A UL489 listed circuit protector can act as the final overcurrent device dedicated to protecting the branch circuit and outlets. It does not require an additional "back up" overcurrent device wired in series to protect a circuit. Visit our C Series and E Series and F-Series circuit breakers for UL489 offerings.

UL1077 recognized circuit breakers act as supplementary circuit protectors. They require a listed overcurrent device as a back up.