MAC228A8T

Triacs Overview

The MAC228A8T is a silicon bidirectional thyristor (TRIAC) manufactured by onsemi, designed for general-purpose AC power control applications. It features a sensitive gate structure requiring low trigger current for reliable operation with logic-level drive circuits. The device is housed in a TO-220AB through-hole package, providing robust mechanical mounting and thermal dissipation capabilities. Key electrical characteristics include an RMS on-state current of 8 A and a repetitive peak off-state voltage rating of 600 V. The component operates within a junction temperature range of -40°C to +110°C, ensuring stability across various industrial and consumer environments.

Triacs Feature Summary

• Sensitive gate architecture enabling direct interface with microcontrollers and logic circuits
• High surge current capability for handling inductive load turn-on transients
• Robust TO-220AB leaded package for efficient heat transfer and secure PCB mounting

Triacs Applications

• Solid-state relays for industrial switching
• Lighting dimmer circuits for residential and commercial use
• Motor speed control systems for small appliances

Triacs Procurement Notes

Verify the specific suffix 'T' against the official onsemi datasheet to confirm tape-and-reel packaging specifications. Confirm RoHS compliance status as manufacturing sources may vary. Validate that the 600V voltage rating aligns with the system's peak line voltage requirements. Ensure the TO-220AB footprint matches the design layout. Check for any recent Product Change Notifications regarding pinout or material composition updates.

Triacs Selection Notes

Select this component when a 600V blocking voltage and 8A continuous current are required in a standard through-hole format. The sensitive gate characteristic makes it suitable for applications driven by low-power logic outputs without additional driver stages. Consider thermal management solutions if operating near the maximum current limit in enclosed spaces. Compare against higher voltage variants if system transients exceed 600V.

Triacs Part Context

The MAC228 series represents a family of general-purpose TRIACs widely used in AC power switching. The MAC228A8T specifically denotes the 600V variant within this lineup. This part is commonly found in legacy designs and cost-sensitive consumer electronics where through-hole reliability is prioritized over surface-mount density. It serves as a fundamental building block for basic phase-control circuits.

Triacs Replacement Considerations

Direct replacements include the MAC228A8G from Littelfuse, which shares identical electrical ratings and pinout. Other compatible alternatives may include the BTB08-600BWR from STMicroelectronics, provided the gate sensitivity and thermal characteristics meet the application requirements.