B57020M250 EPCOS, B57020M250 Datasheet - Page 2

• Manufacturer Part Number: B57020M250
• Description: Probe Assemblies
• Manufacturer: EPCOS

Reliability data
Test
Storage in
dry heat
Storage in
coldness
Storage in damp
heat, steady state
Rapid temperature
cycling
Storage in
water
Temperature
cycling test
Voltage
proof test
Insulation
test
Temperature Measurement
Probe Assemblies
Standard
IEC
60068-2-2
IEC
60068-2-3
IEC
60068-2-14
Test conditions
Storage at upper
category temperature
T: 80 C
t: 1000 h
Storage at lower
category temperature
T: – 40 C
t: 1000 h
Temperature of air: 40 C
Relative humidity of air: 93 %
Duration: 56 days
Lower test temperature: – 40 C
Upper test temperature: 80 C
Time to change from lower to upper
temperature: < 30 s;
Number of cycles: 1000
Medium: air
Temperature of water: 30 C
t: 4000 h
Applied voltage with drop resistor
10 k :10 V
on (t
Lower test temperature: – 30 C
Upper test temperature: 10 C
Test frequency < 15 min under
wetness and frozen water
Number of cycles: 50000
Medium: air
3750 V; 1 min
The sensors are placed in a vessel
containing metallic balls of 1 mm
diameter (with total immersed head).
The applied voltage is 500 V
on
= 30 min) and off (t
dc
121
switched between
05/02
off
= 30 min)
dc
.
(typical)
< 2 %
< 2 %
< 2 %
< 2 %
< 2 %
< 2 %
R
25
/R
25
Remarks
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No flash-
over
Above
1000 M
B57020
M 2020