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FAIRCHILD SEMICONDUCTOR - MOC3052-M

Former Member

hi i have a question here...what is the difference between MOC3052-without zero crossing circuit and MOC3081-MMOC3081-M with zero crossing circuit? can i replace MOC3052 to MOC3081?

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    It depends on application. MOC3081-MMOC3081-M is intended for on/off switching of load and MOC3052 can also be used for e.g. dimming. MOC3081 with zero crossing circuit switches on when voltage is rising from zero, so it can switch on load generating low noise, but cannot be used when phase control is needed. MOC3052 can swich on load at different phases, so it can be used in dimmer, motor speed control etc.

    Additionally MOC3081-MMOC3081-M has higher LED trigger current (15mA) than MOC3052 (10mA).

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    It depends on application. MOC3081-MMOC3081-M is intended for on/off switching of load and MOC3052 can also be used for e.g. dimming. MOC3081 with zero crossing circuit switches on when voltage is rising from zero, so it can switch on load generating low noise, but cannot be used when phase control is needed. MOC3052 can swich on load at different phases, so it can be used in dimmer, motor speed control etc.

    Additionally MOC3081-MMOC3081-M has higher LED trigger current (15mA) than MOC3052 (10mA).

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