What are Solid State Relay and its uses? | What are its advantages?

 A Solid-state relay is an electronic device that switches on or off when a small external voltage is applied across its control terminals. They are semiconductor equivalents of the electromechanical relay and can control electrical loads without moving parts. For example, it controls the AC power for ON/OFF switching, motor speed control, light dimming, or other such applications power control is needed. Using a solid-state relay, These AC loads can be easily controlled with a low current DC voltage, providing long life and high switching speeds. 

The life expectancy of Solid State Relay is over 100 million operations. It is widely used in heating control, Motor control, capacitor switching and lighting control, solenoid, transformer control, and air conditioning applications. In addition, this electronic switching device is used for external voltage (AC or DC) for controlling terminals. While serving the same functions as an electromechanical relay, expect moving parts. SSR differs from a general relay, does not contain any mechanical contacts, and mostly uses electronic parts. Thus, Solid State Relays have wide features. 

It ranges from 12A to 125A. Single-phase and three-phase SSRs are available with low-level output control without interfacing. Its narrow SSR range has current monitoring & temperature controller PID with high switching frequency and longer life. Solid relay has a compact size that has input voltage 3 to 32VDC.

Advantages of SSRs

• Long Life Expectancy and High Reliability - It has no mechanical parts, solid-state device completes the contact function. Also, there are no moving parts and can operate in high vibration and shock environments. The components of solid-state relays determine longevity and high reliability due to their unique characteristics.

• Low Control Power, High Sensitivity, Good Electromagnetic Compatibility - Low driving power and a wide input voltage range. It is compatible with most logic integrated circuits without additional buffers or drivers.

 

• Fast Transitions: Solid-state relays use solid-state devices, allowing switching speed from milliseconds to microseconds.

 

• Low electromagnetic Interference: It has no input "coil" and no rebound and ignition arc, which reduces electromagnetic interference. In addition, most AC output solid-state relays are zero voltage switches that turn on at zero voltage and turn off at zero current, reducing transient switching effects and sudden interruptions in the current waveform.

BCH India is one of India's leading manufacture and supplier of Solid State Relay. Our relays are more durable and reliable than others. Click to know more.