Q6040J781TP

Triacs Overview

The Littelfuse Q6040J781TP is a bidirectional triac designed for AC power control applications. It features an RMS on-state current of 40 A and a rated repetitive off-state voltage of 600 V. The device supports non-repetitive on-state currents of 335 A and 400 A, with an on-state voltage of 1.8 V. Gate trigger specifications include a maximum holding current of 120 mA, a gate trigger voltage of 2.5 V, and a gate trigger current of 100 mA. It operates within a temperature range of -40°C to +125°C and utilizes a TO-218X-3 through-hole package.

Triacs Feature Summary

• High thermal stability with a maximum operating temperature of +125°C
• Robust surge handling capability with specified non-repetitive on-state current ratings
• Standardized gate triggering characteristics for reliable interface with control circuits

Triacs Applications

• AC motor speed control systems
• Solid-state relay implementations
• General-purpose AC power switching

Triacs Procurement Notes

Verify the specific suffix J781 against manufacturer documentation to confirm insulation class and pinout configuration. Ensure the TO-218X-3 package dimensions match the target PCB footprint. Confirm RoHS compliance status via the official datasheet before finalizing component selection for regulated markets.

Triacs Selection Notes

Select this component when a 40 A RMS current rating and 600 V blocking voltage are required in a standard through-hole form factor. Evaluate the 1.8 V on-state voltage drop for thermal management calculations. Compare gate trigger requirements against the driving circuit capabilities to ensure reliable turn-on under varying load conditions.

Triacs Part Context

This part belongs to the Littelfuse Qxx40xx series of high-power triacs. The series is characterized by robust construction suitable for industrial and commercial power control environments. The Q6040J781TP specifically denotes a variant within this family optimized for general AC switching duties.

Triacs Replacement Considerations

Cross-reference with other 40 A, 600 V triacs in TO-218 packages from manufacturers such as STMicroelectronics or Vishay. Verify that alternative parts meet the same electrical parameters and physical mounting constraints.