... Epcos NTC R25C 100KB25/50C 4000KTolerance +/-1% Features:1,UL, RoHS certificate.2,ISO9001:2000 ... , ISO140013,Good Quality,------------------------------------------------------------------------------------------------------SPECIFICATION 1,ScopeThis specification deals with shape, dimensions, ... in still air) (3) Thermal dissipation constant (δ): δ=1.1~1.6mW/°C (in still air) (4) Operating ...