VO4258H

Overview

The VO4258H is a non-zero crossing phototriac optocoupler featuring a GaAs infrared LED coupled to a photosensitive TRIAC in a DIP-6 package. It offers an isolation voltage of 5300 Vrms and supports a maximum continuous output current of 300 mA with an off-state voltage of 800 V. The device operates within a temperature range of -55°C to +100°C, has a forward current rating of 60 mA, and requires a trigger current of 2 mA.

Feature Summary

• Non-zero crossing operation for phase-angle control applications
• High insulation voltage capability of 5300 Vrms
• Robust static dV/dt performance

Applications

• Solid-state relays
• Motor control circuits
• Lighting dimmers

Procurement Notes

Verify the specific suffix against official Vishay documentation to confirm packaging and tape-and-reel specifications. Ensure the selected variant matches the required DIP-6 through-hole configuration and that all electrical ratings align with the target circuit design requirements before procurement.

Selection Notes

Select this component when non-zero crossing switching is acceptable or required for the load type. Consider the 800 V blocking voltage and 300 mA current capacity for appropriate load matching. Verify thermal management needs given the 600 mW power dissipation limit and operating temperature range constraints.

Part Context

This part belongs to the Vishay VO425x series of phototriac optocouplers. It shares the same internal architecture as variants like the VO4258D but differs in specific trigger current characteristics. The series is designed for general-purpose AC load switching where high isolation is necessary.

Replacement Considerations

The VO4258D is a documented alternative within the same family, offering similar functionality with a specified trigger current of 1.6 mA. Verify compatibility regarding trigger drive levels and ensure the replacement meets all isolation and voltage ratings.