MOC3011SM

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MOC3011SM is a family of optoisolators designed for use in applications requiring high off-state transmittance and coupling or galvanic isolation. It allows TRIAC, SCR and other components to be controlled safely in both AC and DC circuits. It is specifically designed to provide a limit current through the control element, which effectively reduces inductive switching noise.

The MOC3011SM is composed of gallium arsenide infrared emitting diode (IRED), optically coupled with a monolithic silicon detector, with a zero voltage crossing TRIAC output stage. It can provide 2500V rms isolation with a 0.5mA maximum transfer current.

In general, MOC3011SM optoisolators are used for switching AC and DC loads in applications such as motor starters, light operating and safety systems. It is ideal for the AC load control with power triac, and it can replace contactors, relay or mechanical switches in medium to high power AC and DC applications. It is highly efficient and extremely reliable as it can operate within the temperature range from -550 C to 1250 C.

The working principle of MOC3011SM is based on the capacitive coupling principle. When the optocoupler is illuminated, an electric field is generated between the base and the emitter terminal of the optocoupler. This electric field gives the optocoupler its ability to transfer a signal from one end to the other. When a voltage is applied, the LED emits light, which is detected by the photodetector. The detected light then turns on the TRIAC, which acts as a switch in the optoisolator.

MOC3011SM optoisolators work in accordance with the open-loop system. This system is powered without a feedback loop and consists of two loops, one coupled two the input and the other coupled to the output signal. The input loop is responsible for providing the necessary power to the optoisolator. The input signal is converted into the output signal by the optoisolator itself, which then drives the output signal. The output signal is then used to control the load.

MOC3011SM optoisolators are designed for controlling TRIACs, SCRs and other devices in AC and DC circuits. It reduces the amount of noise generated by inductive switching, ensures higher off-state transmittance and provides galvanic isolation. It is highly reliable and cost effective, and highly suitable for applications such as motor starters, light operating and safety systems.

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