G3VM-21LR

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Solid State Relays (SSRs) are one of the most reliable components used in switching circuit applications today. In the control circuit, ssrs act as an electronic link between two separate circuits. Field-effect transistors (FETs), insulated gate bipolar transistors (IGBTs), Triacs, and opto-isolators are the most commonly used SSRs. This article focuses on the G3VM-21LR SSR and its application field and working principle.

G3VM-21LR is a SSR switch made from gallium nitride-on-silicon FET (GaN-on-Si FET). It is designed to be used in circuit protection for low voltage, high current applications. It features 350V static Operation voltage range, 5A load current, 5V Control voltage, and 3000 Vrms insulation voltage. It also contains built-in overvoltage protection (OVP) which prevents damage from over currents in the circuit. Therefore, the G3VM-21LR SSR is suitable for applications such as motor control, AC power control, and industrial process control.

The structure of the G3VM-21LR SSR consists of a pair of FETs, one N-channel and one P-channel MOSFET. The N-channel FET acts as the main switch for the circuit, while the P-channel FET performs the same function of opening and closing the circuit. With the aid of the control voltage, the two FETs are mutually controlled and switched on and off to control the load current.

In terms of its operation, the G3VM-21LR SSR has two separate states: ON and OFF. When the control voltage is applied, the SSR is in the ON state and the switch is closed, allowing current to flow through the circuit. When the control voltage is removed, the SSR is in the OFF state and the switch is open, preventing current flow. Therefore, the G3VM-21LR SSR can be used to switch load currents quickly, reliably and efficiently.

Additionally, the G3VM-21LR also contains built-in protection features such as overvoltage protection (OVP) and short circuit protection (SCP). The OVP is designed to prevent load current exceeding the reliable operating conditions. It will turn off the SSR if the voltage exceeds a certain threshold. The SCP is designed to prevent damage to the SSR from excessive current flow. It will turn off the SSR if the current exceeds a certain limit.

To sum up, the G3VM-21LR SSR is a reliable and efficient Solid State Relay designed for low voltage, high current applications. It features a pair of FETs, OVP and SCP, allowing for fast and reliable switching of the load current. Therefore, it is suitable for applications such as motor control, AC power control, and industrial process control.

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