QS8004DH4RP

Triacs Overview

The Littelfuse QS8004DH4RP is a bidirectional triac from the Teccor Qxx04xx series, designed for AC switching and phase control applications. It features an RMS on-state current of 4 A and a rated repetitive off-state voltage (VDRM) of 800 V. The device operates within a junction temperature range of -40°C to +125°C and utilizes a TO-252-3 surface-mount package. Key electrical parameters include a maximum holding current of 30 mA, a gate trigger voltage of 2.5 V, and a gate trigger current ranging from 25 mA to 50 mA. Non-repetitive peak on-state currents are specified at 46 A and 55 A, with an on-state voltage of 1.6 V and a leakage current of 10 uA under VDRM conditions.

Triacs Feature Summary

• Integrated bidirectional AC switch suitable for noise-immune phase control
• Glass-passivated junctions ensure long-term parameter stability
• Surface-mount TO-252-3 package design for automated assembly

Triacs Applications

• AC speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the specific datasheet revision and RoHS compliance status directly with Littelfuse or authorized distributors before finalizing procurement. Confirm that the TO-252-3 package dimensions match the target PCB footprint requirements. Ensure that the 800 V rating and 4 A current capacity align with the circuit's operational stress levels and thermal management capabilities.

Triacs Selection Notes

Select this component when designing circuits requiring robust AC phase control with high voltage blocking capability. The 800 V rating provides sufficient margin for standard industrial line voltages. Consider the 4 A RMS current limit and the thermal dissipation characteristics of the TO-252-3 package when determining heat sink requirements or PCB copper area for adequate thermal performance.

Triacs Part Context

This part belongs to the Littelfuse Teccor Qxx04xx series of triacs, which are widely used in general-purpose AC power control applications. The series is characterized by glass-passivated junctions for reliability and is available in various voltage and current ratings. The QS8004DH4RP specifically targets applications needing 800 V blocking capability in a compact surface-mount form factor.

Triacs Replacement Considerations

Consult Littelfuse official documentation for confirmed substitute part numbers within the Qxx04xx family or equivalent Triac products from other manufacturers. Verify pinout compatibility and electrical parameter equivalence before substitution.