UL 2367

Abstract

This standard covers solid-state overcurrent protectors. These devices are solid-state switches that limit the output current to a safe level when the output load exceeds the current-limit threshold or when a load-side short-circuit is present. Solid-state overcurrent protectors are intended to be used on the load-side of an isolating transformer, power supply or battery to provide a means of supplementary protection. <br>The devices covered by these requirements are integrated circuits, and electrical spacings within the devices are not specified. <br>The devices covered by these requirements are entirely electronic in nature and have no means for manual operation or reset. <br>The terminals of the devices covered by these requirements are for factory wiring only (intended to be mounted on a printed wiring board). <br>The devices covered by these requirements shall only be used on supply circuits originating from an isolating transformer, a power supply or a battery with limited maximum current and power levels as noted in Table 1.1. Use on supply circuits with a higher power capability requires additional evaluation for reliability, such as those requirements contained in the Standard for Safety-Related Controls Employing Solid-State Controls, UL 991. <br>The devices covered by these requirements limit output currents to values less than the overcurrent protection rating of 5 amperes. <br>The devices covered by these requirements have only been evaluated for supplementary overcurrent protection of secondary circuits supplied by the load side of a transformer, power supply or battery and have not been evaluated for branch-circuit protection. <br>This standard may cover devices intended for use in telecommunications applications. However, devices intended for connection to telecommunications networks with outside plant connections should be evaluated in the end-use in accordance with the requirements of the Standard for Information Technology Equipment Safety - Part 1: General Requirements, UL 60950-1, or the Standard for Secondary Protectors for Communication Circuits, UL 497A, as appropriate.