LBA120 Relays

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A Solid State Relay (SSR) is an electronic switching device commonly used in industrial and commercial applications to switch electrical power in an automated fashion from one circuit to another. The LBA120 is a solid state relay manufactured by AutomationDirect. It is an industrial-grade, 2-pole, four-throw SSR using optically isolated MOSFET technology and is designed for Hz loads and periodic switching. This article will discuss the application field and working principle of the LBA120.

The LBA120 SSR is ideal for various applications due to its wide range of operating voltage and current capacity. It is capable of operating at up to 240VAC or 120VDC, with a load capacity of up to 10A. It also features a wide range of control voltage range from 12-24VAC/DC. This makes the LBA120 well suited for a variety of industrial and commercial applications, including motor control, conveyor control, lighting control, and process control. Its current rating allows it to be used for powering larger motors, such as those used in HVAC systems, pumps, and compressors.

The working principle of the LBA120 is based on a light-dependent resistor (LDR) which is used to control the switching of the MOSFET switch. The LDR is an optically isolated device that utilizes a change in impedance to detect the presence of light. The LDR is connected in series with the MOSFET switch, and the resulting voltage drop is used to control the switching of the MOSFET. When a light is detected by the LDR, the current in the MOSFET is reduced, turning the switch off and changing the state of the output circuit.

When voltage is applied to the control circuit of the LBA120, the LDR is illuminated and the MOSFET switch is turned on. When the LDR detects no light, the MOSFET is turned off and the output circuit is changed. This process allows for the easy and convenient control of the output circuit. The LBA120 also features a dry contact output, which means that the output circuit can be isolated from the power source, allowing for the connection of a variety of devices.

The LBA120 is a highly reliable, industrial-grade, optically isolated MOSFET switch. It is well suited for a variety of industrial and commercial applications, and is capable of handling large loads and periodic switching. Its light-dependent resistor and dry contact outputs make the LBA120 an ideal choice for motor control, lighting control, and other automated applications.

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