VOT8123AG

Overview

The VOT8123AG is a Triac and SCR output optocoupler manufactured by Vishay Semiconductor Opto Division. It features a Non-Zero Crossing (NZC) design, allowing for precise phase-angle control in AC power applications. The device provides an isolation voltage of 5000Vrms and supports a repetitive peak off-state voltage (Vdrm) of 800V. It is housed in a standard DIP-6 package with a 400-mil lead spacing, suitable for through-hole mounting on printed circuit boards.

Feature Summary

• Non-zero crossing output architecture enables independent phase-angle control for fine-tuned AC power regulation
• High insulation capability with 5000Vrms isolation rating ensures robust safety between input and output circuits
• 800V repetitive peak off-state voltage supports high-voltage AC load switching applications

Applications

• AC motor speed control systems requiring phase-angle firing
• Solid-state relays for industrial AC load switching
• Lighting dimmer circuits for incandescent or resistive loads

Procurement Notes

Verify the specific suffix 'AG' to confirm the DIP-6 package and RoHS compliance status. Ensure the application requires Non-Zero Crossing behavior rather than Zero-Crossing, as this affects turn-on timing. Confirm that the 800V Vdrm rating meets the peak line voltage requirements of the target AC system. Check for any recent Product Change Notifications regarding manufacturing site changes.

Selection Notes

Select this component when phase-angle control is necessary, distinguishing it from zero-crossing variants which are limited to resistive loads at voltage peaks. The 5000Vrms isolation is critical for safety-certified designs. Consider the DIP-6 footprint constraints during PCB layout. Verify that the static dv/dt rating of 1kV/µs is sufficient for the noise environment of the AC line being controlled.

Part Context

This part belongs to the Vishay VOT812x series of optotriacs designed for AC power control. Unlike zero-crossing devices, the non-zero crossing feature allows triggering at any point in the AC cycle, making it suitable for inductive loads and precise power regulation where soft-start or dimming characteristics are required.

Replacement Considerations

Check for direct substitutes within the VOT812x family, such as VOT8121 or VOT8123 variants with different packaging or isolation ratings. Ensure any replacement maintains the Non-Zero Crossing characteristic if phase control is essential. Verify pinout compatibility for DIP-6 packages before substitution.