These are very nice DIN rail mounted circuit breakers for use in your projects, especially DRSSTC Tesla Coils.
Click here for the datasheet (PDF)
B-Curves are for resistive loads. Use these for your PLCs, general equipment
D-Curves are for capacitance / inductive loads. Use these for your DRSSTC bridge circuits
Note: If you are running 230/240VAC, you want to use a double-pole breaker.