This Outline of Investigation 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. See Table 1.1 for maximum current and power levels. The devices covered by these requirements are integrated circuits@ and electrical spacings within the devices are not specified. The devices covered by these requirements are entirely electronic in nature and have no means for manual operation or reset. The terminals of the devices covered by these requirements are for factory wiring only (intended to be mounted on a printed wiring board). 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. The devices covered by these requirements limit output currents to values less than the overcurrent protection rating of 5 amperes. 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. This Outline of Investigation 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 Telephone Equipment@ UL 1459@ the Standard for Secondary Protectors for Communication Circuits@ UL 497A@ or the Standard for Information Technology Equipment@ UL 60950 as appropriate.
UL 2367 BULLETIN-2009 history
1970UL 2367-2021 UL Standard for Safety Solid State Overcurrent Protectors
2014UL 2367 BULLETIN-2014 UL Standard for Safety Solid State Overcurrent Protectors (COMMENTS DUE: April 21@ 2014)
2012UL 2367 CRD-2012 UL Standard for Safety Solid State Overcurrent Protectors - Section / Paragraph Reference: 22 Subject: Markings (Edition 1: December 30@ 2009)
2011UL 2367 CRD-2011 UL Standard for Safety Solid State Overcurrent Protectors - Section / Paragraph Reference: 10.7 Subject: Acceptance Criteria for IC Current Limiters subjected to the Calibration/Re- Calibration Tests (Edition 1: December 30@ 2009)
2010UL 2367 CRD-2010 UL Standard for Safety Solid State Overcurrent Protectors - Section / Paragraph Reference: Table 1.1, Table 1.2, 1.6, 9B, 22.3 Subject: Evaluation of Special Purpose Solid-State Overcurrent Protectors (IC Current Limiters) for Use as Limited Power Source
2009UL 2367 CRD-2009 UL Standard for Safety Solid State Overcurrent Protectors - Section/Paragraph Reference: New - 9A, 9A.1, 9A.2, and 9A.3 Subject: Evaluation of Special Purpose Solid-State Overcurrent Protectors for Use as Class 2 Limiters (Edition 1: May 13, 2004)
2009UL 2367 BULLETIN-2009 UL Standard for Safety OUTLINE OF INVESTIGATION FOR SOLID STATE OVERCURRENT PROTECTORS (COMMENTS DUE: December 14@ 2009)
2009UL 2367-2009 UL Standard for Safety Solid State Overcurrent Protectors (First Edition; Reprint with revisions through and including May 2@ 2014)
2008UL 2367 BULLETIN-2008 OUTLINE OF INVESTIGATION FOR SOLID STATE OVERCURRENT PROTECTORS