Eaton Logo

looking for temperature derating curves for breakers

The general standard operating temperature range for Eaton molded case and miniature circuit breakers is -20°C to +70°C.

de-rating charts for Quicklag miniature (BAB) 1-pole and 2-pole breakers are available (see attached).

MCCB temperature derating info is published in section 27 of the online Eaton Electrical Consulting Application Guide (CAG).

Additional temperature derating info for Series G breaker frames is published in the current online catalog.


Web link to current online catalog section for Eaton miniature circuit breaker product:
http://www.eaton.com/ecm/idcplg?IdcService=GET_FILE&allowInterrupt=1&RevisionSelectionMethod=LatestReleased&Rendition=Primary&dDocName=VOL04_TAB01

Web link to current online catalog section for Eaton molded case circuit breaker product:
http://www.eaton.com/ecm/idcplg?IdcService=GET_FILE&allowInterrupt=1&RevisionSelectionMethod=LatestReleased&Rendition=Primary&dDocName=VOL04_TAB02

Web link to current online version of Eaton Electrical Consulting Application Guide (CAG):
http://www.eaton.com/Eaton/ProductsServices/Electrical/Support/Documentation/Catalogs/Consultingapplicationguide/index.htm

  1. Quicklag 1P temp derating curve.pdf
  1. MCCB_Unusual Environmental Conditions_CAG page 27.3-37_4-2016.pdf