MAC997A8

Triacs Overview

The MAC997A8 is a sensitive gate four-quadrant triac manufactured by onsemi, designed for direct interfacing with microcontrollers and logic circuits. It features a rated repetitive peak off-state voltage of 600 V and an RMS on-state current of 0.6 A. The device supports a non-repetitive peak on-state current of 8 A and operates within a junction temperature range up to +125 °C. Key electrical parameters include a maximum holding current of 10 mA, a gate trigger voltage of 2 V, and a gate trigger current of 5 mA. It is housed in a TO-92 (TO-226AA) three-pin package.

Triacs Feature Summary

• Sensitive gate architecture enabling direct interface with low-power logic and microcontrollers
• Four-quadrant triggering capability for reliable switching across all gate polarities
• Planar passivated construction for enhanced durability and stability

Triacs Applications

• General purpose bidirectional switching
• Phase control applications
• Solid state relays

Triacs Procurement Notes

Verify the specific manufacturer suffix against official datasheets to confirm pinout compatibility and exact electrical tolerances. Ensure the component source provides valid RoHS compliance documentation. Cross-reference the part number with authorized distributors to avoid counterfeit inventory. Confirm that the TO-92 package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Triacs Selection Notes

Select this component when a 600 V blocking voltage and 0.6 A continuous current rating are required in a compact through-hole package. The sensitive gate specification makes it suitable for driving directly from CMOS or TTL logic outputs without additional buffer circuitry. Consider thermal management constraints as the TO-92 package has limited heat dissipation capabilities compared to larger industrial packages.

Triacs Part Context

This part belongs to the MAC97/MAC99 series of sensitive gate triacs from onsemi. It shares functional similarities with the MAC97A8 but may differ in specific gate sensitivity thresholds or manufacturing revisions. The MAC997 series is widely used in consumer electronics where space-saving TO-92 packaging is preferred over surface-mount alternatives.

Triacs Replacement Considerations

The MAC97A8 is a documented alternative offering identical 600 V and 0.6 A ratings in the same TO-92 package. Verify gate trigger current specifications between manufacturers to ensure logic compatibility.