ACST830-8FP

Overview

The ACST830-8FP is an overvoltage-protected triac from the ACST8 series by STMicroelectronics, designed for AC switching applications. It features a static dV/dt greater than 2000 V/µs and an RMS current of 8 A with a rated repetitive off-state voltage of 800 V. The device operates in a TO-220-3 FP package with through-hole mounting. Key electrical parameters include a maximum holding current of 30 mA, a gate trigger voltage of 1 V, and a gate trigger current of 30 mA. It offers high noise immunity and eliminates the need for external MOV or snubber circuits.

Feature Summary

• Integrates a high-voltage clamping device to absorb inductive turn-off energy and withstand line transients per IEC 61000-4-5 standards.
• Provides high static dV/dt immunity exceeding 2000 V/µs to ensure reliable operation against fast transient bursts as defined in IEC 61000-4-4.
• Features UL certified insulation rated at 2000 V RMS, complying with UL1557 standards for safety isolation.

Applications

• Home appliances requiring direct microcontroller drive for resistive or inductive loads.
• Industrial systems needing robust AC switching with integrated overvoltage protection.
• Motor control applications driving induction motors up to 8 A without external snubber networks.

Procurement Notes

Verify component authenticity by checking the manufacturer's marking code and date code against official STMicroelectronics documentation. Ensure the TO-220-3 FP package matches the specified pinout and thermal characteristics. Confirm RoHS compliance status through the latest datasheet revision. Request test reports if specific electrical parameter tolerances are critical for your design validation process.

Selection Notes

Select this component when designing AC power switches that require inherent overvoltage protection to simplify circuit topology. It is suitable for applications where space constraints prevent the use of external MOVs or RC snubber networks. Consider the 8 A RMS current rating and 800 V blocking voltage to ensure adequate margin for your specific load requirements and line voltage conditions.

Part Context

This device belongs to the ACST8 family of power switches built on Application Specific Discrete (A.S.D.) technology. The series combines standard triac functionality with integrated high-voltage clamping capabilities. This integration allows for reduced bill of materials and improved system reliability in environments subject to electrical noise and voltage spikes common in residential and industrial settings.

Replacement Considerations

Check for ACST830 variants with different suffixes indicating package or temperature range changes. Verify compatibility with existing PCB footprints if substituting with other TO-220-3 FP devices. Ensure any replacement maintains the same 2000 V RMS insulation rating and overvoltage protection specifications to preserve system safety certifications.