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The ACST12-7CG is a transient protected AC power switch from STMicroelectronics, utilizing ASD technology. It integrates a TRIAC structure with an overvoltage crowbar device to absorb inductive turn-off energy and withstand line transients per IEC 61000-4-5. Rated for 12 A RMS current and 700 V repetitive peak off-state voltage, it features a D²PAK package. The 'C' suffix indicates high static dV/dt immunity of at least 2000 V/µs. Gate triggering current is limited to 35 mA maximum.
Verify the ordering code matches ACST12-7CG for the D²PAK package variant. Confirm the 'C' designation ensures the required 2000 V/µs static dV/dt immunity level. Check datasheet thermal characteristics for appropriate heat sinking requirements based on the specific application's ambient temperature and copper surface area.
Select this component when driving medium power AC loads up to 12 A that require robust transient protection. The high dV/dt immunity makes it suitable for noisy environments or applications with fast voltage transitions. Ensure the gate driver can supply the necessary trigger current within the specified limits for reliable activation.
This part belongs to the ACS/ACST family built with Application Specific Discrete (ASD) technology. It is designed for home appliances and industrial systems where high reliability and reduced passive component count are critical. The series offers various sensitivity and package options to suit different load and environmental requirements.
Direct substitutes include other ACST12 variants such as ACST12-7CT or ACST12-7SG, provided the package type and gate sensitivity specifications align with the design requirements.