QJ4004D4TP

Triacs Overview

The Littelfuse QJ4004D4TP is a bidirectional triac designed for AC power control applications. It operates within a rated repetitive off-state voltage (VDRM) of 400 V and supports an on-state RMS current (It RMS) of 4 A. The device features a low on-state voltage of 1.4 V, with a gate trigger voltage (Vgt) of 1.3 V and a gate trigger current (Igt) of 25 mA. Leakage current in the off-state is limited to 5 uA at VDRM. It functions reliably across a temperature range from -40 C to +150 C. The component is housed in a surface-mount TO-252-3 package.

Triacs Feature Summary

• High thermal stability enabling operation up to +150 C
• Low gate sensitivity requiring minimal drive current
• Compact surface-mount form factor for automated assembly

Triacs Applications

• AC motor speed control circuits
• Solid-state relay switching modules
• Lighting dimmer control systems

Triacs Procurement Notes

Verify the specific Littelfuse datasheet for the QJ4004D4TP to confirm RoHS compliance status and REACH SVHC declarations prior to integration. Ensure the ordering suffix matches the required tube packaging quantity of 750 units. Cross-reference the manufacturer part number against authorized distributor catalogs to validate authenticity and traceability.

Triacs Selection Notes

Select this component when a 400 V rating and 4 A continuous current capacity are sufficient for the load requirements. Consider the TO-252-3 package constraints regarding PCB thermal dissipation capabilities. Compare gate trigger specifications against the available driver circuit output to ensure reliable turn-on characteristics under varying temperature conditions.

Triacs Part Context

This triac belongs to the QJxx04xx series from Littelfuse, which focuses on standard performance thyristors. It shares the 4 A current class with other variants but is distinguished by its 400 V voltage rating and specific gate parameters. The series provides standardized solutions for general-purpose AC power switching tasks.

Triacs Replacement Considerations

The Q4004D4RP is a related variant within the same manufacturer portfolio offering similar electrical ratings but differs in packaging format and potentially thermal limits.