S8012R

Overview

The Littelfuse S8012R is a silicon-controlled rectifier (SCR) designed for high-power industrial applications. It features a standard TO-220AB insulated tab package, providing electrical isolation from the heatsink. The device is rated for a repetitive peak forward voltage of 1200 volts and a continuous on-state current of 8 amperes. Key electrical characteristics include a maximum RMS on-state current of 12.5 amperes and a non-repetitive peak surge current capability of 100 amperes. The component operates with a gate trigger voltage typically around 1.3 volts and maintains a low holding current to ensure reliable latching in circuit configurations.

Feature Summary

• Insulated tab construction allows direct mounting to heatsinks without additional insulating hardware
• High surge current capacity supports robust performance under transient load conditions
• Standard pin-out configuration facilitates integration into existing power control designs

Applications

• Industrial motor speed control systems
• Solid-state relay switching circuits
• AC power regulation modules

Procurement Notes

Verify the specific suffix designation against manufacturer documentation to confirm exact thermal and electrical ratings. Ensure the purchased component matches the required voltage and current specifications for the target application. Confirm package type compatibility with existing board layouts and thermal management strategies before finalizing orders.

Selection Notes

Select this component based on its 1200V blocking capability and 8A continuous current rating. Evaluate thermal resistance requirements for the TO-220AB package within the intended enclosure environment. Compare surge current limits against expected fault conditions to ensure adequate safety margins for the specific circuit design.

Part Context

This SCR belongs to Littelfuse's general-purpose thyristor family, engineered for reliable phase control in medium-power scenarios. The S8012R variant specifically addresses applications requiring moderate voltage handling with compact packaging solutions. Its design prioritizes ease of installation and thermal stability for consistent operation in demanding industrial environments.

Replacement Considerations

Direct replacements must match the 1200V/8A rating and TO-220AB insulated package. Verify equivalent gate trigger characteristics and thermal resistance values. Consult manufacturer cross-reference guides for confirmed compatible part numbers from other suppliers.