MAC997A6

Triacs Overview

The MAC997A6 is a sensitive gate silicon bidirectional thyristor (Triac) manufactured by onsemi, designed for AC load switching in consumer and light industrial applications. It features a four-quadrant logic-level trigger capability, ensuring reliable operation across all combinations of gate drive polarities. The device supports a maximum repetitive peak reverse voltage of 400 V and an RMS on-state current of 800 mA. Key electrical parameters include a non-repetitive peak on-state current of 8 A, a holding current maximum of 10 mA, and a gate trigger voltage up to 2.5 V. It operates within a junction temperature range of -40°C to +110°C and is housed in a TO-92-3 through-hole package.

Triacs Feature Summary

• Sensitive gate triggering optimized for MPU interfaces, TTL logic, and solid state relays
• Four-quadrant logic level compatibility for versatile gate drive source combinations
• Improved noise immunity with high commutating di/dt performance at elevated temperatures

Triacs Applications

• Solid state relay (SSR) implementations
• Microprocessor unit (MPU) interface circuits
• TTL logic controlled AC switching loads
• Light industrial and consumer appliance control systems

Triacs Procurement Notes

Verify the specific suffix code (e.g., RL1, RLRP) against the manufacturer's current datasheet to confirm pinout and packaging details. Ensure the selected variant meets RoHS compliance requirements if applicable to the target assembly. Cross-reference the exact part number with official distributor catalogs to confirm availability status and lead times prior to finalizing procurement plans.

Triacs Selection Notes

Select this component for low-power AC control applications requiring direct interfacing with digital logic gates or microcontrollers. The sensitive gate characteristic allows for lower drive currents compared to standard Triacs. Verify that the load current remains within the 800 mA RMS limit and that the circuit includes adequate snubber networks to manage dv/dt stress during switching transitions.

Triacs Part Context

This device belongs to the MAC997 series of sensitive gate Triacs from onsemi. It shares functional similarities with other logic-level Thyristors but is specifically engineered for cost-effective, automatic insertion packaging. The TO-92 form factor distinguishes it from higher-power surface-mount or larger through-hole alternatives in the broader thyristor family.

Triacs Replacement Considerations

Direct substitutes include the MAC997A6RL1 and MAC997A6RLRP variants from onsemi, which share identical electrical characteristics. Other manufacturers offer compatible parts such as the BT134W from NXP Semiconductors, provided voltage and current ratings align with the design requirements.