ACS302-5T3-TR

Overview

The STMicroelectronics ACS302-5T3 is a three-line AC switch array built on the ASD™ concept, designed for static switching in appliance and industrial control systems. It integrates three bidirectional AC switches capable of controlling resistive or inductive loads up to 0.2 A per line, with a total nominal conducting current of 0.4 A for the array. The device features a repetitive peak off-state voltage (VDRM/VRRM) of 500 V and a clamping voltage (VCL) of 600 V. Gate triggering requires a negative current with IGT less than 5 mA. Packaged in an SO-20 wired configuration, it interfaces directly with microcontrollers while eliminating gate kickback stress.

Feature Summary

• Integrates high-voltage clamping structures to absorb inductive turn-off energy without external protection components.
• Includes gate level shifter drivers to isolate digital controllers from main switch voltages.
• Array structure simplifies design, increases reliability, and saves space compared to discrete solutions.
• Capable of meeting IEC61000-4-5 standards for surge immunity and IEC335-1 safety requirements.

Applications

• Washing machines, dishwashers, tumble dryers, refrigerators, water heaters, and cookware.
• Driving low-power high-inductive or resistive loads such as relays, valves, solenoids, dispensers, pumps, fans, micro-motors, door locks, and low-power lamp bulbs.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the SO-20 outline specifications. Check manufacturing date codes and lot traceability records to ensure compliance with RoHS3 directives. Review datasheet revisions for any updates to electrical characteristics or thermal resistance values prior to final procurement validation.

Selection Notes

Select this component when designing circuits requiring isolated control of multiple low-power AC loads from a single microcontroller interface. Ensure the load current does not exceed 0.2 A per channel or 0.4 A total RMS under specified ambient temperatures. Verify that the system can accommodate the negative gate trigger current requirement and that the PCB layout supports the SO-20 thermal dissipation needs for continuous operation.

Part Context

The ACS302-5T3 belongs to STMicroelectronics' AC line switch family utilizing the ASD™ technology. It serves as a specialized integrated solution for replacing discrete triac and protection networks in household appliances. The device consolidates switching, clamping, and isolation functions into a single surface-mount package, reducing bill-of-materials complexity and assembly footprint in multi-channel AC control applications.

Replacement Considerations

Public confirmed substitute part numbers: ACS102-6T1-TR

FAQ

How is the ACS302-5T3 triggered?

Each switch is triggered by a negative gate current flowing out of the gate pin, allowing direct interfacing with digital controllers through a resistor.

What happens during inductive turn-off?

The internal avalanche diode conducts the stored inductive energy, limiting the voltage across the switch to the clamping voltage (VCL) until the current reaches zero.

Does the device require external overvoltage protection?

No, the device includes built-in high-voltage clamping structures that absorb inductive turn-off energy and withstand AC line transients up to 2 kV according to IEC61000-4-5 standards.