MOC3021SR2M Isolators

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The MOC3021SR2M is a cost-effective family of Optosilcators with a Triac Output. The Optosilcators are used to provide isolation between low voltage control circuits and higher voltage loads in many applications. The MOC3021SR2M features a Triac Output with an extremely low on resistance of 0.75 ohms, and a very low voltage drop. It is specifically designed for applications with a high-performance requirement.

MOC3021SR2M is ideal for LED lighting dimming, motor control, door control, and surge/overvoltage protection. It is also an ideal choice for applications where low-power control and current limiting is required, such as automotive, consumer and industrial applications. The MOC3021SR2M is UL Recognized, meaning it has been tested and meets all relevant safety standards.

The working principle of the MOC3021SR2M is simple. It has an LED input which is connected to the input voltage. When the input voltage rises above a certain threshold, the LED will be energized and will emit light. This light is picked up by the phototransistor (TRI), which switches on the TRIAC. The TRIAC then opens the main circuit and allows current to flow through the load. The system will then switch off the LED when the input voltage falls below a certain threshold.

The MOC3021SR2M also has some unique features that make it a great choice for many applications. It is capable of low-power control, voltage/current limiting, and over-voltage protection. It can provide noise immunity and low EMI (electromagnetic interference). It also has a built-in “flywheel” diode for fast switching and a “Matte” TRIAC for reliable operation over long-term use. The MOC3021SR2M also offers built-in solder masking and thermal shut-off protection, and has a thermal shutdown temperature of 160° C.

In conclusion, the MOC3021SR2M is a cost-effective, low-power, high-performance Optosilcator with a Triac Output which can be used in a variety of applications. It provides isolation between low voltage control circuits and higher voltage loads, and has excellent features such as low-power control, voltage/current limiting, and over-voltage protection. It is UL tested and also has a built-in “flywheel” diode for fast switching and a “Matte” TRIAC for reliable operation over long-term use. The MOC3021SR2M is an ideal choice for automotive, consumer, industrial, and LED lighting applications.

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