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PFC thyristor module operates up to 690VAC

02 Apr 2015

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TDK Corp. has announced a thyristor module for power factor correction (PFC) with an expanded operating voltage range up to 690VAC. The EPCOS TSM-LC-N690 performs two-phase switching of the capacitors, so that a neutral conductor is not needed, noted the company.

Depending on the operating voltage, the module is geared for a reactive power of 40kvar to 75kvar and can switch currents of up to 60A.


The module continuously monitors voltage, phase and its own temperature, and is thus very reliable, stated TDK. Like all EPCOS thyristor modules, the TSM-LC-N690 operates silently and is wear- and maintenance-free with a short switching time of only 5ms. The module also helps to increase the operating life of the capacitors by switching at the zero crossing of the current. In addition, dangerous overcurrents are avoided and the grid is not exposed to transients. The thyristor module can be triggered by EPCOS dynamic power factor controllers, PLCs or directly from the process.

The EPCOS TSM-LC-N690 thyristor module with the ordering code B44066T3050E690 is suited for dynamic PFC applications with presses, welding machines, elevators, cranes and wind turbines, for example.

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