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This part of IEC 60539 applies to directly heated surface mounted negative temperature coefficient thermistors which are usually manufactured from transition metal oxide materials with semi-conductive properties. These thermistors have metallized terminal faces or solder strips and are intended for direct mounting on substrates of hybrid integrated circuits or printed-circuit boards. The responsible Committee is K 614 "Temperatur- und spannungsabhängige Widerstände" ("Temperature- and voltage-dependent resistors") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.
This document replaces DIN EN 60539-2:2004-09 .
This document has been replaced by: DIN EN IEC 60539-2:2020-12 .