A solid state relay (SSR) or solid state contactor is an electronic switching device that uses an electronic component switching element instead of an electromechanical contact to make or break the connection in the load circuit.
Our solid state relays have several features that distinguish them from other switching devices:
SSRs (solid state relays) are designed to control high-power AC electrical loads with a low-voltage input signal.
These electronic components enable AC or DC electrical current to be switched without mechanical movement.
They are generally used in systems where PLCs or microcontrollers cannot provide the required power management capability.
It is a competitive product category to electromechanical relays and other switching methods.
There are two SSR technologies:
The basic internal structure of an SSR consists of several main components:
The input interface, used to optically isolate the circuit from the output of the input.
A control section acts as an optical isolator. It often consists of one or two light-emitting diodes (LEDs) for emission. For receiving, one or more photosensitive elements such as photodiodes or phototransistors are used. These elements close the circuit and allow current to flow to the load.
A power part with a switching element, usually a thyristor such as a TRIAC, an SCR, a GTO thyristor, but FETs and triacs are also used to switch the loads.
Solid state relay operation uses solid state devices such as transistors, thyristors or MOSFETs instead of electromechanical devices such as relays to switch high power resistive or inductive loads.
SSRs are controlled by a small external voltage applied to their control terminals. This signal can be an AC or DC voltage. A low power circuit can be used to switch the controls of AC or DC supplies to a high power load.
A temperature controller PXE or a PID PXF controller provides voltage and DC control of the solid-state contactor to regulate the temperature. The temperature controller is responsible for switching the SSR on and off in response to temperature changes. To control the SSR correctly, the temperature controller must be correctly selected. Otherwise, the SSR may fail to switch on or off at the correct temperature, which can damage sensitive equipment or present a safety hazard. In addition, temperature controller must be able to handle the current required by the solid-state relay.
You can use this component to switch AC or DC loads from a low voltage or current. The solid-state relay, often considered the modern equivalent of the mechanical contactor, offers many advantages. It is particularly useful where protection against overvoltage is crucial. This device offers control without moving contacts, reducing the risk of wear and maintenance. Thanks to its contactless function, it is ideal for circuits requiring silent, spark-free switching.
Another key advantage is its ability to handle multi-phase loads, making it suitable for a wide range of industrial applications. The solid-state relay is easy to connect, usually with screws or wires, and can be fitted with a heatsink to manage heat dissipation. In special cases, where fast, precise control is required, solid-state relays offer reliable, consistent results. In terms of selection, there are many options available on our product page to meet your specific current and voltage requirements.
Finally, this type of solid-state contactor is frequently recommended in technical applications for its robustness and ability to provide optimum protection in a variety of control circuits.
Solid state relays are commonly used in industrial processes and machine automation. One reason for this is their ability to switch high voltages and currents, as well as their resistance to shock and vibration. This makes them ideal for environments with a lot of movement or harsh conditions.
These products can also be used in processes where precision is important, such as in medical equipment or data acquisition systems. In addition, they are often used in areas where space is limited. As a result, solid-state relays have a wide range of applications, including :
Solid state relays (SSRs) have several advantages over electromechanical relays (EMRs). Here are some of the advantages that make SSRs more attractive than EMRs:
For all these reasons, solid-state relays are the preferred choice in many applications where reliability and precision are essential.
For these reasons, solid state relays are the preferred choice in many applications where reliability and accuracy are essential. Among the disadvantages of these products is their higher price. However, this disadvantage is often offset by the many advantages of SSRs.
Long service life
High-speed switching
Heavy-duty
The first thing you need to know when selecting your solid state relays is to check the type of input and output:
Then there are other important technical features to consider:
You should also check the maximum dimensions (length x width x height), output noise and protection features. And don't forget the contact resistance!
Solid state relay - PT3000S din rail - 1 phase
ref : PT3000SFrom
99,00 € Discover
ref : REVOS
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