ACST1235-7G

Overview

The ACST1235-7G is a 12 A, 600 V bidirectional triac from STMicroelectronics, housed in a surface-mount TO-263 package. It features a maximum gate trigger current of 35 mA and a peak gate power dissipation of 1 W. The device operates within a junction temperature range of -40 °C to 150 °C. Key electrical parameters include a holding current of 35 mA and a peak on-state voltage of 1.5 V. The component complies with RoHS standards and is designed for general-purpose AC switching applications requiring robust performance.

Feature Summary

• Integrates a high-voltage clamping device to absorb inductive turn-off energy and withstand line transients per IEC 61000-4-5.
• Provides extremely high static dV/dt immunity of at least 2 kV/μs to ensure reliable operation under fast transient conditions.
• Complies with IEC 61000-4-4 standards for high noise immunity against fast electrical transients.

Applications

• Home appliances
• Industrial systems
• AC load driving

Procurement Notes

Verify the specific suffix 'G' against the manufacturer's official datasheet to confirm lead-free compliance and packaging details. Ensure the selected variant matches the required voltage rating and thermal management needs for the target application environment.

Selection Notes

Select this component when designing circuits that require integrated overvoltage protection without external crowbar components. The high dV/dt immunity makes it suitable for noisy industrial environments or applications driving inductive loads where standard triacs might fail to commutate correctly.

Part Context

This part belongs to the ACS/ACST power switch family built with Application Specific Discrete (A.S.D.) technology. It embeds a Triac structure combined with a high-voltage clamping device, distinguishing it from standard triacs by offering enhanced reliability and reduced passive component counts in AC switching designs.

Replacement Considerations

Direct substitutes may include other STMicroelectronics ACST12 series variants with different voltage ratings, such as the ACST1235-8FP, provided the package and current ratings are compatible. Verify pinout and thermal characteristics before substitution.