Q4004L352

Triacs Overview

The Littelfuse Q4004L352 is a Quadrac device, which integrates 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. The component features a rated average on-state current (Irms) of 4 A and a repetitive peak reverse voltage of 400 V. Key electrical parameters include a maximum gate trigger current (Igt) of 10 mA, a maximum gate trigger voltage (Vgt) of 1.3 V, and a surge current rating of 55 A at 60 Hz. The device operates within a temperature range of -40°C to 125°C and includes glass-passivated junctions for reliability.

Triacs Feature Summary

• Integrated Diac Trigger: Combines a triac and diac in one package to eliminate external components and assembly time.
• Noise Immunity: Designed for applications requiring high noise immunity during AC switching and phase control.
• Electrical Isolation: The TO-220 package provides electrical isolation from the leads to the mounting surface.

Triacs Applications

• AC speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the specific suffix '352' against official Littelfuse documentation to confirm exact pinout or packaging variations. Ensure the selected part matches the required voltage and current ratings for the target circuit design before procurement.

Triacs Selection Notes

Select this component for AC phase control circuits where integrated triggering simplifies the design. Consider the 400 V blocking voltage and 4 A current capacity relative to the load requirements. Verify thermal management needs given the TO-220 package and operating temperature limits.

Triacs Part Context

The Q4004L352 belongs to the QxxxxLTx series of Teccor brand Quadrac devices manufactured by Littelfuse. These devices are engineered to replace discrete triac and diac combinations, offering a compact solution for AC power control applications with enhanced reliability due to glass-passivated junctions.

Triacs Replacement Considerations

Direct replacements must be Quadrac devices with similar current and voltage ratings. Check datasheets for compatible packages and electrical characteristics to ensure functional equivalence in existing designs.

Triacs FAQ

What is the primary advantage of using a Quadrac device like the Q4004L352?

It integrates a diac trigger inside the same package as the triac, saving assembly time and cost by eliminating the need for a discrete diac.

Is the Q4004L352 suitable for high-noise environments?

Yes, it is designed for AC switching and phase control applications where noise immunity is required.