ACST8 is a high performance overvoltage protected AC switch produced by STMicroelectronics. It is suitable for home appliances and industrial systems and can drive an induction motor up to 8A. This document provides a detailed introduction of the features of ACST8, including high noise immunity, no need for external overvoltage protection, and the need for fewer power passive components.
The ACST8 is a high-performance overvoltage protected AC switch belonging to the ACS™/ACST power switch family. It utilizes A.S.D.® (application specific discrete) technology to embed a Triac structure with a high voltage clamping device. This design allows the device to absorb inductive turn-off energy and withstand line transients described in IEC 61000-4-5 standards without needing external overvoltage protection.
The device is suitable for home appliances and industrial control systems, capable of driving medium power AC loads such as universal motors in washing machines and compressors for refrigerators or air conditioners. It offers high noise immunity complying with IEC 61000-4-4 standards and is available in TO-220FPAB, TO-220AB, and D?PAK packages.
| Repetitive peak off-state voltage | 800 V |
|---|---|
| Gate trigger current | 30 mA |
| Insulation rms voltage (TO-220FPAB) | 1500 V |
| Static dV/dt immunity | > 2000 V/us |
No, the device embeds a Triac structure with a high voltage clamping device to absorb inductive turn off energy, so it needs no external overvoltage protection.
It complies with IEC 61000-4-5 for overvoltage protection and IEC 61000-4-4 for high immunity against fast transients.