B644SE-2T

Thyristors - SCRs - Modules

The B644SE-2T is a silicon-controlled rectifier module developed by Unisonic Technologies Co., one of the world’s leading suppliers of thyristors and SCR modules. This device is specifically designed for high frequency switching applications such as motor drives and UPS applications. The B644SE-2T SCR module offers advantages such as excellent current withstand capability, high frequency operation, soft switching, low dv/dt, low noise operation, and rugged performance in harsh environments.

Application Field

The B644SE-2T can be used in a variety of industrial and automotive applications, such as motor drives, UPS and inverter systems, switching power supplies, pump and fan drives, welding and machine tool controls, and traction systems. This SCR module is designed for use with high frequency AC and DC voltages up to 1000V and frequencies up to 200kHz. It can also be used for low frequency applications, such as thyristor controlled series capacitors (TCSCs) and medium voltage applications, up to 6.6kV.

Working Principle

The B644SE-2T is a four-gate SCR module that consists of two thyristors connected in inverse-parallel for high current capacity. The module has two anode and two cathode terminals, and each thyristor has a gate connected to its own gate terminal. A short pulse of current is required to turn the device on, and the current flowing through the device will remain on until it is switched off. The SCR module is equipped with dv/dt and di/dt snubbers to reduce surge voltages, dv/dt and dI/dt, which helps protect the device from overvoltage and thermal stress.

The B644SE-2T is designed with a low distortion operating principle, which has the advantage of being able to limit the surge and noise induced by the SCR module itself. This helps the user to achieve more reliable and efficient switching of the devices, thus increasing the life of the module. The B644SE-2T also has a low off-state leakage current and soft switching capability, which helps to reduce switching times and increases the power efficiency of the system.

Conclusion

The B644SE-2T SCR module from Unisonic Technologies is a powerful, reliable and efficient device for high frequency switching applications. This SCR module has excellent current withstand capability, a low distortion operating principle, and a variety of protection features to protect against overvoltage and thermal stress, making it suitable for use in a wide range of industrial and automotive applications. With its high frequency operation, reliable switching, and robust design, the B644SE-2T SCR module is unquestionably an ideal choice for any application needing reliable, efficient switching.