Q8012RH5

Triacs Overview

The Littelfuse Q8012RH5 is a bidirectional triac (Alternistor) rated for 800V repetitive peak off-state voltage and 12A RMS on-state current. It features a gate trigger current of 50mA and an on-state voltage of 1.6V at specified conditions. The device exhibits a maximum holding current of 70mA and a low off-state leakage current of 10µA. Designed for robust switching applications, it operates within a junction temperature range of -40°C to +125°C. The component is housed in a TO-220AB package with a three-pin configuration, suitable for through-hole mounting on printed circuit boards.

Triacs Feature Summary

• High-voltage blocking capability up to 800V for reliable operation in demanding AC environments
• Robust 12A RMS current handling capacity for power control applications
• Low on-state voltage drop of 1.6V to minimize conduction losses and heat generation
• Sensitive gate trigger requirement of 50mA facilitating direct interface with standard logic drivers

Triacs Applications

• AC motor speed control systems
• Solid-state relays for industrial switching
• Lighting dimmer circuits
• Heating element regulation

Triacs Procurement Notes

Verify the specific suffix designation when ordering, as variations such as TP or V may indicate different packaging formats or compliance certifications without altering the core electrical characteristics. Confirm the manufacturer source directly from Littelfuse or authorized distributors to ensure authenticity. Cross-reference the part number against official datasheets to validate pinout compatibility and thermal requirements before integration into final assemblies.

Triacs Selection Notes

Select this component when an 800V rating and 12A continuous current are required for AC load switching. Ensure the driving circuit can supply at least 50mA to guarantee reliable turn-on. Consider the TO-220AB package size for adequate heat dissipation during high-current operations. Verify that the application environment stays within the specified -40°C to +125°C operating temperature range to maintain performance integrity.

Triacs Part Context

This device belongs to the Qxx12xHx series of Alternistors, designed for high-reliability AC power control. It serves as a semiconductor switch alternative to mechanical relays, offering longer life and faster switching speeds. The series is engineered for industrial and consumer applications requiring robust protection against voltage transients and stable conduction characteristics under varying load conditions.

Triacs Replacement Considerations

Compatible substitutes include Q8012RH5TP and Q8012RH5V. These variants share identical electrical specifications but may differ in packaging style or RoHS compliance documentation. Verify pinout alignment and thermal resistance values before substitution to ensure seamless integration into existing board layouts.