Q4010R4

Triacs Overview

The Littelfuse Q4010R4 is a bidirectional triac designed for AC power control applications. It features a rated repetitive peak off-state voltage (VDRM) of 400 V and an RMS on-state current (IT(RMS)) of 10 A. The device operates within a junction temperature range of -40°C to +125°C. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 50 mA. The on-state voltage is specified at 1.6 V, with a non-repetitive peak on-state current capability of 110 A or 120 A depending on the specific test condition. Leakage current in the off-state is limited to 10 µA.

Triacs Feature Summary

• Bidirectional switching capability for AC load control
• High thermal stability across extended operating temperatures
• Robust surge current handling for inductive loads

Triacs Applications

• Solid-state relays
• AC motor speed control circuits
• Lighting dimmer switches

Triacs Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to ensure correct packaging and electrical tolerances. Confirm RoHS compliance status through the latest environmental declaration. Cross-reference the part number with authorized distributors to validate authenticity and avoid counterfeit components.

Triacs Selection Notes

Select this component based on the required 400 V blocking voltage and 10 A continuous current rating. Ensure the gate drive circuit can supply the specified 50 mA trigger current. Consider the TO-220 package for adequate heat dissipation if high ambient temperatures are expected.

Triacs Part Context

This triac belongs to the Qxx10xx series from Littelfuse, which offers standardized thyristor solutions for general-purpose AC power switching. The series provides consistent performance characteristics for industrial and consumer electronics applications requiring reliable phase control.

Triacs Replacement Considerations

Check for direct substitutes such as the Q4010NH5RP or Q4010N5RP, noting differences in package type (SMTO-263 vs TO-220) and potential variations in gate sensitivity.