QK025L6

Triacs Overview

The Littelfuse QK025L6 is a bidirectional triac designed for high-voltage power control applications. It features a rated repetitive off-state voltage (VDRM) of 1 kV and an RMS on-state current (It RMS) of 25 A. The device operates within a junction temperature range of -40°C to +125°C and is housed in an isolated TO-220AB package with three pins. Key electrical characteristics include a maximum gate trigger current (Igt) of 80 mA, a gate trigger voltage (Vgt) of 1.3 V, and a holding current (Ih) of 100 mA. The on-state voltage drop is specified at 1.8 V, while the off-state leakage current remains at 20 uA under rated conditions.

Triacs Feature Summary

• High voltage blocking capability suitable for demanding industrial environments
• Isolated flange mount construction for safe thermal management
• Robust switching performance with defined gate drive requirements

Triacs Applications

• Industrial motor speed control systems
• Solid-state relays for AC load switching
• High-power lighting dimmer circuits

Triacs Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified supply chain partners. Confirm that the specific part number matches the required voltage and current ratings for the target application. Ensure compliance with relevant safety standards and environmental regulations applicable to the deployment region before finalizing procurement orders.

Triacs Selection Notes

Select this component when a 1 kV rating and 25 A continuous current capacity are required in a standard TO-220 form factor. Consider the 80 mA gate trigger requirement for driver circuit compatibility. Evaluate thermal dissipation needs based on the 1.8 V on-state voltage drop and expected load currents to ensure reliable operation within the specified temperature limits.

Triacs Part Context

This triac belongs to the Qxx25xx series from Littelfuse, which focuses on high-reliability thyristor solutions. The QK025L6 specifically targets applications requiring robust isolation and high voltage handling. It serves as a core switching element in power electronics where precise control of AC power is necessary for industrial machinery and equipment.

Triacs Replacement Considerations

Direct replacements must match the 1000V VDRM, 25A It RMS, and TO-220AB isolated package specifications. Verify equivalent gate trigger parameters and thermal resistance values to ensure circuit compatibility without redesigning the driving logic or heatsinking infrastructure.