ITU-T K.144 PDF

This Recommendation in the surge protective component application guide series covers self-restoring thermally activated overcurrent protectors (OCPs). These OCPs are operated by self-heating and are automatically reset after the end of the overcurrent condition without the need for manual intervention. This Recommendation covers the two types of body material; polymer and ceramic. These components are referred to as follows:

a) polymer positive temperature coefficient (PPTC) thermistors;

b) ceramic positive temperature coefficient (CPTC) thermistors;

Guide topics include:

– Construction

– Operation

– Production

– Ratings

– Characteristics

– Application examples