No. There are many types of SSL certificates. They can be based on how many domain names or subdomains you own, such as:
Single- One fully qualified domain name or subdomain is secured
Wildcard- One domain name is covered and unlimited subdomains
Multi-Domain- secures multiple domain names
The level of validation required, such as:
Domain validation – This level covers basic encryption as well as verification of ownership of domain name registrations. This certificate is usually received within a few hours.
Validation of Organization – In addition to the basic encryption and verification that the domain name registration is registered, authenticated details about the owner (e.g. name and address) will be provided. It can take a few hours or several days for this type of certificate to be issued.
Extended Validation (EV) – This certificate provides the highest level of security due to the rigorous examination performed before it is issued. The guidelines established by the SSL industry’s governing consortium are strict. The legal, physical, and operational existence of an entity are all verified. It usually takes several days to receive this type of certificate.