2322 640 7....
Vishay BCcomponents
NTC Thermistors, Screw Threaded Sensors
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
PARAMETER
VALUE
Resistance value at 25 °C
2.2 kΩ to 470 kΩ
Tolerance on R25-value
±5%
B25/85-value
3740 to 4570 K
≈23 mW/K
Dissipation factor; note 1
Thermal time constant; note 1
≈7.5 s
Operating temperature range at:
zero dissipation
−40 to +100 °C
maximum dissipation
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.
DIMENSIONS in millimeters
0 to +55 °C
Mass
5.5
min.
∅0.6
≈1.5 g
Note
M4
1. Measured with screw mounted on an aluminium heatsink of
100 cm2, thickness 1.5 mm, in still air at Tamb = +25 °C.
2. Other R25 values based on 640 0 series are available upon
request.
37 ±3
3. Other tolerances on R25 are available upon request.
8 ± 0.1
8
max.
6.7
max.
Component outline.
ELECTRICAL DATA AND ORDERING INFORMATION
R25
(kΩ)
B25/85-VALUE
TC
(%/K)
CATALOG NUMBER 2322 640 7....
2.2
4.7
10
12
15
47
100
150
470
3977 K ±0.75%
3977 K ±0.75%
3977 K ±0.75%
3740 K ±1.5%
3740 K ±1.5%
4090 K ±1.5%
4190 K ±1.5%
4370 K ±2.5%
4570 K ±2%
−4.37
−4.37
−4.37
−4.10
−4.10
−4.46
−4.57
−4.75
−4.95
3222
3472
3103
3123
3153
3473
3104
3154
3474
R25 ±5%
Note
R25-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.
Document Number: 29065
Revision: 10-Oct-03
For technical questions contact: nlr.europe@vishay.com
www.vishay.com
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