MOC3020 ISOLATED TRIAC CONTROL CIRCUIT: This circuit, designed for controlling high-powered devices utilizing components like Triac (btb08-600) and PIC, CMOS, TTL, etc., features a solid-state relay SSR structure. It can effectively manage devices such as insulated motors and lamps through the use of MOC3020 photo Triac drive. The unit supports control voltages ranging from 3V to 30V DC and 115V to 280V AC, providing a power output of 400W (without modifications and with coolant). Additionally, it operates efficiently with a minimum current requirement of 50 to 100mA.
Solid State Relay Circuit Diagram:
WHAT IS SSR SOLID STATE RELAY?
Summary information without going into much detail; For the SSR ( Solid State Relay ), the mechanical contactless electronic switch can be called an electronic relay. Control low current with CMOS, TTL, ETC. can be done. Triac, thyristor, Mosfet, igbt can be used for power control. For insulation, Optoisolator is usually used as Opto Coupler. For information about the Opto Coupler, see: What is Opto Coupler? How does it work? What is Triac in addition to varieties, What is thyristor?
SSR Solid state relays are increasingly being used because of their advantages, because the SSR does not have corrosion, no mechanical parts that are subject to wear, contact spark, etc. For example, The 8-legged DIP integrated sheath has low-power SSR relays.
The control voltage is in a wide range. High galvanic isolation between the control circuit and the load is low in noise ratio. Solid-state relays have fast switching speeds compared to electromechanical relays.
The SSR Solid State Relay has many advantages but disadvantages. When closed, there is higher resistance (generating heat) and electrical noise. The voltage-current characteristic is non-linear (not fully resistant ), which in some way disrupts switching waveforms. Some SSR designs require a connection compatible with polarity. Electromechanical relays are not affected by polarity.