B57864 EPCOS AG, B57864 Datasheet - Page 3

• Manufacturer Part Number: B57864
• Description: Ntc Thermistors For Temperature Measurement
• Manufacturer: EPCOS AG

Note
The type series S864 has a specially designed insulation (coating, wire coating) to withstand the
immersion test in water of 1000 h, 25 C. Therefore these sensors must be protected to avoid any
damage of the insulation material during handling and in the application.
Reliability data
Test
Storage in
dry heat
Storage in damp
heat, steady state
Rapid temperature
cycling
Long-term stability
(empirical value)
Immersion test
Immersion test
Please read Cautions and warnings and
Important notes at the end of this document.
Temperature measurement
Miniature sensors with bendable wires
Standard
IEC
60068-2-2
IEC
60068-2-78
IEC
60068-2-14
Test conditions
Storage at upper
category temperature
T: 155 C
t: 1000 h
Temperature of air: 40 C
Relative humidity of air: 93%
Duration: 56 days
Lower test temperature:
Upper test temperature: 155 C
Number of cycles: 100
Temperature: 70 C
t: 10000 h
Test voltage 0.3 V DC on NTC
over protective resistor, sensors
immersed into water,
temperature: 25 C
t: 1000 h
switched between on (t
and off (t
Test voltage 0.3 V DC on NTC
over protective resistor, sensors
immersed into water, ambient
temperature (80 C)
t: 168 h
off
Page 3 of 13
= 1 h)
on
= 5 h)
55 C
(typical)
< 2%
< 1%
< 1%
< 2%
< 2%
< 3%
R
25
/R
25
Remarks
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
B57864S
S864