Siemens Low Voltage Molded Case Circuit Breakers Sentron Molded Case Circuit Breakers - Circuit Breaker Enclosures are Circuit Protection Molded Case Circuit Breakers. Sub Brand SENTRON Type ED Std UL F. Rating 50/60Hz Frame ED Enclosure TYPE 12 L 19.3 W 10.5 H 8 Operating Temperature (-25C -- 75C) AMBIENT TEMPERATUREEnvironmental Conditions INDUSTRIAL