ST enhances AC motor switches

Geneva—STMicroelectronics has unveiled the ACST4, ACST6 and ACST8 families of AC switches that are designed to control appliance motors.

The latest-generation ACST4, ACST6 and ACST8 switches include a power triac delivering enhanced commutation performance to turn the motor off without requiring external components to suppress voltage transients and to ensure reliable switching. Unlike conventional triacs, the switches also integrate protection against surge voltages up to 2kV on the AC line, in accordance with the international IEC 61000-4-5.

In addition, the ACST410 and ACST610 switches have a low trigger current of 10mA, allowing direct control by a CMOS device such as a microcontroller without requiring a buffer or driver. The ACST435 and ACST830 are high-immunity devices specifying noise immunity of at least 1000V and 2000V per microsecond, respectively, complying with the IEC 61000-4-4 fast transient burst test and eliminating any need for conditioning of the trigger signal.

4A (ACST4), 6A (ACST6) or 8A (ACST8) maximum on-state current 800V blocking voltage 100A per microsecond turn-on rate TO-220FPAB (full-pack) package, 1500Vrms insulation Surface-mount DPAK and D²PAK packages also available

The ACST4, ACST6 and ACST8 families consist of 14 part numbers in total.

Pricing: From $0.70 in quantities of 10,000.
Availability: Now.
Datasheets: Click here.


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