FeaturesTypical Applications
  1. Interdigitated amplifying gates

  2. Fast turn-on and high di/dt

  3. Low switching losses

  4. Short turn-off time

  5. Hermetic metal cases with ceramic insulators

  1. Inductive heating

  2. Electronic welders

  3. Self-commutated inverters

  4. AC motor speed control

  5. General power switching applications


TypeVDRM/VRRM [V]IT[AV] [A]tq [us]ITSM [kA]dv/dt [V/us]di/dt [A/us]IDRM/IRRM [mA]IGT [mA]VGT [V]IH [mA]VTM/ITM [V/A]Datasheet














Overview of Fast Turn-Off Thyristors

Fast Turn-Off Thyristors, also known as FTO thyristors, are advanced semiconductor devices designed for rapid switching and high-speed control of electric power systems. These thyristors feature exceptionally fast turn-off capabilities, enabling quick interruption of current flow. Their fast switching speed makes them ideal for use in high-frequency applications, power converters, and motor control systems where rapid response times are crucial. FTO thyristors offer superior control over power flow, improved system efficiency, and enhanced system reliability, making them a valuable component in modern power electronics.

The Characteristics of Fast Turn-Off Thyristors

1. Fast turn-off capability: Compared with traditional thyristors, fast turn-off thyristors can switch from conducting state to off state in a shorter time. This enables it to respond more quickly to control signals and reduce energy loss during the shutdown process.

2. High efficiency: Due to its fast turn-off capability, fast turn-off thyristors can reduce unnecessary energy loss during switching, thereby improving the overall efficiency of the system.

3. Wide voltage and current range: Fast turn-off thyristors are typically designed for high voltage and high current applications, enabling them to meet the needs of various industrial and commercial applications.

4. Good thermal stability: The fast shutdown thyristor adopts advanced heat dissipation design, which can maintain stable performance in high temperature environments.

5. Easy to control: The quick turn-off of the thyristor can be controlled through a simple trigger circuit, and the trigger signal can be a current or voltage pulse. This makes it easy to integrate into various control systems.

6. High reliability: The fast shutdown thyristor undergoes strict production process and quality control to ensure its high reliability, suitable for various harsh working environments.

7. Application diversity: Fast turn-off thyristors are widely used in fields such as motor control, power conversion, uninterruptible power supply (UPS), electric vehicles, wind power generation, and solar power generation, especially in situations that require fast response and efficient energy conversion.

Application of Fast Turn-Off Thyristors

1. Motor control: In the motor drive system, fast and precise control of the motor can be achieved by quickly turning off the thyristor. Especially in applications that require quick starting, stopping, or reversing of motors, fast turning off thyristors can provide excellent performance.


(Motor control)

2. Uninterruptible Power Supply (UPS): The UPS system requires the ability to quickly respond to fluctuations in the power grid and provide stable power to critical loads when necessary. Fast Turn-off thyristors are used in UPS to achieve efficient energy conversion and fast response.


(Uninterruptible Power Supply)

3. Power conversion: In power conversion applications, such as inverters and frequency converters, quickly turning off thyristors can achieve efficient DC to AC conversion, and can quickly respond to load changes, maintaining stable output voltage and current.


(Power conversion)

4. Electric vehicles: Fast Turn-off thyristors are often used in the battery management system and motor controller of electric vehicles. They allow for fast charging and discharging, while providing efficient energy conversion and battery protection.


(Electric vehicles)

5. Renewable energy: In solar and wind power generation systems, fast Turn-off thyristors are used to achieve maximum power point tracking (MPPT) and grid connection control. They can quickly respond to changes in light and wind speed, ensuring that the system operates at maximum efficiency.


(Renewable energy)

6. Power grid management: Fast Turn-off thyristors are used in power grid management systems for applications such as reactive power compensation, active power filtering, and load balancing. They can quickly respond to changes in the power grid status, maintain the stability and efficiency of the power grid.


(New energy generation)

7. Industrial automation: In the field of industrial automation, fast shutdown thyristors are used in various automation equipment and production lines to achieve efficient motor control, energy conversion, and process control.


(Industrial automation)

Company Profile

PDDN Photoelectron Technology Co., Ltd.( is one of the leading enterprises in power electronics technology and power products, which is fully involved in developing solar inverters, transformers, voltage regulators, distribution cabinets, thyristors, modules, diodes, heaters, and other electronic devices or semiconductors. We will be committed to providing users with high-quality, efficient products and considerate service.

It accepts payment via Credit Card, T/T, West Union, and Paypal. PDDN will ship the goods to customers overseas through FedEx, DHL, by sea, or by air. If you want high-quality electronic devices or semiconductor products, please send us inquiries; we will be here to help you.


Payment Methods

L/C, T/T, Western Union, Paypal, Credit Card etc.


By sea, by air, by express, as customers request.

Storage Conditions

1) Store in a dry environment at room temperature.

2) Avoid damp and high temperature.

3) Use immediately after opening the inner packing bag.



What is Fast Turn-off Thyristors?

Re: Fast Turn-off Thyristors is a special type of semiconductor power electronic device. They have the ability to quickly Turn-off, and can switch from the on state to the off state in a short period of time, thereby achieving rapid control of current.


What are the main advantages of Fast Turn-off Thyristors?

Re: The main advantages of Re: Fast Turn-off Thyristors include fast Turn-off capability, high voltage resistance, high current capacity, and low losses. These characteristics make them widely used in power electronic systems that require fast response and precise control, such as high-frequency inverter power supplies, motor control, etc.


How does Fast Turn-off Thyristors work?

Re: The working principle of Re: Fast Turn-off Thyristors is based on the characteristics of semiconductor materials and electronic control. When appropriate triggering signals are applied, they can quickly transition from a cut-off state to a conduction state. When it is necessary to Turn-off, they can quickly return to the cut-off state by changing the control signal or using external circuits.


How to choose and apply Fast Turn-off Thyristors correctly?

Re: When selecting and applying Fast Turn-off Thyristors, it is necessary to consider its rated voltage, rated current, Turn-off time, triggering method, and other parameters. In addition, it is necessary to select suitable models and specifications based on specific application scenarios and requirements, and follow relevant circuit design, installation, and maintenance specifications.


How to ensure the safety and reliability of Fast Turn-off Thyristors?

Re: To ensure the safety and reliability of Fast Turn-off Thyristors, it is necessary to first ensure that they operate within the specified rated voltage and current range. In addition, attention should also be paid to its heat dissipation conditions to avoid overheating. During use, regular inspections and maintenance should be carried out to promptly identify and address potential faults and issues. At the same time, it is also very important to follow the relevant safety operation and maintenance regulations.

Opening Time

  • Sunday – Friday: 09:00am – 10:30pm
  • Saturday: 10:00am – 02:00pm

Contact Info.

  • Email:
  • Mobile: +86 18837951818

Contact Address

  • Tongrun photoelectron, 3rd Floor, Nanshan Science Park, Nanshan District, Shenzhen, Guangdong, China