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Solid, solid state relay

Edit: Global Link Electronic (Shenzhen) Co.,Ltd    Date: Aug 13, 2015
source:

Solid state relays (SSR) compared with electromechanical relays, is a kind of mechanical motion, the relay that contains no moving parts, but it has the function of electromechanical relays is essentially the same. SSR is a made up entirely of solid state electronic components of the switch element, he used electronic components, magnetic, and optical properties to perform reliable isolation of the input and output, high power transistor, Power FET, single thyristor and TRIAC switching characteristics of the device to achieve the non-contact, no spark to connect and disconnect the control circuit.

Solid, solid state relay consists of three parts: the input circuit to isolate (coupled) and output circuit. Different types of the input voltage, input circuit can be divided into the DC input circuit, AC input circuit and AC and DC input circuit of three. Control circuit also has some input is compatible with TTL/CMOS, positive and negative logic control and anti-equivalent functionality. Solid state relay input and output circuits of isolation and coupled, opto-coupled and transformer coupling two kinds. Solid state relay output circuit can also be divided into direct current of output circuit, AC circuits and AC/DC output circuit and other forms. AC output, often use the two thyristor or TRIAC, DC output bipolar devices or power field-effect transistor can be used.

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