Overview
The ACST6-7ST, produced by STMicroelectronics, is a high-performance AC power switch belonging to the ACS/ACST power switch family. This device is built using Application Specific Discrete (A.S.D.) technology and is designed for use in home appliances and industrial systems. It features a Triac structure with a high voltage clamping device, which enables it to absorb inductive turn-off energy and withstand line transients as specified in the IEC 61000-4-5 standards. The ACST6-7ST requires a low gate current (IGT < 10 mA) for activation and exhibits high noise immunity, complying with IEC standards such as IEC 61000-4-4 (fast transient burst test).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| On-state rms current (IT(RMS)) | 6 | A |
| Repetitive peak off-state voltage (VDRM/VRRM) | 700 | V |
| Gate triggering current (IGT) | 10 | mA |
| Operating temperature range | -30 to 125 | °C |
| Insulation voltage (TO-220FPAB package) | 2000 | V RMS |
| Rate of decrease of commutating on-state current (dI/dt)c | 3.5 | A/ms |
| Rising ratio of off-state voltage (dV/dt)c | 500 | V/µs |
| Package types | TO-220AB, TO-220FPAB, D2PAK, I2PAK |
Key Features
- Triac with overvoltage protection
- Low gate triggering current (IGT < 10 mA)
- High noise immunity complying with IEC 61000-4-4 standards
- Snubberless turn-off commutation
- High off-state reliability with planar technology
- No external overvoltage protection required
- Reduces power passive component count
- Complies with UL standards (file ref: E81734) for TO-220FPAB package
Applications
- AC mains static switching in appliance and industrial control systems
- Drive of medium power AC loads such as universal motors in washing machines, compressors for refrigerators or air conditioners, and induction motor drives for dishwashers and clothes dryers
- Actuator for thermostats in refrigerators or freezers
Q & A
- What is the ACST6-7ST used for?
The ACST6-7ST is used for AC mains static switching in appliance and industrial control systems, and for driving medium power AC loads such as motors and compressors.
- What are the key features of the ACST6-7ST?
The key features include a Triac with overvoltage protection, low gate triggering current, high noise immunity, snubberless turn-off commutation, and high off-state reliability.
- What are the operating temperature ranges for the ACST6-7ST?
The operating temperature range is from -30°C to 125°C.
- What packages are available for the ACST6-7ST?
The device is available in TO-220AB, TO-220FPAB, D2PAK, and I2PAK packages.
- Does the ACST6-7ST require external overvoltage protection?
No, the ACST6-7ST does not require external overvoltage protection due to its built-in high voltage clamping device.
- What is the maximum on-state rms current for the ACST6-7ST?
The maximum on-state rms current is 6 A.
- What is the gate triggering current for the ACST6-7ST?
The gate triggering current is less than 10 mA.
- Is the ACST6-7ST compliant with any specific standards?
Yes, it complies with IEC 61000-4-5 and IEC 61000-4-4 standards.
- Can the ACST6-7ST be driven directly by a microcontroller?
Yes, the ACST6-7ST can be driven directly by a microcontroller through a simple gate resistor due to its low gate triggering current.
- What is the insulation voltage for the TO-220FPAB package?
The insulation voltage for the TO-220FPAB package is 2000 V RMS.
