PTC thermistors as limit temperature sensors SMD, EIA case sizes 0402, 0603 and 0805, superior series Series/Type: B59421, B59641, B59721 Date: August 2019 TDK Electronics AG 2019. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without TDK Electronics prior express consent is prohibited.Sensors Limit temperature sensors, EIA sizes 0402, 0603 and 0805 Superior series Applications Over-temperature protection of power components DC/DC converters SMPS Notebooks Home appliances Dimmers Electronic ballasts Automotive electronics Secondary protection of battery packs Features Qualification based on AEC-Q200 rev. D Suitable for reflow soldering Suitable for flow soldering only for types with ordering code ending in A562 Fast and reliable response RoHS-compatible UL approval to UL1434 Certified in accordance with IEC 60738-1 and IEC 60730-1 Annex J15 and J17 Lead-free terminations (tinned) for EIA case sizes 0603 and 0805 Lead-free ceramics for EIA case sizes 0402 and 0805, except B59421A0135A062 Options Other T or resistance values on request sense Delivery mode Blister tape (EIA case size 0805) or cardboard tape (EIA case sizes 0402 and 0603), 180-mm reel with 8-mm tape, taping to IEC 60286-3 Packing unit: 10.000 pcs. for EIA case size 0402, 4.000 pcs. for EIA case sizes 0805 and 0603 General technical data Max. operating voltage V 32 V DC max Minimum operating temperature (V V ) T 40 C max op,min Maximum operating temperature (V V ) T 125 C or T +25 C C max op,max sense,1 whichever is higher Please read Cautions and warnings and Page 2 of 35 Important notes at the end of this document.