MOC3021VM

Triac, SCR Output Optoisolators Overview

The MOC3021VM is a random-phase triac driver optocoupler featuring a gallium arsenide infrared LED coupled to a triac output. It provides electrical isolation for AC load control applications with a peak off-state voltage of 400V and an isolation voltage of 5300Vrms. The device operates within a temperature range of -40°C to +85°C, supports a forward current up to 60mA, and dissipates 330mW of power. Packaged in a 6-pin DIP through-hole configuration, it lacks zero-crossing detection circuitry.

Triac, SCR Output Optoisolators Feature Summary

• Random-phase triggering capability for precise AC load control without zero-crossing synchronization
• High voltage isolation between input and output circuits ensuring safe digital-analog separation
• Robust triac output structure designed for direct driving of high-power AC loads

Triac, SCR Output Optoisolators Applications

• AC motor speed control systems
• Solid state relay (SSR) driver circuits
• Industrial heating element regulation

Triac, SCR Output Optoisolators Procurement Notes

Verify the manufacturer origin carefully as Fairchild Semiconductor assets were acquired by ON Semiconductor. Ensure the part number suffix matches the required operating temperature range and packaging style. Confirm that the specific batch corresponds to the correct pinout and isolation voltage ratings specified in the official datasheet before integration into production designs.

Triac, SCR Output Optoisolators Selection Notes

Select this component when non-synchronized phase angle control is required for AC loads. It is suitable for applications where zero-crossing switching is not mandatory or where random-phase firing offers better performance. Consider the 400V output rating against the maximum line voltage and transient spikes expected in the target application environment.

Triac, SCR Output Optoisolators Part Context

This device belongs to the MOC30xx series of triac driver optocouplers. It shares functional similarities with other random-phase drivers but differs in specific voltage ratings and thermal characteristics compared to zero-crossing variants like the MOC3061. The VM suffix typically denotes a specific package and temperature grade variant within the broader product family.

Triac, SCR Output Optoisolators Replacement Considerations

MOC3021M

Triac, SCR Output Optoisolators FAQ

Does the MOC3021VM include zero-crossing detection?

No, the MOC3021VM is a random-phase triac driver and does not incorporate zero-crossing detection circuitry.

What is the maximum isolation voltage of the MOC3021VM?

The MOC3021VM provides an isolation voltage of 5300Vrms between the input LED and the output triac.