AQY221N3M1Y

Series:	PhotoMOS™ AQY
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC, DC (RF)
Voltage - Input:	1.14VDC
Voltage - Load:	0V ~ 25V
Load Current:	150mA
On-State Resistance (Max):	7.5 Ohms
Termination Style:	SMD (SMT) Tab
Package / Case:	4-SMD (0.116", 2.95mm)
Supplier Device Package:	4-SON

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Solid State Relays: AQY221N3M1Y Application Field and Working Principle

Solid state relays (SSRs) are electronic switches that interface an electronic control circuit to an electomechanical load. This type of relay is used to switch AC and DC signals, allowing control circuits to control much higher voltage and current applications. A relay generates an output signal when an input signal is applied to it, thus making it an ideal choice for applications where a computer or automated process requires control of a higher voltage/current application. In addition, SSRs are reliable and operate with high switching speeds, allowing for fast response times.The AQY221N3M1Y is a compact, single-pole 4-pin PCB SSR with an input voltage of 4-32 VDC and output voltage of 24-280 VAC/30VDC. It features a zero crossing function and optical isolation to guard against noise interference. It is suitable for a wide range of applications including lighting, air conditioning and home appliance control, as well as process and motor control.The AQY221N3M1Y is a highly versatile SSR designed for applications in which an input signal needs to switch a high voltage load, such as motors or fluorescent lamps. It features a zero-crossing (ZC) function, a silicon radio photosensitive triac as the reference circuit, and optical isolation to protect against interference or failure caused by AC power interference.The AQY221N3M1Y operates by providing full-wave current rectification protection when the input voltage is not sufficient to power the load. This protection means that the device does not draw input power when the input voltage is below the rated voltage (4V). When the input voltage is within the specified range (4-32V), the AQY221N3M1Y will switch the output relay without drawing input power. When the input voltage drops, the AQY221N3M1Y will still switch the output relay without drawing input power, thus offering a reliable and consistent performance.The AQY221N3M1Y features zero-crossing (ZC) technology to protect against current surge and fire. ZC technology allows the AQY221N3M1Y to detect changes in the voltage waveform and switch the load instantly, timing the switching to the zero-crossing point of the voltage waveform, thus preventing arcing and fire and providing a close approximation to a DC switching application.In conclusion, the AQY221N3M1Y is a reliable, compact, single-pole 4-pin PCB SSR providing an efficient way to switch AC and DC signals. Its ZC technology and optical isolation protects against noise interference and provides reliable performance. It is versatile enough to be used in a range of applications, making it a popular choice for various industry sectors.

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