MAC997A8G

Triacs Overview

The MAC997A8G is a four-quadrant triac manufactured by onsemi, designed for general-purpose AC power control applications. It features an 800 V repetitive peak off-state voltage (VDRM) and supports a root-mean-square on-state current (IT(RMS)) of 0.6 A. The device operates within a junction temperature range of -40°C to +125°C and utilizes a TO-92 through-hole package. Key electrical characteristics include a maximum holding current of 10 mA and a gate trigger voltage of 2.5 V. This component serves as a robust solution for low-power switching tasks requiring high voltage blocking capabilities.

Triacs Feature Summary

• Four-quadrant triggering capability ensures reliable operation across all gate signal polarities.
• High voltage blocking rating of 800 V provides safety margin in mains-connected circuits.
• Robust thermal performance allows stable operation up to 125°C junction temperature.

Triacs Applications

• Lighting dimmers for incandescent and compatible LED loads
• Small motor speed control systems
• General purpose AC power switching modules

Triacs Procurement Notes

Verify the specific suffix 'G' indicates RoHS compliance and lead-free manufacturing status according to the manufacturer's latest documentation. Confirm that the TO-92 package dimensions match the target PCB footprint requirements. Ensure the selected supplier provides valid traceability records for industrial or automotive grade specifications if required by the end application standards.

Triacs Selection Notes

Select this component when an 800 V rating is necessary for higher noise immunity or transient tolerance compared to standard 400 V devices. The 0.6 A current rating suits low-power applications where heat dissipation in a TO-92 package is sufficient. Consider the 10 mA holding current for compatibility with microcontroller GPIO outputs that may struggle to maintain latch-up in lower-current triacs.

Triacs Part Context

The MAC997A8G belongs to the MAC97 series of planar passivated triacs from onsemi. This series is widely recognized for its reliability in consumer electronics and industrial controls. The device integrates a silicon gate structure optimized for sensitivity and ruggedness, making it a standard choice for replacing older thyristor designs in modern AC power regulation circuits.

Triacs Replacement Considerations

Direct pin-compatible replacements include the MAC97A8G and MAC97A8RL1G. Verify that substitute parts maintain the same 800 V voltage rating and TO-92 package outline. Check datasheets for any differences in gate trigger current sensitivity or dv/dt ratings to ensure circuit stability is preserved during substitution.