ACS108-6SA-AP

Overview

The ACS108-6SA-AP is a logic-level gate AC switch manufactured by STMicroelectronics, utilizing A.S.D.® technology for integrated overvoltage protection. It operates in a TO-92 package with three pins: Common (COM), Output (OUT), and Gate (G). The device supports an on-state RMS current of up to 0.8 A at a lead temperature of 76 °C, or 0.45 A at an ambient temperature of 64 °C. It features a blocking voltage capability of 600 V and requires a maximum gate trigger current of 10 mA. Non-repetitive surge peak on-state current reaches 13.7 A for a 16.7 ms pulse duration. The component functions within a junction temperature range of -30 °C to +125 °C.

Feature Summary

• Integrates overvoltage crowbar technology to absorb inductive turn-off energy and withstand mains transients, eliminating the need for external snubbers or varistors.
• Features a gate level shifter driver that separates the digital controller from the main switch, allowing direct interface with microcontrollers via negative gate current.
• Provides high noise immunity against static dV/dt and IEC 61000-4-4 burst disturbances.
• Utilizes a common package tab connection to support the parallel connection of multiple AC switches on a shared cooling pad.

Applications

• Alternating current on/off static switching in residential appliances and industrial control systems.
• Driving low power high inductive loads such as water valves, solenoids, relays, and dispensers.
• Controlling resistive loads including lamps and air flow dumpers.
• Actuating low power motors, fans, pumps, and door locks.

Procurement Notes

Verify the specific ordering suffix AP indicates Ammopack packaging containing 2000 pieces per unit. Confirm the device status remains active, noting that related variants like the ACS108-8SA-AP have been discontinued. Ensure compliance with RoHS and REACH standards as specified in the datasheet documentation before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring direct microcontroller interfacing without additional isolation components. The logic-level gate sensitivity allows for simple drive circuits using a single resistor. Consider the thermal derating curves if operating near the maximum ambient temperature limits or if driving continuous loads close to the 0.8 A rating.

Part Context

This part belongs to the ACS™ series of overvoltage protected AC switches built with A.S.D.® technology. It serves as a compact alternative to traditional triacs combined with external protection circuits. The series targets appliance actuators where space reduction and simplified bill of materials are critical design constraints.

Replacement Considerations

Direct functional replacements include other ACS108-6SA variants with different packaging options, such as ACS108-6SA-TR (Tape and Reel) or standard bulk versions. Verify pinout compatibility and thermal characteristics when substituting packages.