G3VM-61UR(TR05) Relays

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The G3VM-61UR (TR05) is an example of a Solid State Relay (SSR). An SSR is a device that allows a small amount of current to turn on an internal switch. A small current is switched on and off internally by a semiconductor and/or optical device, without any direct electrical connection to the load. SSRs are used to switch and control varying electrical loads, including pumps, fans, motors, solenoids, lights and household appliances. SSRs are popular in many industries, including automotive, telecommunications, computers, lighting, factory automation and production lines.

The G3VM-61UR is a two-terminal, zero-crossing, AC/DC operated solid-state relay with control panel switching for up to 10A 250 V AC, 10A 30 V DC or 6A 100 V DC loads. It is available with various universal inputs of AC/DC 3–12 V, 24–48 V, or 85–132 V. The G3VM-61UR is designed to be mounted directly on the printed circuit board. It has a built-in diode which helps suppress power surge or reverse connection. It has a high switching capacity and it is highly reliable for its 21,000-hour minimum life expectancy.

The input of the G3VM-61UR is the control part or the input section. It consists of an LED and a photocoupler. An LED has two leads, the anode (+) and the cathode (-). When a voltage is applied between the anode and the cathode, current flows and the LED will turn on and illuminate. This current will also activate the photocoupler—a semiconductor device that uses light to transfer information. The photocoupler consists of an LED and a phototransistor, which are connected but the LED and the phototransistor are electrically isolated.

The output of the G3VM-61UR is the power part or the output section. It consists of an optically coupler and a thyristor or a triac. The optically coupler increases the voltage and current level that will flow to the thyristor or triac. A thyristor is a solid-state semiconductor device that is used to switch large currents and voltages. It consists of a gate electrode and two other electrodes. When the gate electrode is triggered a current will flow between the two other electrodes, and the thyristor will turn on. The thyristor is capable of controlling AC current of up to 10A 250 V AC. A triac is similar to a thyristor but it is capable of controlling current in both directions.

When a voltage is applied to the G3VM-61UR, the LED will illuminate and activate the photocoupler, triggering the thyristor or triac. The thyristor or triac will then control the current and switch it on or off. The G3VM-61UR is used to control AC/DC current of up to 10A 250 V AC, 10A 30 V DC or 6A 100 V DC loads without any direct electrical connection to the load. It is a robust, reliable and cost-effective solution for switching and controlling electrical loads.

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