Q2006LH4

Triacs Overview

The Littelfuse Q2006LH4 is a bidirectional triac designed for AC power control applications. It features a rated repetitive off-state voltage (VDRM) of 600 V and an on-state RMS current (IT(RMS)) of 6 A. The device operates within a temperature range of -40 °C to +125 °C and utilizes a TO-220AB through-hole package with an isolated case connection. Key electrical parameters include a maximum holding current of 35 mA, a gate trigger voltage of 1.5 V, and a gate trigger current of 35 mA. It exhibits a typical on-state voltage of 1.6 V and a maximum leakage current of 10 µA at rated voltage.

Triacs Feature Summary

• Provides reliable AC power switching capabilities in a compact through-hole form factor.
• Features an isolated case connection for safe mounting to heat sinks or chassis.
• Designed for high-reliability operation across a wide industrial temperature range.

Triacs Applications

• AC motor speed control circuits
• Solid-state relay designs
• Lighting dimmer applications

Triacs Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm pinout and thermal characteristics. Ensure the procurement channel provides original Littelfuse documentation to validate RoHS compliance and UL recognition status before integration into final assemblies.

Triacs Selection Notes

Select this component when a 600 V blocking voltage and 6 A continuous current rating are required for AC load switching. The TO-220AB package facilitates efficient thermal management compared to smaller surface-mount alternatives, making it suitable for applications requiring robust heat dissipation without complex PCB layout constraints.

Triacs Part Context

This part belongs to the Qxx06xxH series of triacs from Littelfuse, which are engineered for general-purpose AC power control. The series offers a balance of high voltage blocking capability and moderate current handling, widely utilized in consumer electronics and industrial equipment where reliable phase-angle control is necessary.

Triacs Replacement Considerations

Direct replacements may include other 600 V, 6 A triacs in TO-220 packages such as the BT139 series or equivalent devices from manufacturers like STMicroelectronics or Vishay, provided gate trigger specifications and thermal resistance values are compatible with the existing design.

Triacs FAQ

What is the maximum non-repetitive peak on-state current for the Q2006LH4?

The device supports a non-repetitive peak on-state current of 80 A for half-sine wave pulses and 85 A for square wave pulses, as specified in the technical data.

Is the case connection electrically isolated?

Yes, the Q2006LH4 features an isolated case connection, allowing the device to be mounted directly to a heatsink or chassis without requiring additional insulating hardware.

What is the critical rate of rise of off-state voltage (dv/dt)?

The minimum critical rate of rise of off-state voltage is specified at 425 V/µs, ensuring immunity to false triggering due to rapid voltage transients.