Q8004V4TP

Triacs Overview

The Littelfuse Q8004V4TP is a bidirectional triac from the Teccor Qxx04xx series, designed for general-purpose AC power control applications. It features an RMS on-state current (It RMS) of 4 A and a rated repetitive peak off-state voltage (VDRM) of 600 V. The device operates within a junction temperature range of -40°C to +125°C and is housed in a TO-251-3 (DPAK) surface-mount package. Key electrical characteristics include a maximum holding current (Ih) of 30 mA, a gate trigger voltage (Vgt) of 2.5 V, and a gate trigger current (Igt) ranging from 25 mA to 50 mA. The non-repetitive peak on-state current is specified at 46 A or 55 A depending on conditions, with a typical on-state voltage of 1.6 V.

Triacs Feature Summary

• Surface-mount construction in a compact TO-251-3 package for automated PCB assembly
• Bidirectional conduction capability for AC load switching and phase control
• High thermal stability supporting operation up to +125°C junction temperature

Triacs Applications

• General-purpose AC motor speed control circuits
• Solid-state relay (SSR) output stages
• Lighting dimmer modules for resistive and inductive loads

Triacs Procurement Notes

Verify the specific suffix 'V4' against the manufacturer's latest datasheet to confirm pinout orientation and packaging style, as variations exist within the Q8004 family. Confirm RoHS compliance status directly with Littelfuse documentation prior to integration. Ensure ordering quantities align with standard tube packaging configurations typically supplied by distributors.

Triacs Selection Notes

Select this component when a 600 V blocking voltage is sufficient for the application, offering a cost-effective alternative to higher-rated 800 V variants. The 4 A RMS rating suits low-to-medium power AC loads. Compare gate sensitivity requirements against the driver circuit capabilities, noting the 25-50 mA Igt specification. Consider thermal management needs given the small DPAK footprint and limited heat dissipation area compared to through-hole alternatives.

Triacs Part Context

This part belongs to the Littelfuse Teccor Qxx04xx series of high-performance triacs. It shares core electrical parameters with the Q8004D4TP but differs in voltage rating (600 V vs. 800 V) and physical package (TO-251-3 vs. TO-252). The series is widely used in consumer electronics and industrial controls requiring reliable AC switching in compact form factors.

Triacs Replacement Considerations

Direct pin-compatible substitutes may include other 600 V, 4 A triacs in TO-251 packages from manufacturers like STMicroelectronics or Vishay. Verify that replacement devices meet the same VDRM, It RMS, and Igt specifications. Cross-reference thermal resistance values to ensure equivalent performance under identical mounting conditions.