SST24A-800BW

Triacs Overview

The SST24A-800BW is a standard TRIAC manufactured by SMC Diode Solutions, designed for high-voltage AC power control applications. It features an 800 V peak reverse voltage rating and supports a continuous on-state current of 25 A. The device utilizes a TO-220A package with three leads, facilitating through-hole mounting on printed circuit boards. Key electrical characteristics include a gate trigger voltage typically ranging from 1.3 V to 1.5 V and a holding current of 100 mA. Operating within a junction temperature range of -40°C to 125°C, it ensures reliable performance in industrial environments.

Triacs Feature Summary

• High voltage blocking capability up to 800 V for robust AC line protection
• High current handling capacity of 25 A for substantial load switching
• Standard gate sensitivity for straightforward driver interface compatibility
• Thermal stability maintained across extended industrial temperature ranges

Triacs Applications

• Industrial motor speed control systems
• Solid-state relay output stages
• Lighting dimmer circuits for commercial loads
• Heating element regulation in manufacturing equipment

Triacs Procurement Notes

Verify the specific datasheet revision when sourcing, as electrical parameters may vary slightly between updates. Confirm that the TO-220A package dimensions match your PCB footprint requirements. Ensure thermal management solutions are adequate for the expected RMS current levels to prevent junction overheating during continuous operation.

Triacs Selection Notes

Select this component when applications require high voltage isolation combined with significant current carrying capacity. The through-hole construction offers mechanical stability for heavy loads compared to surface-mount alternatives. Evaluate gate drive capabilities to ensure sufficient current is available for reliable triggering under varying load conditions.

Triacs Part Context

This part belongs to the SST series of TRIACs from SMC Diode Solutions, which are engineered for general-purpose phase control. The '800' designation indicates the voltage class, while '24' denotes the current rating family. These devices are commonly used in power electronics where robustness and simple control logic are prioritized over miniaturization.

Triacs Replacement Considerations

Direct substitutes must match the 800 V / 25 A specification and TO-220A package. Check equivalent parts from other manufacturers for identical pinout configurations and thermal resistance values to ensure seamless integration without redesigning the heatsink or PCB layout.

Triacs FAQ

What is the maximum repetitive peak off-state voltage?

The maximum repetitive peak off-state voltage (VDRM) is 800 V.

Does this device support bidirectional current flow?

Yes, as a TRIAC, it conducts current in both directions when triggered by a gate signal.