QS8004DH4TP

Triacs Overview

The Littelfuse QS8004DH4TP is a high-voltage Triac belonging to the Qxx04xx series, designed for robust power control applications. It features an RMS on-state current of 4 A and a rated repetitive peak off-state voltage (VDRM) of 800 V. The device operates within a temperature range of -40 °C to +125 °C and utilizes a TO-252AA surface-mount package. Key electrical characteristics include a maximum holding current of 30 mA and a gate trigger voltage of 1.3 V DC. It offers a critical rate of voltage rise (dv/dt) of 40 V/µs and maintains low leakage current under blocking conditions.

Triacs Feature Summary

• High-voltage blocking capability suitable for demanding AC power switching environments
• Surface-mount construction in a compact TO-252AA package for automated assembly
• Robust thermal performance supporting operation up to 125 °C junction temperature

Triacs Applications

• Industrial motor speed control systems
• Solid-state relay designs requiring high isolation
• AC power regulation circuits in commercial appliances

Triacs Procurement Notes

Verify the exact part number against manufacturer documentation, as standard listings often reference the Q8004D4TP variant. Confirm RoHS compliance status and specific suffix requirements with the supplier. Ensure the ordering quantity aligns with factory packaging constraints. Request updated datasheets to validate pinout and thermal resistance parameters before finalizing procurement.

Triacs Selection Notes

Select this component when an 800 V rating is required for AC load switching. The 4 A RMS current capacity suits moderate power applications. Verify that the gate drive circuit can supply the specified 1.3 V trigger voltage. Consider the TO-252AA package dimensions for PCB layout compatibility. Evaluate thermal management needs given the 125 °C maximum operating temperature limit.

Triacs Part Context

This Triac is part of Littelfuse's Teccor Qxx04xx family, which provides standardized high-voltage solutions for industrial and consumer markets. The series emphasizes reliability in harsh electrical environments. The QS8004DH4TP designation indicates specific manufacturing or testing variations within the broader 800 V, 4 A product line.

Triacs Replacement Considerations

Direct substitutes may include other 800 V, 4 A Triacs in TO-252 packages from manufacturers like STMicroelectronics or Vishay. Verify equivalent dv/dt ratings and gate sensitivity. Ensure thermal characteristics match the original design requirements.