MAC997B8G

Triacs Overview

The MAC997B8G is a silicon bidirectional thyristor (TRIAC) manufactured by onsemi, designed for logic-level gate triggering applications. It features a sensitive gate structure that allows direct interfacing with standard logic families such as TTL and CMOS without requiring external buffer components. The device is housed in a TO-92 (CASE 29-11) three-pin package. Key electrical specifications include a maximum RMS on-state current of 0.8 A and a repetitive peak off-state voltage of 600 V. The component supports four-quadrant triggering and exhibits a maximum DC gate trigger current of 5 mA and a gate trigger voltage of 2 V.

Triacs Feature Summary

• Sensitive gate architecture enabling direct drive from low-power logic circuits
• Four-quadrant triggering capability for reliable switching across all gate polarities
• Robust thermal performance suitable for compact through-hole mounting

Triacs Applications

• Lighting control systems including dimmers and soft starters
• Solid-state relay modules for AC load switching
• Temperature regulation circuits for heating elements

Triacs Procurement Notes

Verify the specific ordering suffix to confirm packaging format and environmental compliance status. Ensure the selected variant matches the required lead-free or tin/lead termination specifications for the target assembly process. Cross-reference the manufacturer's latest datasheet to confirm active production status and any recent design changes before finalizing procurement.

Triacs Selection Notes

Select this component when an application requires a TRIAC with a 0.8 A current rating and 600 V blocking voltage. The sensitive gate characteristic makes it appropriate for designs utilizing microcontrollers or logic gates with limited output current capabilities. Verify that the circuit's dv/dt requirements are within the specified 20 V/us limit to prevent false triggering during operation.

Triacs Part Context

This part belongs to the MAC997 series of sensitive gate TRIACs produced by onsemi. The 'G' suffix typically denotes a lead-free and halogen-free compliant version of the standard MAC997B8 device. The series is widely used in consumer electronics and industrial controls where small form factor and logic compatibility are prioritized over high current handling.

Triacs Replacement Considerations

Direct pin-compatible substitutes include the MAC997B8 and MAC997B8RLRPG. When substituting, verify that the alternative device maintains the same 0.8 A RMS current rating and 600 V voltage class. Confirm that the gate trigger characteristics of the replacement part match the original design constraints.