What's the difference of RCCB, RCBO?
The function of ETEK's RCCB is testing ground fault current when detected Fault current  leakage current is more than the leakage when the tripping current RCCBs will loop Disconnect. It is important to note RCCBs does not have magnetic protection namely  and short circuit protection.

In addition to other protective components.Under the condition of RCCBs on-off capacity rating only up to 80 A.In conclusion RCCBs only leakage protection and rated load current on and off.
With over-current protection of residual current circuit breaker.It is the Residual Current management circuit-Breakers with Integral Overcurrent protection.

ETEK's RCBO function:Protection of short-circuit protection,excessive protection andLeakage protection.
Residual current circuit breaker module RCCB,the full name of this is the "Residual Current" Circuit-Breakers.