MAC8SMG

Triacs Overview

The Littelfuse MAC8SMG is a sensitive gate triac rated for 600 V peak repetitive off-state voltage and 8.0 A RMS on-state current at 70°C case temperature. It supports a non-repetitive surge current of 70 A and operates within a junction temperature range of -40°C to +110°C. The device features uniform gate trigger currents across quadrants Q1, Q2, and Q3, with maximum values for IGT (5 mA), VGT (1.5 V), and IH (10 mA) specified for design ease. Packaged in a rugged TO-220AB format, it offers high immunity to dv/dt (minimum 25 V/µs at 110°C) and commutating di/dt (minimum 8.0 A/ms at 110°C).

Triacs Feature Summary

• Sensitive gate architecture enables direct triggering by microcontrollers and logic circuits.
• Uniform gate trigger characteristics provided across three operating quadrants (Q1, Q2, and Q3).
• High immunity to rate of rise of off-state voltage and commutating current for robust switching.

Triacs Applications

• Full wave control of AC loads in industrial applications.
• Appliance controls and heater regulation systems.
• Motor control circuits and general power switching applications.

Triacs Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package style and compliance status. Confirm thermal management requirements align with the specified junction-to-case resistance. Ensure gate drive circuits meet the maximum trigger voltage and current limits defined in the electrical characteristics table.

Triacs Selection Notes

Select this component when a 600 V blocking capability is required alongside an 8 A RMS current rating. The sensitive gate feature simplifies driver circuit design compared to standard gate devices. Verify that the application's peak transient voltages remain below the 600 V rating and that heat sinking allows operation within the +110°C junction limit.

Triacs Part Context

The MAC8SMG belongs to the MAC8SxG series, which includes variants with different voltage ratings such as the MAC8SDG (400 V) and MAC8SNG (800 V). All members share identical current ratings, package dimensions, and sensitive gate characteristics, allowing for pin-compatible design flexibility based on voltage requirements.

Triacs Replacement Considerations

Direct functional substitutes within the same family include the MAC8SDG and MAC8SNG, provided the system voltage does not exceed their respective 400 V or 800 V ratings. Cross-brand replacements must match the 8 A RMS current, 600 V blocking voltage, and TO-220AB package constraints.