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B57891M0682000 Datasheet(PDF) 24 Page - EPCOS
B57891M0682000 Datasheet(HTML) 24 Page - EPCOS
/ 28 page
Cautions and warnings
See "Important notes".
Store thermistors only in original packaging. Do not open the package prior to storage.
Storage conditions in original packaging: storage temperature
°C ... +45 °C, relative
≤75% annual mean, <95% maximum 30 days per annum, dew precipitation is
Do not store thermistors where they are exposed to heat or direct sunlight. Otherwise, the
packing material may be deformed or components may stick together, causing problems during
Avoid contamination of thermistor surface during storage, handling and processing.
Avoid storage of thermistors in harmful environments like corrosive gases (SO
, Cl etc).
Use the components as soon as possible after opening the factory seals, i.e. the
Solder thermistors within the time specified after shipment from EPCOS.
For leaded components this is 24 months, for SMD components with nickel barrier termination
12 months, for SMD components with AgPd termination 6 months.
NTC thermistors must not be dropped. Chip-offs or any other damage must not be caused
during handling of NTCs.
Do not touch components with bare hands. Gloves are recommended.
Avoid contamination of thermistor surface during handling.
Washing processes may damage the product due to the possible static or cyclic mechanical
loads (e.g. ultrasonic cleaning). They may cause cracks to develop on the product and its parts,
which might lead to reduced reliability or lifetime.
Bending / twisting leads
A lead (wire) may be bent at a minimum distance of twice the wire’s diameter plus 4 mm from
the component head or housing. When bending ensure the wire is mechanically relieved at the
component head or housing. The bending radius should be at least 0.75 mm.
Twisting (torsion) by 180
° of a lead bent by 90° is permissible at 6 mm from the bottom of the
Use resin-type flux or non-activated flux.
Insufficient preheating may cause ceramic cracks.
Rapid cooling by dipping in solvent is not recommended.
Complete removal of flux is recommended.
Temperature measurement and compensation
Leaded NTC thermistors, lead spacing 2.5 mm
Page 24 of 28
Please read Cautions and warnings and
Important notes at the end of this document.
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