NTC Thermistors, Screw Threaded Sensors
2322 640 7....
Vishay BCcomponents
Document Number: 29065
For technical questions contact: nlr.europe@vishay.com
www.vishay.com
Revision: 10-Oct-03
129
FEATURES
Easy mounting
Rugged construction
APPLICATIONS
Suitable for many applications, especially when a good
insulation and/or a good thermal contact with the chassis is
required.
Thermistor with negative temperature coefficient and two
solid tinned copper leads.
The device is mounted in the head of aluminium screws
size M4.
PACKAGING
The thermistors are packed in cardboard boxes; the smallest
packaging quantity is 100 units.
QUICK REFERENCE DATA
Note
1. Measured with screw mounted on an aluminium heatsink of
100 cm
2
, thickness 1.5 mm, in still air at T
amb
= +25
C.
2. Other R
25
values based on 640 0 series are available upon
request.
3. Other tolerances on R
25
are available upon request.
PARAMETER
VALUE
Resistance value at 25
C
2.2 k
to 470 k
Tolerance on R
25
-value
5%
B
25/85
-value
3740 to 4570 K
Dissipation factor; note 1
23 mW/K
Thermal time constant; note 1
7.5 s
Operating temperature range at:
zero dissipation
-
40 to +100
C
maximum dissipation
0 to +55
C
Mass
1.5 g
MARKING
The last 4 digits of the catalog number are printed on the stud
in accordance with the information in Electrical Data and
Ordering Information Table.
MOUNTING
By means of a washer and M4 nut supplied with the device.
Applied torque shall not exceed 1.2 Nm. Leads to be
soldered.
ELECTRICAL DATA AND ORDERING INFORMATION
Note
R
25
-values, temperature coefficients and catalog numbers.
The thermistors have a 12-digit catalog number starting with 2322 640 7. The subsequent 4 digits indicate the resistance value and tolerance.
R
25
(k
)
B
25/85
-VALUE
TC
(%/K)
CATALOG NUMBER 2322 640 7....
R
25
5%
2.2
3977 K
0.75%
-
4.37
3222
4.7
3977 K
0.75%
-
4.37
3472
10
3977 K
0.75%
-
4.37
3103
12
3740 K
1.5%
-
4.10
3123
15
3740 K
1.5%
-
4.10
3153
47
4090 K
1.5%
-
4.46
3473
100
4190 K
1.5%
-
4.57
3104
150
4370 K
2.5%
-
4.75
3154
470
4570 K
2%
-
4.95
3474
DIMENSIONS
in millimeters
Component outline.
8
max.
8 0.1
6.7
max.
0.6
37 3
5.5
min.
M4
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