QK010R4

Triacs Overview

The Littelfuse QK010R4 is a bidirectional triac designed for power control applications. It features a rated repetitive off-state voltage (VDRM) of 1 kV and an RMS on-state current (IT(RMS)) of 10 A. The device exhibits a low on-state voltage of 1.6 V and a maximum holding current of 25 mA. Gate trigger parameters include a voltage of 2.5 V and a current range of 25 mA to 75 mA. It operates within a temperature range of -40°C to +125°C and is housed in a TO-220-2 package.

Triacs Feature Summary

• High voltage blocking capability suitable for mains-powered circuits
• Low on-state voltage for improved efficiency
• Robust thermal performance across wide operating temperatures

Triacs Applications

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

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation, as variations like QK010R4TP indicate tube packaging. Confirm RoHS compliance status through the manufacturer's latest datasheet or environmental declaration before integration into regulated products.

Triacs Selection Notes

Select this component when a 1000V rating and 10A continuous current are required in a through-hole package. Ensure gate drive circuits can supply at least 25 mA to guarantee reliable triggering under all load conditions and temperature extremes.

Triacs Part Context

This part belongs to the Qxx10xx series of high-voltage triacs from Littelfuse. The series is engineered for general-purpose AC switching, offering a balance of high voltage handling and moderate current capacity in standard industrial packages.

Triacs Replacement Considerations

Check for direct equivalents such as the QK010N5TP if higher gate sensitivity is needed, though pinout and voltage ratings must be verified against the original design requirements.