ACS102-5TA

Overview

The ACS102-5TA is a TO-92 packaged AC line switch from the ASD™ family, designed for static switching in appliance and industrial control systems. It features a repetitive peak off-state voltage (VDRM/VRRM) of 500 V and an RMS on-state current (IT(RMS)) of 0.2 A at Tamb = 100 °C. The device includes an integrated high-voltage clamping structure with a typical clamping voltage (VCL) of 600 V to absorb inductive turn-off energy. Gate triggering requires a negative current sourced by the gate pin, with a maximum IGT of 5 mA and VGT of 0.9 V. Non-repetitive surge peak on-state current (ITSM) is rated at 7.3 A for 50 Hz and 8 A for 60 Hz frequencies.

Feature Summary

• Integrated overvoltage protection via a high-voltage clamping structure that absorbs inductive turn-off energy without external snubbers or varistors.
• Built-in gate level shifter driver separates the digital controller from the main switch, eliminating stressing gate kickback on microcontrollers.
• Negative gate current triggering allows direct interface with microcontrollers through a resistor, requiring no additional protection devices between gate and common terminals.

Applications

• AC on-off static switching in household appliances such as washing machines, dishwashers, tumble dryers, refrigerators, and water heaters.
• Driving low power high inductive or resistive loads including relays, valves, solenoids, dispensers, pumps, fans, micro-motors, door locks, and low power lamp bulbs.
• Industrial control systems requiring compliance with IEC 61000-4-5 transient voltage standards.

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package type matches the required TO-92 configuration. Check datasheet revisions for any updates to electrical characteristics or thermal resistance values. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Validate lead-free status against RoHS directives if applicable to the target market regulations.

Selection Notes

Select this component when designing circuits for low power AC load switching up to 0.2 A RMS. Ensure the application voltage does not exceed the 500 V repetitive peak off-state rating. Verify that the load inductance and holding current are within the turn-off commutation limits defined in the datasheet tables. Consider the thermal resistance of 150 °C/W junction-to-ambient for TO-92 packaging when calculating heat dissipation under continuous operation conditions.

Part Context

The ACS102-5TA belongs to the ACS102 series of AC line switches built around the ASD™ concept. This series includes variants with different voltage ratings and packages, such as the SO-8 version (ACS102-5T1). The TO-92 package provides a cost-effective solution for single-switch applications where multiple units sharing a cooling pad are not required. The device is part of STMicroelectronics' broader portfolio of intelligent power switches for mains-connected equipment.

Replacement Considerations

Direct substitutes include other ACS102 series members like the ACS102-6TA for higher voltage ratings. Alternative packages such as the SO-8 ACS102-5T1 offer similar electrical performance with different mounting requirements. Verify compatibility with existing PCB footprints and thermal management strategies when transitioning between package types or voltage variants within the same product family.