IEC 60738-1:1998

Applies to directly heated positive temperature coefficient thermistors, insulated or non-insulated, having a resistance temperature characteristic which approximates to a step-function. Typically they are made of ferro-electric semi-conductive materials. Specifies the conditions for approval, acceptance and continuous quality control. Defines the terminology for the thermistors covered by this standard, and defines the methods of test.

IEC 60738-1:2006 describes terms and methods of test for positive step-function temperature coefficient thermistors, insulated and non-insulated types typically made from ferro-electric semi-conductor materials. It establishes standard terms, inspection procedures and methods of test for use in detail specifications for Qualification Approval and for Quality Assessment Systems for electronic components. This third edition cancels and replaces the second edition published in 1998 and constitutes a minor revision. The changes with respect to the previous edition refer to the tables, figures and references.