VO4256D

Overview

The VO4256D is a non-zero-crossing photo-triac optocoupler manufactured by Vishay Semiconductor Opto Division. It features a 6-pin DIP package and provides electrical isolation with an insulation voltage of 5300 Vrms. The device supports a maximum continuous output current of 300 mA and offers a blocking voltage of 600 V in the off-state. Key electrical parameters include a forward current of 60 mA, a forward voltage of 1.2 V, and a power dissipation of 600 mW. It operates within a temperature range of -55°C to +100°C and has a minimum static dV/dt rating of 5 kV/µs.

Feature Summary

• Non-zero-crossing triac output for phase-angle control applications
• High input sensitivity with low trigger current requirements
• Robust insulation capability for high-voltage isolation
• High static dV/dt immunity to prevent false triggering

Applications

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

Procurement Notes

Verify the specific suffix designation when ordering, as packaging formats vary between tube and reel configurations. Confirm that the selected variant matches the required through-hole installation style. Ensure compliance with RoHS directives if applicable to the project specifications. Cross-reference the manufacturer part number with distributor catalogs to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this component for designs requiring precise phase-angle control rather than zero-crossing switching. The 600 V blocking voltage suits general-purpose AC load switching. Consider the 300 mA on-state current limit when sizing loads. The DIP-6 package facilitates easy prototyping and through-hole assembly processes compared to surface-mount alternatives.

Part Context

This device belongs to the VO4256 family of triac output optocouplers. It shares functional similarities with variants like the VO4256H but differs in trigger current specifications and packaging options. The standard DIP-6 configuration distinguishes it from surface-mount versions such as the VO4256D-X007T, which utilizes a gull-wing SMD package.

Replacement Considerations

Direct replacements include other Vishay VO4256 series variants with matching pinouts. Verify trigger current compatibility when substituting with different sensitivity grades. Ensure the replacement maintains the same 600 V blocking voltage and 300 mA current handling capabilities.