MAC9DG

Triacs Overview

The Littelfuse MAC9DG is a surface-mount Triac housed in a TO-220AB package, designed for high-performance full-wave AC control applications. It features a peak repetitive off-state voltage of 400V and an on-state RMS current rating of 8.0A at a case temperature of 100°C. The device offers a peak non-repetitive surge current of 80A and a maximum junction temperature range from -40°C to +125°C. Electrical characteristics include a typical gate trigger current of 16mA and a peak on-state voltage of 1.2V. It provides high immunity to dv/dt with a minimum of 500 V/µs at 125°C and supports a commutating di/dt of 6.5 A/ms.

Triacs Feature Summary

• Uniform gate trigger currents across three quadrants
• High immunity to dv/dt minimizing snubber network requirements
• High commutating di/dt capability
• Pb-Free and RoHS compliant construction

Triacs Applications

• Full-wave AC control circuits
• Speed controls
• Temperature modulation controls
• Lighting controls requiring noise immunity

Triacs Procurement Notes

Verify the specific part number suffix against official Littelfuse documentation to confirm voltage ratings and compliance status. Ensure that ordering specifications match the required blocking voltage and thermal management needs for the target application environment.

Triacs Selection Notes

Select the MAC9DG when a 400V blocking voltage is sufficient for the circuit design. Consider the TO-220AB package for through-hole mounting requirements. Evaluate thermal derating curves to ensure the 8.0A RMS rating is maintained under expected operating temperatures.

Triacs Part Context

The MAC9DG belongs to the MAC9xG series, which includes variants with different voltage ratings such as the MAC9MG (600V) and MAC9NG (800V). All devices share the same physical package and general electrical characteristics, differing primarily in their peak repetitive off-state voltage capabilities.

Triacs Replacement Considerations

Direct replacements within the same family include the MAC9MG and MAC9NG, provided the higher voltage ratings are acceptable. Verify pinout compatibility and thermal resistance values when substituting.