MOC3033SVM

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

MOC3033 is an optically isolated triac, SCR output optoisolator. It has a Gallium Arsenide (GaAs) infrared emitter diode coupled with an integrated zero-crossing detector circuit for digital logic switching. It offers an electrical isolation barrier between input and output circuits, which protects both devices from electrical shock and interference. This is especially important in applications where AC power is involved. The MOC3033 is an ideal device for switching of AC input signals in a wide variety of industrial automation and process control applications.

The MOC3033 is used to interface electrical circuits to one another to provide isolation, circuit protection, and signal transmission between load circuits and control signals. It has a number of applications in process automation systems, including motor controls, machine controls, watt-hour meters, computer and telecommunications equipment, switching circuits, instrumentation and other digital applications. MOC3033 can be used to control the AC load circuit in a variety of industrial systems, including AC motor power control, lamp dimming circuits, switching power supplies and watt-hour meters.

The working principle of MOC3033 is called zero-crossing detection. It detects the transition where the voltage crosses through the zero threshold from positive to negative voltage. This transition serves as a reference point in the AC power cycle. When the transition occurs, the MOC3033 optoisolator sends out a current pulse to activate the triac gate. This pulse then turns on the load, allowing the conduction between the main and load circuits.

In addition, the MOC3033 incorporates response failure protection: Undervoltage Shutdown feature (UVS). When the control input voltage falls below 13V, the output is automatically disabled and the triac is brought to the cut-off state. An internal blanking time prevents multiple pulses from being generated. This time is usually very brief – approximately one AC cycle. The MOC3033 is sensitive to an external light modulated between 0.8 and 1.2ms.

The MOC3033 optoisolator is an important component in digital switching applications. It provides electrical isolation between the input and output circuits, protecting both devices from electrical shock and electrical interference. In addition, it provides fail-safe protection against output power transients that may cause damage to sensitive devices. It can be used in a variety of industrial applications, from motor power controls to switch mode power supplies and watt-hour meters.

The specific data is subject to PDF, and the above content is for reference