Q8004L4

Triacs Overview

The Littelfuse Q8004L4 is a standard triac rated for 800 V repetitive peak off-state voltage and 4 A RMS on-state current. It features a gate trigger voltage of 2.5 V and a maximum holding current of 30 mA. The device operates within a junction temperature range of -40°C to +125°C and utilizes a TO-220-2 isolated tab package for through-hole mounting.

Triacs Feature Summary

• Provides bidirectional AC switching capability for phase control applications
• Features an isolated tab design for efficient thermal management
• Designed for robust performance in motor speed and temperature modulation circuits

Triacs Applications

• Motor speed control systems
• Temperature modulation devices
• Solid-state switches
• Power tools
• White goods

Triacs Procurement Notes

Verify the specific datasheet revision and RoHS compliance status directly with Littelfuse or authorized distributors before integration. Confirm that the TO-220-2 package dimensions match the target PCB footprint requirements. Ensure the thermal resistance characteristics align with the system's heat dissipation strategy for reliable operation at maximum load conditions.

Triacs Selection Notes

Select this component when an 800 V blocking voltage and 4 A continuous current rating are required for AC power control. The TO-220-2 package is suitable for applications needing electrical isolation from the heatsink. Consider the 2.5 V gate trigger sensitivity for compatibility with standard logic-level drive circuits in consumer electronics and industrial equipment.

Triacs Part Context

This part belongs to the Qxx04xx series of low-power TRIACs from Littelfuse, designed for voltages up to 1200V. It serves as a solid-state alternative to mechanical relays in AC switching environments. The series is characterized by high reliability and compact packaging options for various power control needs.

Triacs Replacement Considerations

The Q8004D4RP offers similar electrical ratings but uses a surface-mount TO-252-3 package instead of the through-hole TO-220-2 form factor. Designers requiring SMD solutions may consider this variant, provided the PCB layout supports the different physical dimensions and thermal profile.