Q4030LH5TP

Triacs Overview

The Littelfuse Q4030LH5TP is a bidirectional triac designed for AC power control applications. It features a 400V repetitive peak off-state voltage and a 30A on-state current rating. The device operates with a gate trigger current of 50-50-50 mA and exhibits an on-state voltage of 1.4 V. Off-state leakage current is specified at 10 uA under VDRM IDRM conditions. It is housed in a TO-220-2 package, suitable for through-hole mounting.

Triacs Feature Summary

• Bidirectional switching capability for alternating current circuits
• High thermal stability via robust TO-220-2 leaded packaging
• Low gate sensitivity for efficient triggering logic

Triacs Applications

• AC motor speed control systems
• Solid-state relay implementations
• Lighting dimmer circuitry

Triacs Procurement Notes

Verify the specific suffix 'TP' against the manufacturer's latest datasheet to confirm tape-and-reel packaging specifications. Ensure the TO-220-2 pinout matches the target PCB footprint design. Cross-reference the 400V voltage rating with system transient requirements to prevent overvoltage failure during operation.

Triacs Selection Notes

Select this component when a 400V blocking voltage and 30A continuous current capacity are required for AC loads. The TO-220-2 package facilitates heatsinking for high-power dissipation scenarios. Verify that the 50mA gate drive current aligns with the available control signal amplitude from the driving microcontroller or optocoupler interface.

Triacs Part Context

This part belongs to the Qxx30xHx series of thyristors manufactured by Littelfuse. The series is characterized by high reliability and standardized electrical parameters for industrial AC power switching. The Q4030LH5TP specifically denotes the 400V variant within this family, sharing common thermal and mechanical characteristics with other ratings in the lineup.

Triacs Replacement Considerations

Direct replacements must match the 400V/30A rating and TO-220-2 package. Check equivalent parts from manufacturers like STMicroelectronics or ON Semiconductor for compatible triacs with identical pinouts and electrical limits.