AQW274A

Series:	PhotoMOS™ AQW
Packaging:	Tube
Part Status:	Obsolete
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A) x 2
Output Type:	AC, DC
Voltage - Input:	1.16VDC
Voltage - Load:	0V ~ 400V
Load Current:	300mA
On-State Resistance (Max):	3.2 Ohms
Termination Style:	Gull Wing
Package / Case:	8-SMD (0.300", 7.62mm)
Supplier Device Package:	8-SMD

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Solid State Relays: AQW274A Application Field and Working PrincipleSolid state relays are commonly used in modern electrical systems for their desirable characteristics, such as immunity from electromagnetic interference and mechanical life. Among the popular types of solid state relays is the AQW274A series. This section will discuss the application field and working principle of the AQW274A series. AQW274A Application FieldThe AQW274A is a robust solid state relay optimized for applications where high precision is required. Usually, the AQW274A is found in the following systems: • Industrial temperature control systems• Robotics • Machine tool automation• Sensors• Process controlThis solid state relay is designed to provide reliable operation in the toughest industrial environments. The AQW274A is UL approved and CSA certified for use on electrical systems from 20A up to 4000VAC/DC. Its versatility makes it one of the most widely used solid state relays in the field today. AQW274A Working PrincipleThe AQW274A is a zero-crossing type relay, meaning that it will switch when the voltage is zero. It is designed with both forward- and reverse-biased output, meaning that it can be used to switch either AC or DC with no added circuitry. The AQW274A is made up of two basic components. The first is the input module, which contains the voltage, current, and temperature sensing elements. This inform the device of the present conditions so the relay can respond accordingly. The second component is the output module. This is the part that actually does the switching. It consists of a semiconductor device (usually a MOSFET) arranged so that when voltage is applied, the device switches. When the input voltage is zero, the AQW274A switches its output on or off. This allows the switch to turn on or off in a very short time - as fast as one millisecond or less. When the voltage is removed, the switch turns off again. This makes the AQW274A extremely reliable and safe to use.ConclusionThe AQW274A series of solid state relays offers great value and a number of desirable characteristics. It’s robust construction, versatility, and reliable operation make it a popular choice for industrial applications. Furthermore, its zero-crossing design makes it suitable for both AC and DC switching. Understanding the application field and working principle of the AQW274A is essential for anyone looking to use this model of solid state relay.

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