UL 2367:2021 PDF Download

UL 2367:2021 is a standard that covers solid-state overcurrent protectors. These devices are solid-state switches that are designed to limit the output current to a safe level in situations where the output load exceeds the current-limit threshold or when there is a load-side short-circuit. The standard specifies that these protectors are intended to be used on the load-side of an isolating transformer, power supply, or battery to provide supplementary protection. The standard also includes a table that outlines the maximum current and power levels for these devices.

The devices covered by UL 2367:2021 are integrated circuits, and the standard does not specify the electrical spacings within these devices. Furthermore, the devices are entirely electronic and have no means for mechanical operation or reset. The terminals of the devices are intended for factory wiring only and are designed to be mounted on a printed wiring board.

Additionally, the standard covers devices that are intended to be used as limited power source current limiters in accordance with UL 62368-1 and UL 60950-1. These devices limit output currents to values below 5 amperes and a maximum output power of 100 VA. It is important to note that the devices covered by this standard are only intended for the supplementary overcurrent protection of secondary circuits and have not been evaluated for branch-circuit protection.

UL 2367:2021 may also cover devices intended for use in telecommunications applications, but devices intended for connection to telecommunications networks with outside plant connections should be evaluated according to the requirements of UL 60950-1, UL 62368-1, or UL 497A, depending on the application. Lastly, the standard includes provisions for solid-state overcurrent protectors that provide Class 2 limitations as defined in the National Electrical Code, NFPA 70.