ACST310-8BTR

Overview

The ACST310-8BTR is a surface-mount bidirectional triac switch manufactured by STMicroelectronics in the TO-252 (DPAK) package. It features an RMS on-state current rating of 3 A and a repetitive peak off-state voltage of 800 V. The device supports a non-repetitive surge current of 21 A with a maximum holding current of 20 mA. Gate triggering parameters include a maximum gate trigger current of 10 mA and a maximum gate trigger voltage of 1.1 V. The component operates within a temperature range of -40°C to +125°C, with a peak on-state voltage of 1.7 V and a peak gate power dissipation of 10 W.

Feature Summary

• Integrates a high-voltage clamping device to absorb inductive turn-off energy and withstand line transients compliant with IEC 61000-4-5 standards.
• Features sensitive gate architecture enabling direct drive from microcontrollers with low gate current requirements.
• Provides improved commutating dV/dt and dI/dt performance compared to standard triacs.

Applications

• Washing machine drum motor control
• Refrigerator compressor control
• Dishwasher pump motor control

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm pinout configuration and packaging specifications. Ensure that any variations in suffix codes do not alter the electrical characteristics or thermal resistance values defined in the datasheet before finalizing procurement orders.

Selection Notes

Select this component for applications requiring robust overvoltage protection without external MOVs or snubber circuits. The 800 V rating and integrated transient absorption make it suitable for industrial systems and home appliances driving loads up to 3 A where space efficiency and noise immunity are critical design constraints.

Part Context

This part belongs to the ACST series of overvoltage protected AC switches built with ASD technology. It serves as a rugged alternative to conventional triacs, offering enhanced reliability in appliance and industrial environments by embedding both triac structures and high-voltage clamping devices within a single package.

Replacement Considerations

ACST310-8B is a compatible leaded variant within the same family. Verify package compatibility and thermal management requirements when substituting between surface-mount DPAK and through-hole configurations.

FAQ

Does the ACST310-8BTR require external snubber circuits?

No, the integrated high-voltage clamping device allows the component to withstand line transients and absorb inductive turn-off energy, eliminating the need for external MOVs or RC networks.

What is the maximum gate trigger current for this device?

The maximum gate trigger current (Igt) is 10 mA, allowing direct drive from standard microcontroller outputs.