NTC thermistors for
temperature measurement
Glass-encapsulated sensors
with insulation
Series/Type:
Date:
B57551G, B57551G1
March 2013
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Temperature measurement
Glass-encapsulated sensors with insulation
B57551G, B57551G1
G551/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
±1, ±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 22
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G, B57551G1
G551/G1551
Electrical specification and ordering codes
R
25
Ω
2k
10 k
10 k
30 k
100 k
No. of R/T
characteristic
8401
8307
7003
7002
8304
B
25/85
K
3420
3478
3612
3973
4072
B
0/100
K
3390
±1%
3450
3586
3944
4036
B
25/100
K
3436
3492
±1%
3625
±1%
3988
±1%
4092
±1%
Ordering code
B57551G0202+000
B57551G1103+000
B57551G1103+005
B57551G1303+005
B57551G1104+000
+ = Resistance tolerance
F =
±1%
G =
±2%
H =
±3%
Note
For ordering code B57551G0202+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 22
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G, B57551G1
G551/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 22
Temperature measurement
Glass-encapsulated sensors with insulation
B57551G, B57551G1
G551/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 to 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 22
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