G3VM-21AR

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Solid State Relays (SSRs) are electrical relays that use semiconductor switching elements, such as transistors or thyristors, instead of mechanical contacts for electrical switching. The G3VM-21AR is a 20A rated solid state relay module manufactured by Omron, a Japanese engineering firm. It is designed to switch signal input mains voltage (AC) output. This useful device is widely used in automation, control, process, and power management systems.

Application Field

The G3VM-21AR is a compact 40mm x 32mm x 35mm module that can be easily mounted to a wide variety of surfaces. It has a wide range of AC input terminal options, making it suitable for a mix of markets. Some of these include lighting control, electrical appliances, automotive accessories, consumer electronics, pumps, motors, industrial machinery, and instrumentation.

Working Principle

Like other SSRs, the G3VM-21AR works by using an insulated gate bipolar transistor (IGBT) to switch the AC load with no contact relay. When a control signal is applied to the device, the gate voltage turns “ON” the IGBT, allowing current flow. As in the fundamentals of all SSRs, when the load current reaches a certain level, the transistor turns off, preventing further current flow. To maintain the “ON” state, the controller continuously sends current signals.

Additional Features

The G3VM-21AR includes several features that make it a desirable choice for many applications. These features include an internal heat sink, magnetic noise filter, surge suppression, and self-diagnosis functions. The self-diagnosis functions monitor the relay performance and provide a warning before the IGBT fails. The internal heat sink helps to dissipate heat and extend the life of the device.

Conclusion

The G3VM-21AR solid state relay from Omron is a highly reliable device that is suitable for a wide range of applications. It features advanced features such as an internal heat sink, magnetic noise filter, surge suppression, and self-diagnosis functions. Furthermore, its wide range of AC input terminal options, makes it a versatile little device.

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