2322 626 1....
Vishay BCcomponents
NTC Thermistors, Glass Encapsulated Miniature Bead
FEATURES
•
Small diameter
•
Quick response to changes in temperature
•
High stability over long time periods
•
High temperature operation
•
Resistant to aggressive environments
•
High degree of isolation between tip and environment
QUICK REFERENCE DATA
PARAMETER
Resistance value at 25
°
C
Tolerance on R25-value
B25/85-value
Tolerance on B25/85-value
Maximum dissipation at 55
°
C
Dissipation factor
Response time; note 1
Thermal time constant
Operating temperature range:
at zero dissipation
at maximum dissipation
Dielectric withstanding voltage (RMS)
between terminals and glass envelope
Insulation resistance between
terminals and glass envelope at 100 V
Mass
Note
1. Response time in silicone oil MS200/50. This is the time needed
for the sensor to reach 63.2% of the total temperature difference
when subjected to a temperature change from 25
°
C in air to
85
°
C in oil.
VALUE
1 k
Ω
to 1 M
Ω
±
5%;
±
10%
2075 to 4100 K
±
5%
100 mW
≈
1.2 mW/K
≈
1 s
≈
10 s
−
55 to +200
°
C or
−
55 to +300
°
C
0 to 55
°
C
min. 1 500 V
min. 100 M
Ω
≈
0.27 g
APPLICATIONS
Temperature measurement and control.
Bead thermistor with negative temperature coefficient, in a
glass envelope with two tinned durnet (CuNiFe) leads. The
device is non-flammable.
MARKING
The thermistors are marked with four colored dots on the
glass envelope; see Component Outline drawing and
Electrical Data and Ordering Information table.
MOUNTING
By soldering in any position.
PACKAGING
The thermistors are packed in cardboard boxes; the smallest
packaging quantity is 100 units.
ELECTRICAL DATA AND ORDERING INFORMATION
R
25
(k
Ω
)
1
2.2
4.7
10
22
47
100
220
470
1000
B
25/85
-VALUE
2075 K
±
5%
2285 K
±
5%
2485 K
±
5%
3750 K
±
5%
3560 K
±
5%
3750 K
±
5%
3900 K
±
5%
3860 K
±
5%
3950 K
±
5%
4100 K
±
5%
TC
(%/K)
−
2.3
−
2.6
−
2.8
−
4.2
−
4.0
−
4.2
−
4.4
−
4.3
−
4.5
−
4.6
MAX.
TEMPERATURE
(°C)
200
200
200
200
200
300
300
300
300
300
CATALOG NUMBER
2322 626 1....
R
25
±
10%
R
25
±
5%
3102
2102
3222
2222
3472
2472
3103
2103
3223
2223
3473
2473
3104
2104
3224
2224
3474
2474
3105
2105
COLOUR CODE
(see Component outline drawing and note 1)
I
brown
red
yellow
brown
red
yellow
brown
red
yellow
brown
II
black
red
violet
black
red
violet
black
red
violet
black
III
red
red
red
orange
orange
orange
yellow
yellow
yellow
green
Note
1. Dependent upon R25-tolerance, the dot IV is coloured as follows:
a) for R25
±
5%, dot IV is coloured gold;
b) for R25
±
10%, dot IV is coloured silver.
2. R
25
-values, temperature coefficients, catalog numbers and coding.
3. The thermistors have a 12-digit catalog number starting with 2322 626 1. The subsequent 4 digits indicate the resistance and tolerance.
Document Number: 29061
Revision: 10-Oct-03
For technical questions contact: nlr.europe@vishay.com
www.vishay.com
121
Analogue and Mixed Signal
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