G3VM-21UR11(TR05) Relays

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Solid State Relays

A solid state relay (SSR) is a type of electronic switch that controls the flow of electricity. It is designed to switch on or off when triggered by an external electrical signal, and can be used to control electrical appliances, motors, fans, pumps, and other devices. The G3VM-21UR11(TR05) is a solid state relay specifically designed for low voltage DC control applications.

G3VM-21UR11(TR05) Features

The G3VM-21UR11(TR05) is a surface mount type, non-polarized, 2-channel SSR, offering built-in resistive fusing and isolation of up to 1,600VAC L-L. It has a maximum operating voltage of 12V DC, and an on-state current of 0.25A (control) and 21A (load). The input impedance of the G3VM-21UR11(TR05) is low, allowing a much lower off-state current than other types of relays suitable for low power control. Its switching speed is also fast, with a response time as short as 0.1ms.

G3VM-21UR11(TR05) Application Field

The G3VM-21UR11(TR05) is typically used in low voltage DC control applications such as control of motors, lights, and other electric/electronic equipment. Some examples of applications would include LED lighting, solar panel systems, temperature and humidity control systems, security systems, process control systems, and industrial automation equipment.

G3VM-21UR11(TR05) Working Principle

The G3VM-21UR11(TR05) works on the principle of a thyristor, an electronic device that is basically two diodes back-to-back. When the voltage at its gate is raised above the threshold voltage, a current will flow through the device thus turning it "on". The G3VM-21UR11(TR05) then becomes electrically isolated and a controlling signal can be applied. When the voltage at the gate is again lowered below the threshold voltage, the device "turns off" – and the device is no longer electrically isolated.

In a practical application the G3VM-21UR11(TR05) would be connected between the power source and the load. The controlling voltage/signal, usually a 5V DC, is then applied to the gate of the SSR and when the signal is switched "on" the current flows through it, forming an electrically isolated bridge between the power source and the load. When the signal is switched "off" the current flow is stopped, but the power is still applied to the load.

Conclusion

The G3VM-21UR11(TR05) is a solid state relay specifically designed for low voltage DC control applications. Due to its low input impedance, fast switching speed, and 1,600VAC L-L isolation, the G3VM-21UR11(TR05) is well-suited for applications requiring low power control such as LED lighting, process control systems, and industrial automation systems. It works on the principle of a thyristor, which is an electronic device that is activated when the voltage at the gate is raised above the threshold voltage.

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