Q4016LH4

Triacs Overview

The Q4016LH4TP is a bidirectional triac manufactured by Littelfuse, designed for AC power control applications. It features a rated repetitive peak off-state voltage (VDRM) of 400 V and an RMS on-state current (IT(RMS)) of 16 A. The device operates within a junction temperature range of -40°C to +125°C. Key electrical characteristics include a maximum holding current of 35 mA and a typical gate trigger current of 35 mA. The component is housed in a TO-220AB package with two leads, providing robust thermal performance for industrial and consumer power switching circuits.

Triacs Feature Summary

• High current handling capability suitable for demanding AC load switching
• Robust thermal design utilizing a standard TO-220AB leaded package
• Low gate sensitivity facilitating direct drive from logic or optocoupler interfaces

Triacs Applications

• Solid-state relays for industrial automation
• AC motor speed control systems
• Lighting dimmer circuits for commercial and residential use

Triacs Procurement Notes

Verify the specific suffix (e.g., TP) against the official Littelfuse datasheet to confirm packaging type and compliance status. Ensure the ordering part number matches the required voltage and current ratings for the target circuit design before procurement.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 16 A continuous current are required in a through-hole package. Verify that the gate trigger requirements align with the driving circuit's output capabilities and ensure adequate heatsinking is provided for the expected thermal dissipation.

Triacs Part Context

This part belongs to the Qxx16xHx series of high-current triacs from Littelfuse. The series is engineered for general-purpose AC power control, offering a balance of high current density and reliable switching performance in standard industrial packages.

Triacs Replacement Considerations

Consult the Littelfuse Triac Cross Reference Guide for verified equivalents. Potential substitutes may include other 400 V, 16 A triacs in TO-220 packages from manufacturers such as STMicroelectronics or ON Semiconductor, subject to pinout and parameter compatibility.

Triacs FAQ

What is the maximum operating junction temperature for the Q4016LH4?

The maximum operating junction temperature is +125°C.

Does the Q4016LH4 require a heat sink for 16 A operation?

Yes, at full rated current, thermal management via a heat sink is typically required to maintain junction temperatures within safe limits.