AQH3213AZ

Series:	AQ-H
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC, Zero Cross
Voltage - Input:	1.21VDC
Voltage - Load:	0V ~ 600V
Load Current:	1.2A
Termination Style:	Gull Wing
Package / Case:	8-SMD (0.300", 7.62mm), 7 Leads
Supplier Device Package:	8-SMD

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AQH3213AZ Solid State Relays

Solid state relays (SSRs) are designed to switch electrical circuits in which the load current and/or voltage exceeds the limits of a standard mechanical relay. AQH3213AZ is an example of an industrial SSR, which is designed for controlling high-current or high-voltage applications. This article will discuss the application field and working principle of the AQH3213AZ SSR.

Application Field

AQH3213AZ is a type of SSR which is specially designed to control high-current or high-voltage applications. It is suitable for applications such as industrial motors, electric heating systems, lighting systems, electrical ovens, HVAC systems, power supplies, and machine tools. It can handle load current up to 16A, and is designed to switch DC voltages up to 800V.

Working Principle

The working principle of AQH3213AZ SSR is a form of contactless switching. It features two opto couplers (optoisolators) which are used to transfer the control signal between the control (input) and the load (output) side. On the input side, an LED is used to transfer the control signal to the opto couplers. On the load side of the SSR, a thyristor is used to switch the AC or DC load current. When a control signal is applied to the LED on the input side, the light will be emitted. This will cause the opto coupler (optoisolator) on the load side to switch on, triggering the thyristor to conduct. This will in turn allow the load current to flow from the input side to the output side of the SSR. The control signal from the LED is isolated from the load side, ensuring that the control side is not exposed to the high current or high voltage. When the control signal is removed, the LED will turn off and the opto coupler on the load side will switch off, triggering the thyristor to switch off. This will interrupt the flow of the load current and the SSR will then go into an OFF state.

Conclusion

AQH3213AZ is an industrial type of solid state relay which is designed to switch high-current or high-voltage applications. It features two opto couplers which are used to transfer the control signal from the input side to the load side. The control signal is isolated from the load side, ensuring that there is no exposure to high current or high voltage. When the control signal is applied, the signal is transferred to the load side which triggers the thyristor to switch on and the load current will flow from the input side to the output side. When the control signal is removed, the thyristor will switch off and the SSR goes into an OFF state.

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