PTC thermistors as
limit temperature sensors
SMD, EIA case sizes 0402, 0603 and 0805,
superior series
Series/Type: B59421, B59641, B59721
Date: July 2016
EPCOS AG 2016. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.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
Reflow soldering only
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.