SCCR

When a system is given an SCCR, or short circuit current rating, what is being said is that the SCCR rating is the maximum fault current that the machine can be exposed to without sustaining damage outside of a predefined criterion. While this rating would typically be applied to a whole machine or a panel, individual components can carry SCCR ratings and are sometimes used to determine the overall SCCR of a system. For example, in some cases, the SCCR rating for an entire machine would be based on the component with the lowest SCCR value, as that would be the first part of the machine to suffer from an extended overcurrent event.

Enerdoor’s line of filters that carry the UL approval can have SCCR ratings calculated for them based on the values of the components and how they are intended to be installed in the system. This is not always required, but is often times useful to help customers determine the overall SCCR rating of their system. It is very rare that the Enerdoor EMI filter carries the smallest SCCR rating in an entire system, but because it is installed on the main incoming power and all current would flow through it, it is important to know what the filter is able to withstand, especially in high current applications.