Product description:
Miniature Circuit Breaker (MCB)
Schneider Electric (Acti9 K60N Biconnect)
Rated current 10A/16A/20A/32A/40A/63A
1 pole
B-curve
Short circuit breaking capacity (Icn) 6kA/10kA , 6000A/10000A
1/3 modules
Double term. (bi-connect)
DIN rail mounting

What is the difference between K60N and K60H?
K60N refers to the MCB having 6000A of rated breaking capacity (LCN)
The service breaking capacity (LCS) uses 100% of the LCN

K60H refers to the MCB having 10000A of rated breaking capacity (LCN)
The service breaking capacity (LCS) uses only 75% of LCN

The rated breaking capacity (Icu) or (Icn) is the maximum fault-current a circuit-breaker can successfully interrupt without being damaged. The probability of such a current occurring is extremely low, and in normal circumstances the fault-currents are considerably less than the rated breaking capacity (Icu) of the CB