Q4015L555

Triacs Overview

The Littelfuse Q4015L555 is a Teccor brand Quadrac device, which integrates a triac and a diac trigger within a single package. It serves as a bidirectional AC switch for phase control applications. The component features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (ITRMS) of 15 A. Key electrical parameters include a gate trigger current (IGT) of 50 mA, a holding current (IH) maximum of 70 mA, and an on-state voltage (VTM) of 1.6 V. It operates within a temperature range of -40°C to +125°C and utilizes a TO-220-2 through-hole package.

Triacs Feature Summary

• Integrated Diac Trigger: Combines a triac and diac in one package to eliminate external components and assembly time.
• High Voltage Isolation: Provides 2500 V rms isolation between leads and the mounting surface without external insulators.
• Noise Immunity: Designed for AC switching and phase control where noise immunity is required.

Triacs Applications

• AC speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm pinout and isolation ratings. Ensure the selected variant matches the required thermal management for the TO-220 package. Confirm RoHS compliance status via the manufacturer's latest datasheet before integration into designs requiring environmental standards.

Triacs Selection Notes

Select this component for applications requiring integrated gate triggering to simplify circuit design. The 15A current rating suits moderate power AC loads. Consider the 400V voltage rating for standard line voltage applications. Verify that the TO-220 package fits the available board space and thermal constraints.

Triacs Part Context

This part belongs to the QxxxxLTx series of Teccor Quadrac devices. These devices are designed to replace discrete triac and diac combinations. The series offers various current and voltage ratings in TO-220 packages, providing electrically isolated solutions for AC control applications.

Triacs Replacement Considerations

Direct substitutes may include other Quadrac devices from the same series with matching current and voltage ratings. Verify pin compatibility and isolation requirements when considering alternatives from different manufacturers.