VO4258M

Overview

The VO4258M is a single-channel Triac and SCR output optocoupler manufactured by Vishay Semiconductor Opto Division. It features a non-zero-crossing photo-triac output capable of blocking up to 800 V in the off-state. The device provides an isolation voltage of 5300 Vrms between input and output circuits. It operates with a maximum forward current of 60 mA and has a peak forward voltage of 1.2 V. The component supports a maximum continuous output current of 300 mA and dissipates up to 600 mW. It functions within a temperature range of -55°C to +100°C and is housed in a PDIP-6 package.

Feature Summary

• Non-zero-crossing photo-triac output for precise phase-angle control
• High insulation voltage of 5300 Vrms for robust circuit isolation
• High off-state voltage capability of 800 V for reliable blocking
• Wide operating temperature range from -55°C to +100°C

Applications

• Solid-state relays requiring phase-angle control
• Motor speed control circuits
• Lighting dimmer applications
• Industrial process control systems

Procurement Notes

Verify the specific suffix against official Vishay documentation to confirm package type and tape/reel specifications. Ensure the selected variant matches the required lead-free status and RoHS compliance for your manufacturing process. Cross-reference the datasheet revision date to confirm parameter validity before finalizing procurement orders.

Selection Notes

Select this component when non-zero-crossing switching is required for AC load control. The 800 V blocking voltage suits high-voltage AC mains applications. Verify that the 300 mA continuous output current meets the load requirements. Consider the PDIP-6 package constraints for PCB layout and thermal management during design integration.

Part Context

This part belongs to the Vishay Triac and SCR output optocoupler family. It is distinct from zero-crossing variants like the VO4252 series, which are designed for low-noise switching rather than phase control. The VO4258M specifically targets applications where immediate conduction upon signal receipt is necessary for accurate power regulation.

Replacement Considerations

Direct substitutes include other Vishay non-zero-crossing triac optocouplers such as the VO4252 series if zero-crossing behavior is acceptable. Verify pinout compatibility and electrical parameters like holding current and dv/dt ratings before substituting with components from other manufacturers.