Optoisolators - Triac, SCR Output are semiconductor devices that allow bi-directional or uni-directional control of an AC source and provide isolation between the control and load circuits. Isolation is crucial for electrical appliances as they accidentally avoid or prevent dangerous faults when higher voltages are coupled to the low-voltage circuit. They combine the functionality of an Opto-Triac or an Opto-SCR with a power Triac.
These photocouplers provide electrical isolation between a low voltage input and a high voltage output while being capable of switching the high voltage output. In addition, they are widely used for a discrete power Triac logic system on equipment, including industrial controls, solenoids, motors, solid-state relays, and consumer equipment.
How to choose these products?
They are selected based on turn-on time, on-state current, and forward voltage.
What are the alternative names for Triac and SCR?
They are also called photocouplers, optical couplers, and optocouplers.
The difference between SCR and Triac:
An SCR (Silicon Controlled Rectifier) is similar to a Triac; however, the main difference between SCR and Triac (Triode for Alternating Current) is that SCR is a uni-directional while Triac is a bi-directional semiconductor device.
Advantages of Optoisolators - Triac, SCR Output:
These semiconductor devices feature multiple benefits. For example, Triac can be triggered with gate pulses of positive or negative polarity and requires a single heatsink of a slightly larger size. In the case of SCR, two smaller size heatsinks and a single fuse for protection are essential.
Applications of Optoisolators - Triac, SCR Output:
These devices are commonly used anywhere in situations, specifically in a switching application needed to protect and electrically isolate two circuits. They are used in applications, including:
- Lamps
- Fans
- Motors
- High Voltage Ac Switching
- Gas Pumps
- Light Controls
- Temperature Controls
- AC Motor Starters
- Washing Machines
- Microwave Ovens
- Water Heaters
- Solenoid or Valve Controls
- Static Power Switch
- EM Contactors
- AC Motor Drivers.
