ACST1235-7T

Overview

The ACST1235-7T is a bidirectional triac switch from STMicroelectronics, designed for AC power control applications. It features an integrated overvoltage crowbar protection mechanism to safeguard connected loads. The device operates with a maximum repetitive peak off-state voltage of 600V and supports an RMS on-state current rating of 12A. Key electrical parameters include a maximum gate trigger current of 35mA and a minimum static dV/dt immunity of 2 kV/µs. It is housed in a TO-263 surface-mount package with three pins, suitable for automated assembly processes.

Feature Summary

• Integrates overvoltage crowbar technology for enhanced load protection
• Provides high static dV/dt immunity to prevent false triggering
• Utilizes ASD (Advanced Snubberless Design) technology for reliable switching

Applications

• Solid-state relays
• Motor speed controllers
• Lighting dimmers

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration as per official documentation. Confirm that the component is currently available or check obsolescence status, as some sources indicate scheduled discontinuation. Ensure compatibility with the intended PCB footprint for the TO-263 package before finalizing procurement orders.

Selection Notes

Select this component when overvoltage protection is required within the triac circuit without external crowbar components. Choose based on the 12A current rating and 600V voltage capability. Consider the surface-mount TO-263 package for space-constrained designs requiring automated placement.

Part Context

This part belongs to the ACST1235 series of overvoltage protected AC switches. It shares functional similarities with other devices in the family but is distinguished by its specific gate trigger characteristics and packaging options. The series is designed for robust AC switching in consumer and industrial electronics.

Replacement Considerations

Check for direct substitutes within the ACST1235 series such as ACST1235-8FP for through-hole variants. Verify pinout and thermal characteristics if replacing with non-STMicroelectronics equivalents.