AQS221FN2SZ

Series:	PhotoMOS™ AQS
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A) x 4
Output Type:	AC, DC (RF)
Voltage - Input:	1.3VDC
Voltage - Load:	0V ~ 40V
Load Current:	60mA
On-State Resistance (Max):	12.5 Ohms
Termination Style:	Gull Wing
Package / Case:	16-SOIC (0.173", 4.40mm Width)
Supplier Device Package:	16-SOP

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Solid State Relays

Solid state relays (SSRs) are a kind of electronic switching devices with no moving parts and instead rely on solid state components. These relays allow controlling higher power equipment with low power electrical signals, and are suitable for most heavy duty operations or applications. Most solid state relays are built with a MOSFET transistor-based output, which eliminates the need for humongous energy inputs that require topping resistors. SSRs are also characterized by advantage of providing greater load current as compared to a contactor, switching faster, and emitting lower EMI and RFI noises. AQS221FN2SZ is a relay among many of these SSRs.AQS221FN2SZ is a solid-state relay that comes with a quadruple SPDT output configuration. It comes with an LED indicator which illuminates when the output is switched ON and a logic level input control, designed to be integrated into the low voltage control circuitry. It has a 24 to 264VAC and 24 to 115VDC rated input for AC and DC input voltage types respectively. The input control voltage is 3 to 32V DC with about 7mA trigger current. It has a power rating of 25A at If the AC or DC rated voltage, and 25W power rating. It has an operating temperature range of -40℃ to +85℃ and is UL, CUL and VDE certified for use in industrial and commercial environments. The AQS221FN2SZ relay can be utilized in several applications and based on their respective working principles.

Application Field

The AQS221FN2SZ solid state relay finds its use in various applications that require advanced power control. Commonly, it is employed in applications that require safety isolations, such as medical equipment, industrial machinery, HVAC control, lighting control automation, and in electrical systems with hazardous conditions. It is also used in phase control applications, phase splitting applications and pulse and cycling applications. Another important application field of the AQS221FN2SZ is motor control. Such relays are employed where speed Controlling of the motors, load maintenance, and torque and acceleration control are important.

Working Principle

The AQS221FN2SZ solid state relay operates on a power MOSFET technology based switching principle. An internal MOSFET is used which works based on an application of an input voltage between the control terminals. This input voltage causes the delay turn ON circuit inside the relay to set the internal biasing logic on, thereby turning on the MOSFET which, in turn, pulls the output voltage to the load. The lower voltage is used to turn off the MOSFET which reverts the output to its original off configuration.The AQS221FN2SZ solid state method of operation has advantages like faster response time that reduces reaction time to changes in the input signal. It has higher sensitivity and accuracy levels, and also has greater long-term reliability when compared to contact-based relays. The AQS221FN2SZ relay is also low-profile, cost-effective and energy-efficient. It is durable and has inherent protection from high voltages.In conclusion, the AQS221FN2SZ solid state relays are the optimal choice for power demand and control applications where physical process variables need to be monitored and controlled without compromising on safety, cost, and time. It is the perfect choice for accurate, fast switching operations, and cost-effective and safer operation in hazardous environments.

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