Breaking Capacity Rating of MCB

I am a designer of a high power single phase 240 Vac lab equipment that could consume current 8-10 Amps during operating mode. I would recommend my client to use a power point that solely connected to a dedicated MCB to operate this equipment at his facilities. The power consumption would probably around 2 kW.

My client asked me which type of MCB should be allocated solely for this equipment? Here I told him:

Voltage Rating: 240Vac
Current Rating: 10A or above, preferrable 16A
Tripping curve: Type C

But how to determine correct breaking capacity of that miniature circuit breaker (MCB)? There is few options for breaking capacity: 4.5 kA, 6 kA, 10 kA, 15 kA and 25 kA. Which one I should go for?

Does the Prospective short circuit current of my lab equipment have something to do with this breaking capacity?

Yes its all to do with the fault current. If your MCB is fed from a 1MW transformer 5m away the fault current would be a lot higher then if it is 200m away in a factory sub-circuit.
Frank

Does the Prospective short circuit current of my lab equipment have something to do with this breaking capacity?

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No. Breaking capacity is the current that can be safely disconnected in case of a short.

Considering that the lab equipment will be connected to a line with 16 A fuse in the switchboard and that there will be master fuses in the switchboard and main distribution board with respective high breaking capacity, fuse dimensioning is more a matter of selectivity and possibly overload protection.

No its the prospective capacity to deliver current from your network i.e. loop impedance.
Frank