The current ratings of the 7300A cover the range from 16 Amps up to 160 Amps, with units rated at 80 Amps and above being fan cooled.

The voltage rating extends to a maximum of 500 Volts AC.

These units consist of three thyristor controlled channels each rated at the specified current and voltage.

The 7300A is available with a selection of firing modes to suit most applications.

It is suitable for controlling resistive loads with high or low temperature coefficient, short wave infrared (SWIR) or inductive loads, including transformer burst firing.

Control modes 7300A units use one of the following: RMS load voltage squared V2, RMS load current squared I2 Load power P, Open load OL

Limits and alarms
Optional current limit which can work in all firing modes prevents excessive currents from flowing in the load circuit.

Optional alarms can warn of thyristor short circuit or load open circuit (GRF alarm). Additionally partial load failure with automatic set up can detect the loss of one out of up to four parallel loads (DLF alarm). Over temperature shutdown is provided with fan cooled units (above 125 Amps) with optional alarm.