QJ4004D3RP

Triacs Overview

The Littelfuse QJ4004D3RP is a bidirectional triac in the Teccor QJxx04xx series, designed for surface-mount applications. It features a TO-252 (D-Pak) three-pin package and supports soldering on printed circuit boards. The device handles an RMS on-state current of 4 A with a rated repetitive peak off-state voltage of 400 V. It operates within a junction temperature range of -40°C to +125°C. Key electrical characteristics 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. The component exhibits a low on-state voltage of 1.6 V and a maximum off-state leakage current of 10 µA at VDRM.

Triacs Feature Summary

• Surface-mount construction utilizing a compact TO-252 D-Pak package for automated PCB assembly.
• High thermal stability enabling reliable operation across extended industrial temperature ranges.
• Sensitive gate drive requirements facilitating direct interfacing with microprocessor control logic.

Triacs Applications

• Solid-state relays requiring compact switching solutions
• General-purpose AC motor speed control circuits
• Lighting dimmer modules for residential and commercial fixtures

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm pinout orientation and internal specifications. Confirm RoHS compliance status through the manufacturer's latest environmental declarations. Ensure the ordering quantity aligns with standard reel packaging constraints provided by authorized distributors. Validate that the selected variant matches the required voltage and current ratings for the target application circuit.

Triacs Selection Notes

Select this component when a surface-mount TRIAC is required for 400V AC control applications. Compare the 4A RMS rating against load requirements to ensure adequate margin. Evaluate the TO-252 package thermal performance against available PCB copper area for heat dissipation. Consider the gate sensitivity parameters to ensure compatibility with the driving circuit's output capability.

Triacs Part Context

This part belongs to the Teccor QJxx04xx family of high-performance triacs manufactured by Littelfuse. The series offers various voltage ratings and package options to suit different power management needs. The QJ4004D3RP specifically addresses the demand for robust, space-efficient switching components in modern electronic designs where traditional through-hole packages are impractical.

Triacs Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Engineers should consult Littelfuse technical support or authorized distributor cross-reference tools for verified equivalents based on specific electrical and mechanical constraints.