Q8040K3TP

Triacs Overview

The Littelfuse Q8040K3TP is a standard TRIAC rated for 800 V repetitive peak off-state voltage and 40 A RMS on-state current. It utilizes an isolated TO-218AC (SMTO-218) through-hole package. Key electrical parameters include a maximum holding current of 80 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 100 mA. The device supports a non-repetitive surge current of 500 A and exhibits a typical on-state voltage of 1.6 V. Operating temperature ranges from -40°C to +150°C junction temperature.

Triacs Feature Summary

• Isolated tab construction for enhanced thermal management and electrical isolation in high-voltage applications
• Standard triggering characteristics with defined gate sensitivity for reliable control circuit interfacing
• Robust surge current capability designed for handling transient loads in AC power switching environments

Triacs Applications

• Industrial motor speed control systems
• High-power lighting dimmer circuits
• Solid-state relay output stages

Triacs Procurement Notes

Verify the specific suffix K3 against official Littelfuse documentation to confirm exact gate trigger specifications and thermal resistance values. Ensure the procurement channel provides valid RoHS compliance certificates and original manufacturer traceability. Cross-reference the datasheet revision date to guarantee alignment with current manufacturing standards and pinout configurations before integration into production designs.

Triacs Selection Notes

Select this component when an isolated TRIAC is required for voltages up to 800 V and currents up to 40 A. The TO-218AC package suits applications needing robust heat dissipation via chassis mounting. Verify that the gate trigger requirements of the driving circuit align with the specified 1.3 V and 100 mA thresholds to ensure proper turn-on reliability under varying temperature conditions.

Triacs Part Context

This part belongs to the QJ/Q series of TRIACs from Littelfuse, designed for general-purpose AC power control. The series offers various voltage and current ratings within the same standardized package family. The Q8040K3TP specifically targets applications requiring moderate power handling with electrical isolation between the main terminals and the mounting base.

Triacs Replacement Considerations

Direct substitutes may include other 800V 40A isolated TRIACs in TO-218 packages from manufacturers such as STMicroelectronics or Vishay. Verify equivalent electrical parameters, particularly holding current and gate trigger characteristics, to ensure functional compatibility without redesigning the drive circuitry.