This indicates the maximum current capacity that the circuit breaker can handle before it trips.

This indicates the number of separate circuits the breaker can control simultaneously. In this case, it can control three separate circuits.

The “DIN” in the name suggests that it is designed for mounting on a DIN rail, which is a standard type of mounting used in many electrical installations.

The circuit breaker may have specific trip characteristics, such as type B, C, or D, which determine how quickly it will trip in response to overcurrent conditions.