ACST410-8BTR

Overview

The ACST410-8BTR is a bidirectional triac from STMicroelectronics, rated for 4 A RMS current and packaged in a surface-mount TO-252 (DPAK-3) configuration. It features an integrated high-voltage clamping device to absorb inductive turn-off energy and withstand line transients compliant with IEC 61000-4-5 standards. The device requires a low gate trigger current of less than 10 mA for activation while maintaining high electrical noise immunity per IEC 61000-4-4 fast transient burst tests. It offers static dV/dt immunity exceeding 1000 V/μs and operates within a junction temperature range suitable for general AC switching applications.

Feature Summary

• Integrates a Triac structure with an embedded high-voltage clamping device to manage inductive loads and line transients without external protection components.
• Provides high electrical noise immunity against fast transient bursts as defined by IEC 61000-4-4 standards.
• Requires low gate trigger current for activation, enabling direct drive from microcontrollers or logic circuits.

Applications

• Home appliance motor control
• Industrial system load driving
• AC inductive load switching

Procurement Notes

Verify the specific ordering suffix 'BTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component meets all relevant safety certifications for the intended end-use environment. Ensure compatibility with the host circuit's voltage and current ratings before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring robust transient suppression and high noise immunity for AC loads up to 4 A. The integrated overvoltage protection simplifies the bill of materials by eliminating the need for external snubber networks or varistors. Consider the TO-252 package for space-constrained surface-mount designs where thermal performance and reliability are critical.

Part Context

This part belongs to the ACST4 series within STMicroelectronics' ACS/ACST power switch family. These devices are engineered for home appliances and industrial systems, offering enhanced reliability through planar technology. The series combines standard Triac functionality with built-in protection features to improve system durability against electrical stress.

Replacement Considerations

Check for alternative parts within the ACST4 series or other STMicroelectronics Triac families that offer similar current ratings and integrated protection. Verify pinout compatibility and thermal characteristics if substituting with components from different manufacturers to ensure seamless integration into existing PCB layouts.