No, the security deposit is not debited from your bank account.
By default, there is no impact of the total amount of the security deposit on your credit card limit (no blocking of funds). We only make a pre-authorization of 1€ on your bank account to check your creditworthiness.
Depositing your security deposit online does not impact your purchasing power. You can fully enjoy your stay or your service!
However, this may vary depending on your rental company. In this case, a message will tell you the amount impacted on your bank account after entering your credit card information.