ACS120-7SB-TR

Overview

The ACS120-7SB-TR is an AC line switch from the ASD family, packaged in a DPAK. It controls loads up to 2 A RMS with a blocking voltage of +/- 700 V and a typical avalanche clamping voltage of 1100 V. The device integrates a high-voltage clamp for inductive turn-off energy absorption and a gate level shifter driver. Triggering requires a negative gate current flowing out of the gate pin, with a maximum triggering current of 10 mA at 25°C. It offers high noise immunity with a static dV/dt greater than 500 V/µs.

Feature Summary

• Integrates a high-voltage clamping structure to absorb inductive turn-off energy without external snubbers or varistors.
• Includes a gate level shifter driver that electrically separates the digital controller from the main switch.
• Interfaces directly with microcontrollers while eliminating gate kickback signals.
• Enables equipment compliance with IEC 61000-4-5 surge standards.

Applications

• AC static switching in appliance control systems
• Driving low power high inductive or resistive loads such as relays, valves, solenoids, and dispensers
• Control of pumps, fans, micro-motors, and defrost heaters

Procurement Notes

Verify the specific ordering suffix '-TR' corresponds to the tape and reel delivery mode containing 2500 units per base quantity. Confirm the package type matches the DPAK outline dimensions provided in the datasheet. Ensure the component marking 'ACS1207S' aligns with the manufacturer's identification requirements for this part number.

Selection Notes

Select this component for applications requiring direct microcontroller interface without additional isolation circuitry. The integrated avalanche clamping allows for simplified designs driving inductive loads like solenoids and motors. Verify thermal resistance requirements against the junction-to-ambient characteristics for the DPAK package under expected operating conditions.

Part Context

The ACS120-7SB-TR belongs to the STMicroelectronics AC Switch (ACS) family built around the ASD concept. This series provides high-performance switching capabilities for AC line applications. The device combines power switching with protection features, distinguishing it from standard thyristors by its integrated gate drive separation and energy absorption mechanisms.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How is the ACS120-7SB triggered?

It is triggered with a negative gate current flowing out of the gate pin G.

What is the purpose of the internal clamping structure?

The high voltage clamping structure absorbs inductive turn-off energy, allowing the switch to drive inductive loads up to 2 A without external snubber circuits.

Does the device require external protection components?

No, it needs no more external protection snubber or varistor and enables equipment to meet IEC 61000-4-5 standards.