Overview
The ACST6-7SFP is a high-performance overvoltage protected AC switch produced by STMicroelectronics. This device is part of the AC power switch family built around Application Specific Discrete (ASD) technology. It is designed to control medium power loads in home appliances and industrial systems, offering robust protection against line transients and high noise immunity. The ACST6-7SFP embeds a Triac structure with a high voltage clamping device, enabling it to absorb inductive turn-off energy and withstand line transients as specified in IEC 61000-4-5 standards.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VDRM/VRRM (Repetitive peak off-state voltage) | 700 | V |
| IT(RMS) (On-state rms current, full cycle sine wave, no heat sink, Tamb = 40°C) | 1.5 | A |
| IT(RMS) (On-state rms current, full cycle sine wave, TO-220AB package, Tcase = 105°C) | 6 | A |
| ITSM (Non repetitive surge peak on-state current, Tj initial = 25°C, full cycle sine wave, tp = 20 ms) | - | A |
| IGT (Gate triggering current) | < 10 | mA |
| dI/dt (Critical rate of decrease of main current) | > 3.5 | A/ms |
| Package | TO-220FPAB | - |
Key Features
- Triac with overvoltage protection
- Low gate triggering current (IGT < 10 mA)
- High noise immunity: static dV/dt > 200 V/µs
- Snubberless turn-off commutation
- Needs no external overvoltage protection
- Direct interface with microcontroller
- Reduces power passive component count
- High off-state reliability with planar technology
- Complies with IEC 61000-4-5 and IEC 61000-4-4 standards
Applications
- AC mains static switching in appliance and industrial control systems
- Drive of medium power AC loads such as universal motor of washing machine drum, compressor for fridge or air conditioner
- Induction motor drive actuator for refrigerator/freezer compressor, dishwasher spray pump, clothes dryer tumble
- Actuator for the thermostat of a refrigerator or freezer
Q & A
- What is the ACST6-7SFP used for?
The ACST6-7SFP is used for controlling medium power loads in home appliances and industrial systems, such as AC motors and compressors.
- What is the maximum on-state rms current of the ACST6-7SFP?
The maximum on-state rms current is 6 A when the case temperature (Tcase) is 105°C.
- What is the repetitive peak off-state voltage of the ACST6-7SFP?
The repetitive peak off-state voltage (VDRM/VRRM) is 700 V.
- Does the ACST6-7SFP require external overvoltage protection?
No, the ACST6-7SFP does not require external overvoltage protection due to its built-in high voltage clamping device.
- What are the package options for the ACST6-7SFP?
The ACST6-7SFP is available in TO-220FPAB, TO-220AB, D²PAK, and I²PAK packages.
- How does the ACST6-7SFP handle line transients?
The ACST6-7SFP can safely withstand AC line transient voltages by clamping low energy spikes and switching to the on state to dissipate higher energy shocks.
- What standards does the ACST6-7SFP comply with?
The ACST6-7SFP complies with IEC 61000-4-5 and IEC 61000-4-4 standards.
- Can the ACST6-7SFP be driven directly by a microcontroller?
- What is the thermal performance of the ACST6-7SFP?
The ACST6-7SFP offers high thermal performances in both static and transient modes, suitable for applications like compressor inrush current or high torque operating conditions of an AC motor.
- What is the gate triggering current of the ACST6-7SFP?
The gate triggering current (IGT) of the ACST6-7SFP is less than 10 mA.
