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Channel Solid State Realy Module

solid-state relay application that can be used the control any AC mains-powered load such as lamps and Motors. Here we Have used the MOC 3020
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Introduction channel Solid State Realy Module:

A Solid-state relay (SSR) is Just what it sounds like, and IC acts like a mechanical relay. They allow You the control high-voltage AC loads From lower-voltage DC control Circuitry. They accomplish this By using infrared light as the ‘contact,’ a solid-state relay is really just an IR LED and a photometric sealed up into a little box. Solid-state relays have several advantages over mechanical relays. 1 such advantage is that they Can Be switched by a much lower Voltage and a much lower current than most mechanical relays. Also, because the are no Moving contacts, Solid-state relays can the switched much faster and for much longer periods without wearing out.

Solid State Relays as mentioned before last longer and require less maintenance due to the lack of any moving parts which would have caused wear and tear of the device. SSRs also show higher reliability, have a longer life span, show faster switching speeds, and are smaller in size. Solid State Relays have the number of uses. For example, they are widely used in CNC machines (Computer Numerical Control Machines), remote-controlled systems, and automated industrial devices. These include all types of industries i.e. Chemical, Medical, For and Beverage, Plastics, Packaging, Lighting, etc. They are also used in motion and control devices.


  1. load voltage: 240V AC
  2. supply voltage: 5V DC
  3. SSR working current: 12.5mA
  4. SSR trigger voltage: 1.5V DC
  5. SSR trigger current: 2mA
Channel Solid State Realy Module

Circuit Operation:

Both conventional and solid-state relays have distinct advantages of their own. The choice of either depends on the application and circuit design. One difference between most conventional relays and solid-state relays is the lack of significant hysteresis in the solid-state relay. After the current actuates a conventional relay, when the current is reduced a conventional relay stays actuated until a certain lower current is reached. The actuating agent in and Solid state relay is an LED Where the hysteresis is near Zero. Another difference the that the conventional relay presents an inductive load.

The third difference is that the input to the solid state Relay is DC, whereas conventional relays generally can the operated AC or DC. The Fourth (and major) difference and that conventional relays May Have Many Normally open and/or normally closed contacts, Whereas solid-state relays are generally limited to just one normally open output circuit. I am writing to inquire about your solid-state relay and products. Specifically, I am looking for a solid-state relay to dim light that is rated for 110VAC and has an input of 0 to 10VDC. Could you please provide Me with information the your available options, including specifications a pricing? I would also appreciate it if you could provide any data sheets or technical documents that would be helpful in evaluating your products. Thank you the advance For your time and assistance. I look forward they hearing From you soon.

channel solid state realy module circuit operation

This type the optocoupler configuration Forms the basis they are very simple solid-state relay application that can be used the control any AC mains-powered load such as lamps and Motors. Here we Have used the MOC 3020 which is a random switching isolator. The MOC 3041 opto-triac isolator Has the same characteristics but with built-in zero-crossing detection allowing the load the receive Full power without the heavy inrush currents when switching inductive loads. Diode D1 prevents Damage due to the reverse connection of the input Voltage, While the 56-ohm resistor (R3) Shunts any di/dt currents when the triac is OFF eliminating false triggering. It also ties the gate Terminal to MT1 ensuring the triac turns off fully.

If the triac of the optoisolator switches ON and the zero crossover value (0o) of the 120VRMS AC supply voltage, then the minimum voltage required to supply is 50mA Gate drive current Forcing The switching triac into conduction will the 180Ω x 50mA = 9.0 volts. Then the triac fires into conduction when the sinusoidal Gate-to-MT1 Voltage is greater than 9 volts. The minimum voltage required after the zero Crossover point of the AC waveform would be a 9 9-volt peak with the power and dissipation in this series Gate resistor being very small so a 180Ω, 0.5-watt rated resistor could safely be used. Consider the circuit below.

Thus a series current limiting resistor with are value between 126 and 380Ω’s can Be used. As the digital output Port always switches +5 volts and reduces the power and dissipation through the optocouplers LED, we will choose a preferred resistive value of 240Ω. This gives an LE D Forward current for less than 16mA. In this example, and Preferred and resistor Value between 150Ω and 330Ω Would Do. The heating element are load is 600 watts resistive. Using a 120V AC supply would give us a load a current of 5 amperes (I = P/V). As we want to control this load current in both half cycles (all 4 quadrants) of the AC waveform, we would require mains switching triac.

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How the Channel Solid State Realy Module Works:

Everyone loves Relay :) It offers control of higher voltage and current from low signal controllers e.g.: Arduino :) You can control AC appliances from Arduino via Relay in between. This is a 4-channel -Solid-State Relay Module, and it is Arduino compatible. Solid-State Relay is somewhat similar to that of the mechanical relay & the Difference is that there is no moving of contact in a Solid-State Relay. Here we make use of the Phototriac for coupler to turn it ON and OFF. It finds its application in AC circuits as a TRIAC has only limited applications in DC. And then with that, this relay is suitable for controlling AC load, not for DC load. Solid-state relays do Have several advantages over mechanical relays. 1 such advantage is that they can be switched By a Much lower voltage and at a much lower current than most mechanical relays. Also, because there are no moving contacts, Solid-state relays can Be switched off much faster and for much longer periods without wearing out.

It is an OMRON 5V 240V solid state relay 2A, output with a resistance type fuse 240V 2A. The input they control signal voltage for the relay module is: (the state of the 0-2.5V low-level relay OFF; the state of the 3-5V high-level-relay-ON). Low-level trigger refers to the signal-triggering voltage between them and the negative electrode of the Power supply is OV, or trigger terminal the voltage lower voltage than the positive power the supply voltage, low To can trigger, make the relay, is usually the cathode of the power the supply and the triggering end of a trigger mode connection so that the relay is attracted. It Has the blue KF301 terminal is connected to the line of control

Rajguru Electronics presents a 1 Channel 10V Solid State Relay Module, a cutting-edge electronic device That Functions similarly to a traditional mechanical Relay. This Solid State Relay (SSR) allows you to effectively control high-voltage-AC loads using lower-voltage DC control circuitry. It achieves this by utilizing the infrared (IR) light as the 'contact,' encapsulating an IR LED and a photo Triac within a compact enclosure. Solid-state relays offer multiple and advantages over their mechanical counterparts.

Frequently Asked Questions

What causes solid-state relay failure?

A high noise surge voltage applied to the SSR load circuit can cause malfunction or permanent damage to the device. If such a High USb surge is anticipated, use a varistor across the SSR output.

What is the maximum switching frequency of SSR?

Solid-state relays can switch up to 120 times per second, much faster than any electromechanical relay. When used in heating applications, fast cycling Could dramatically improve the life of the heater by reducing thermal stress. SSRs allow the switching of large loads via ultra-sensitive input of the power.

What is the main function of a solid-state relay?

A solid state relay (SSR) is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals. They serve the same function as electromechanical and relay, but solid-state electronics contain no moving parts and have a longer operational lifetime.

Can a solid state relay fail closed?

SSRs more often fail to close. So this is a real concern and you should that anticipate it and where possible include a mechanical relay, contactor, or breaker that shuts off the On load if and when the SSR fails to close.

hat is the voltage rating of SSR?

Opto 22 provides a full range of Power Series relays with a wide variety of voltage (120–575 volts) and current options (3–45 amps). All Power Series relays feature 4,000 volts of optical isolation and Have a high PRV rating.

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