MOC3083SVM

Triac, SCR Output Optoisolators Overview

The MOC3083SVM is a single-channel Triac and SCR output optocoupler manufactured by onsemi. It integrates an infrared emitting diode with a zero-crossing detection circuit and a triac output, designed for precise AC power switching applications. The device features a surface-mount SMD-DIP-6 package, providing robust electrical isolation with a rated insulation voltage of 5250 Vrms. Key electrical parameters include a forward current (If) of 60 mA, a forward voltage (Vf) of 1.3 V, and a maximum power dissipation (Pd) of 250 mW. The output triac supports a peak repetitive off-state voltage (VDRM) of 800 V and triggers at a zero-crossing voltage of approximately 20 V. The component operates within a temperature range of -40°C to +85°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrates a zero-crossing detection circuit to minimize electromagnetic interference during AC load switching.
• Provides high-voltage electrical isolation between input control circuits and high-power AC outputs.
• Combines an infrared LED emitter with a sensitive triac output for efficient gate drive capability.

Triac, SCR Output Optoisolators Applications

• Solid-state relays for industrial automation
• AC motor speed controllers
• Lighting dimmer circuits

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Confirm RoHS compliance status through manufacturer documentation. Ensure the ordering part number matches the required zero-crossing functionality and voltage ratings for the target application.

Triac, SCR Output Optoisolators Selection Notes

Select this component when zero-crossing switching is required to reduce noise in AC line applications. The 800 V rating suits standard mains voltage environments. Verify that the 60 mA forward current requirement aligns with the microcontroller or driver interface available in the design.

Triac, SCR Output Optoisolators Part Context

This device belongs to the MOC3083M series of Triac and SCR output optocouplers from onsemi. It is part of a family designed for general-purpose AC power control, offering reliability in isolated switching scenarios where low crosstalk and high insulation strength are critical for safety and performance.

Triac, SCR Output Optoisolators Replacement Considerations

Check for direct pin-compatible alternatives such as the MOC3082 series if different voltage ratings are acceptable. Verify functional equivalence regarding zero-crossing thresholds and isolation voltages before substitution.

Triac, SCR Output Optoisolators FAQ

What is the purpose of the zero-crossing circuit in this optocoupler?

The zero-crossing circuit ensures the triac turns on only when the AC voltage is near zero, significantly reducing electromagnetic interference (EMI) and inrush currents associated with hard switching.

What is the maximum isolation voltage of the MOC3083SVM?

The device provides an insulation voltage of 5250 Vrms, ensuring safe separation between the low-voltage control side and the high-voltage AC load side.