NTC thermistors for
temperature measurement
Glass-encapsulated sensors
with insulation
Series/Type:
Date:
B57551G1
January 2018
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information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G1
G1551
Applications
Temperature measurement
Features
Glass-encapsulated NTC thermistor,
heat-resistant and highly stable
Coating of glass body and leads for electrical
insulation
For temperature measurement up to
260
°C
Short response time
Small dimensions
Leads: dumet wires (copper-clad FeNi)
Options
Alternative dimensions available on request
Delivery mode
Bulk
General technical data
Climatic category
Max. power
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
Insulation resistance
1)
Test voltage
1)
(IEC 60068-1)
(at 25
°C)
Dimensional drawing
Dimensions in mm
Approx. weight 60 mg
(in air)
(in air)
(V = 100 V DC)
(t = 1 s)
P
25
∆R
R
/R
R
T
R
δ
th
τ
c
C
th
R
ins
V
test
55/260/56
32
±2, ±3
25
approx. 0.8
approx. 9
approx. 7.2
≥
100
500
mW
%
°C
mW/K
s
mJ/K
MΩ
V DC
1) Medium: NaCl-solution; Temperature: Room temperature
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 26
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G1
G1551
Electrical specification and ordering codes
R
25
Ω
2k
2.5 k
5k
10 k
10 k
20 k
30 k
50 k
100 k
230 k
No. of R/T
characteristic
8320
7006
8326
8307
7003
8332
8344
8344
8304
8350
B
25/85
K
3406
3546
3483
3478
3612
3993
3992
3992
4072
4240
B
0/100
K
3379
3517
3456
3450
3586
3965
3965
3965
4036
4198
B
25/100
K
3420
±1%
3560
±1%
3497
±1%
3492
±1%
3625
±1%
4006
±1%
4006
±1%
4006
±1%
4092
±1%
4264
±1%
Ordering code
B57551G1202+000
B57551G1252+000
B57551G1502+000
B57551G1103+000
B57551G1103+005
B57551G1203+000
B57551G1303+000
B57551G1503+000
B57551G1104+000
B57551G1234+000
+ = Resistance tolerance
G =
±2%
H =
±3%
Note
For ordering code B57551G0202+000 and B57551G1252+000 the R/T curve is defined for short
wire length (5 mm). In dependence of the real wire length of the glass-encapsulated sensor the
wire resistance can be considered for temperatures higher than 100
°C
additionally with following
equation:
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 26
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G1
G1551
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Test conditions
∆R
25
/R
25
(typical)
< 3%
Remarks
No visible
damage
Storage in damp
heat, steady state
Rapid temperature
cycling
Storage at upper
category temperature
T: 260
°C
t: 1000 h
IEC
Temperature of air: 85
°C
60068-2-67 Relative humidity of air: 85%
Duration: 1000 h
IEC
Lower test temperature: 55
°C
60068-2-14 Upper test temperature: 200
°C
Number of cycles: 1000
< 2%
No visible
damage
No visible
damage
< 2%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 26
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G1
G1551
Reliability data according to AEC-Q200, Rev. D
Test
High temperature
exposure (storage)
Operational life
Standard
MIL-STD-202,
method 108
MIL-STD-202,
method 108
Test conditions
∆R
25
/R
25
(typical)
< 2%
< 2%
Remarks
No visible
damage
No visible
damage
No visible
damage
Temperature
cycling
Terminal strength
(leaded)
Mechanical shock
Storage at T = +125
°C
t = 1000 h
1000 h / +125
°C
Test voltage max. 0.3 V DC on
NTC
1)
JESD 22,
Lower test temperature: 55
°C
method JA-104 Upper test temperature: 125
°C
1000 cycles
Dwell time: max. 30 min at each
temperature
Transition time in air: max. 1 min
MIL-STD-202, Test leaded device integrity
method 211
Condition A: 2.27 N
2)
MIL-STD-202,
method 213,
condition C
MIL-STD-202,
method 204
Acceleration: 40
g
2)
Pulse duration: 6 ms
Number of bumps: 3, each
direction
Acceleration: 5
g
t = 20 min
12 cycles in each of 3 directions
Frequency range: 10 ... 2000 Hz
< 2%
< 1%
< 1%
No visible
damage
No visible
damage
Vibration
< 1%
No visible
damage
1) Self heating of the NTC thermistor must not exceed 0.2 K, steady state. Test conditions deviating from AEC-Q200, Rev. D.
2) Deviating from AEC-Q200, Rev. D.
Note
Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 26
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