Product Description:

The PST6100.201-L belongs to the PST Thyristor Power Units series from Bosch Rexroth Indramat. As a thyristor-based power unit, it is installed in automated machinery to modulate AC energy delivered to high-current loads while keeping cabinet wiring simplified. The device fits recessed panels and interfaces with higher-level controls through a PROFIBUS timing channel, allowing synchronized firing commands within complex production cells. This operating method is useful where the machine controller must coordinate power delivery with repeatable process timing, such as in heating or welding applications that depend on controlled phase-angle switching.

The unit draws its control electronics from a 24 V DC auxiliary supply and passes line current through a silicon rectifier bridge that can supply a nominal 130 A to the connected load. When used with matching transformers, it supports up to 76 kVA of apparent power, making it suitable for medium-capacity welding or heating circuits that require substantial current. Internal conduction and switching generate cabinet losses of 70 W, so the design uses forced-air cooling across the heat sinks rather than liquid cooling. Protection against accidental contact is rated at IP20, while an MOV network limits mains surges and integrated sensors monitor internal temperature rise during operation.

Ambient operation is permitted up to 55 °C, provided the incoming cooling air stays below 45 °C and the application follows a maximum duty cycle of 50% to prevent thermal saturation during repeated load pulses. At installation, at least 100 mm of clearance must be left above and below the chassis so the blower path remains unobstructed and warm air can move away from the heat-producing sections. The power terminals accept conductors up to 50 mm², which helps match the current path and keep connection resistance low. The recessed mounting style places the heat-dissipating surfaces flush with the enclosure, supporting straight airflow through the cabinet.