MAC8SDG

Triacs Overview

The Littelfuse MAC8SDG is a sensitive gate triac housed in a TO-220AB package. It features an 8.0 A RMS on-state current rating at 70°C and a peak non-repetitive surge current of 70 A. The device supports a maximum repetitive off-state voltage (VDRM) of 400 V. Key electrical parameters include a peak on-state voltage of 1.85 V, a maximum holding current of 10 mA, and a maximum gate trigger current of 5.0 mA. It operates within a junction temperature range of -40°C to +110°C.

Triacs Feature Summary

• Sensitive gate design enables triggering by microcontrollers and logic circuits
• Uniform gate trigger currents specified across quadrants Q1, Q2, and Q3
• High immunity to dv/dt with a minimum of 25 V/µs at 110°C
• High commutating di/dt capability of 8.0 A/ms minimum at 110°C

Triacs Applications

• Appliance controls
• Heater controls
• Motor controls
• Power switching applications

Triacs Procurement Notes

Verify the specific part number suffix against official Littelfuse documentation to confirm the exact blocking voltage rating. The 'D' suffix indicates a 400 V rating, while other suffixes like 'M' or 'N' correspond to different voltage levels. Ensure the procurement order matches the required voltage specification for the intended circuit design.

Triacs Selection Notes

Select this component when designing AC load control circuits requiring reliable triggering from low-power logic sources. The sensitive gate characteristic reduces the drive current requirements compared to standard gate devices. Consider the thermal resistance and derating curves for high ambient temperature environments to ensure the junction temperature remains within the specified operating range.

Triacs Part Context

The MAC8SDG belongs to the MAC8SxG series of thyristors manufactured by Littelfuse. This series includes variants with different voltage ratings, distinguished by the middle letter in the part number. The MAC8SDG specifically denotes the 400 V version within this family of surface-mount capable, TO-220 packaged triacs designed for industrial and consumer applications.

Triacs Replacement Considerations

MAC8SMG (600 V), MAC8SNG (800 V). Verify voltage ratings match application requirements before substitution.