Q6008LT

Triacs Overview

The Littelfuse Q6008LT is a Teccor Quadrac device, integrating a triac and a diac trigger within a single TO-220 package. It serves as a bidirectional AC switch with gate control for either polarity of main terminal voltage. Key electrical parameters include an on-state RMS current (Itrms) of 8 A, a rated repetitive peak off-state voltage (VDRM) of 600 V, and a breakover voltage range of 33 V to 43 V. The device features a maximum on-state voltage (VTM) of 1.6 V, a non-repetitive peak on-state current (ITSM) of 83 A at 60 Hz, and a maximum holding current (IH) of 50 mA. It operates within a junction temperature range of -40°C to +125°C.

Triacs Feature Summary

• Integrated Diac Trigger: Combines a triac and diac in one package to eliminate discrete component assembly.
• Electrical Isolation: TO-220 package provides 2500 V rms isolation from leads to mounting surface.
• Noise Immunity: Designed for applications requiring high noise immunity in AC switching.
• Glass-Passivated Junctions: Ensures long-term device reliability and parameter stability.

Triacs Applications

• AC speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the specific suffix against the official Littelfuse datasheet to confirm exact electrical characteristics, as variations exist within the QxxxxLTx series. Confirm RoHS compliance status and REACH SVHC declarations prior to integration. Ensure the TO-220 thermal management requirements are met for the intended operating environment.

Triacs Selection Notes

Select this component when phase control or AC switching requires integrated triggering without external snubber networks. Compare the 8 A current rating and 600 V blocking capability against load requirements. Consider the TO-220 package for through-hole mounting and heat dissipation needs relative to alternative surface-mount options.

Triacs Part Context

The Q6008LT belongs to the Teccor QxxxxLTx series of Quadrac devices manufactured by Littelfuse. These devices are engineered to simplify circuit design by replacing separate triac and diac components. The series offers various current and voltage ratings packaged in TO-220 formats for industrial and consumer power control applications.

Triacs Replacement Considerations

Direct substitutes may include other Triac-Diac combinations such as the BT137 paired with a DB3 diac, provided electrical ratings match. Verify pinout compatibility and thermal resistance values before substituting with generic thyristors.

Triacs FAQ

What is the primary advantage of the Q6008LT over a standard triac?

It integrates a diac trigger inside the same package, eliminating the need for external discrete diac components and reducing assembly time.

Does the Q6008LT require an external snubber network?

No, the Quadrac device eliminates the need for a snubber network, simplifying the circuit design.

What is the isolation voltage of the TO-220 package?

The package is electrically isolated to 2500 V rms from the leads to the mounting surface.