY212SZ is simple. When a control signal is applied, the LED inside the SSR will switch on. This will cause the MOSFET to be energised, allowing current to flow from the input to the output of the SSR. When the control signal is removed, the MOSFET will be de-energised, blocking the current and preventing it from flowing from the input to the output.

Conclusion

The Autonics AQY212SZ is a dynamic type of SSR that offers enhanced performance, reliability, and safety features. Its optimised structure with a high degree of insulation make it a perfect choice for a variety of applications, such as street lighting, HVAC controls and PLCs. Its working principle is simple: when a control signal is applied, the LED inside the SSR will switch on, energising the MOSFET and allowing current to flow from the input to the output. When the control signal is removed, the MOSFET will be de-energised and blocked, preventing any current from flowing.

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