AC SSR Relay AC SSR of Horizontal Type Double LED Indicator

Description of AC Single Phase SSR Solid State Relay

Solid State Relay Input
One of the main components of a solid state relay (SSR) is an opto-isolator (also called an optocoupler) which contains one (or more) infra-red light-emitting diode, or LED light source, and a photo sensitive device within a single case. The opto-isolator isolates the input from the output.

The LED light source is connected to the SSR’s input drive section and provides optical coupling through a gap to an adjacent photo sensitive transistor, darlington pair or triac. When a current passes through the LED, it illuminates and its light is focused across the gap to a photo-transistor/photo-triac.

Thus the output of an opto-coupled SSR is turned “ON” by energising this LED, usually with low-voltage signal. As the only connection between the input and output is a beam of light, high voltage isolation (usually several thousand volts) is achieved by means of this internal opto-isolation.

Not only does the opto-isolator provide a higher degree of input/output isolation, it can also transmit dc and low-frequency signals. Also, the LED and photo-sensitive device could be totally separate from each other and optically coupled by means of an optical fibre.

The input circuitry of an SSR may consist of just a single current limiting resistor in series with the LED of the opto-isolator, or of a more complex circuit with rectification, current regulation, reverse polarity protection, filtering, etc.

To activate or turn “ON” a sold state relay into conduction, a voltage greater than its minimum value (usually 3 volts DC) must be applied to its input terminals (equivalent to the electro-mechanical relay coil). This DC signal may be derived from a mechanical switch, a logic gate or micro-controller, as shown.

Specification of AC Single Phase SSR Solid State Relay

AC SSR Relay AC SSR of Horizontal Type Double LED Indicator

AC SSR of Horizontal Type Double LED Indicator

Our Company

Founded in 1992, Wuxi Gold Control Technology Co., Ltd., a private high tech company, is specialized in the research and production of Solid State Relays, Electronic Semiconductors, DC Motor Drivers and AC Voltage Regulation Devices.

For the past 10 consecutive years, our company has been qualified as "Jiangsu's private high tech business". We have also been given the honor as "Wuxi's 10 Best Private Science & Technology Enterprises" for years.

Our products, the electronic modules with the brand of Gold, have been listed among "Wuxi's Renowned Products".Our company has 5 patents on Solid State Relays. Our products are widely used in various industrial automation control areas like chemical fiber machinery, temperature control of electric furnace, rubber & plastic machinery, fountain control and digital-controlled machinery, and are sold to Europe, America, Korea and Turkey.

Our Factory

Our factory can produce about 50,000 pieces each month. We can give you good quality and reasonable prices. We have 20 professional research people who have all been graduated from famous universities and colleges. When producing, we have strict tests: self-test, inter-test and special-test.

Our Certificate

Our products, the electronic modules with the brand of Gold, have been listed among "Wuxi's Renowned Products".Our company has 5 patents on Solid State Relays. Our products are widely used in various industrial automation control areas like chemical fiber machinery, temperature control of electric furnace, rubber & plastic machinery, fountain control and digital-controlled machinery, and are sold to Europe, America, Korea and Turkey.

Our company passed the Certification of ISO9001:2000 in 2000. Our main products have been given CE Certificate of European Union, UL,CUL and RoHS Certificates.