MOC3052M

Triac, SCR Output Optoisolators Overview

The MOC3052M is a single-channel Triac output optocoupler manufactured by Lite-On Inc. It features an internal AlGaAs infrared LED optically coupled to a photo-triac, designed for random phase triggering without zero-crossing circuitry. The device provides high isolation with a rated voltage of 5,000Vrms and supports a peak repetitive off-state voltage of 600V. Key electrical parameters include a maximum forward current of 50mA, a typical forward voltage of 1.2V, and a minimum static dV/dt of 1kV/µs. It operates within a temperature range of -40°C to +100°C and is housed in a standard 6-pin DIP package.

Triac, SCR Output Optoisolators Feature Summary

• Random phase triac driver output suitable for controlling resistive, inductive, or capacitive loads
• High isolation capability with 5,000Vrms input-to-output voltage rating
• Integrated AlGaAs infrared LED emitter for efficient optical coupling
• Robust noise immunity with a minimum static dV/dt specification of 1kV/µs

Triac, SCR Output Optoisolators Applications

• AC motor speed control circuits
• Solenoid and relay driver interfaces
• Solid-state relay (SSR) designs
• Industrial process control systems requiring galvanic isolation

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix against the manufacturer's latest datasheet to confirm pinout compatibility and insulation ratings. Ensure the selected variant meets the required isolation voltage for your safety certification standards. Cross-reference the package dimensions with your PCB footprint to avoid assembly errors during procurement.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random phase firing is required rather than zero-crossing switching. Confirm that the load current does not exceed the photo-triac's RMS capacity or requires external heat sinking. Verify that the control circuit can supply the necessary trigger current to ensure reliable turn-on under all operating conditions.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC3052 series of triac driver optocouplers. It is distinct from zero-crossing variants like the MOC3041, offering immediate response to control signals. The series is widely used in consumer and industrial electronics where precise timing of AC power delivery is critical.

Triac, SCR Output Optoisolators Replacement Considerations

Direct substitutes include the MOC3052VM from onsemi, which shares similar electrical characteristics and pin configuration. Other compatible alternatives may include parts from Vishay or Everlight, provided they match the 600V blocking voltage and random phase output requirements.

Triac, SCR Output Optoisolators FAQ

Does the MOC3052M include a zero-crossing detection circuit?

No, the MOC3052M is a random phase device and does not contain zero-crossing circuitry.

What is the maximum isolation voltage between the input and output?

The device supports an isolation voltage of 5,000Vrms.