Self-Regulating
Heaters
Std. Probes
& Assemblies
Self-Regulating Heaters
Other Available Rectangular Sizes
Standard Rectangular PTC Heaters
Switch
Temp. T
s
(˚C)
50
90
135
50
90
135
V
max
*
(volts)
50
50
50
120
120
120
L
(inches)
0.472
0.472
0.472
0.472
0.472
0.472
W
(inches)
0.236
0.236
0.236
0.236
0.236
0.236
T
(inches)
0.050
0.050
0.050
0.100
0.100
0.100
R
25
**
(Ω)
10
10
10
70
70
70
MS Part #
PR425C050S101H
PR425C090S101H
PR425C135S101H
PR421D050S701H
PR421D090S701H
PR421D135S701H
L
(INCHES)
0.400
0.472
0.750
0.985
2.000
W
(INCHES)
0.200
0.236
0.350
0.315
0.350
Other Available Disc Diameters
DIAMETER
(INCHES)
0.100
0.160
MS Part #
P5005C050S500H
P5005C090S500H
P5005C135S500H
P5010D050S401H
P5010D090S401H
P5010D135S401H
0.200
0.250
0.300
0.350
0.400
0.500
0.550
0.600
0.750
Other Available Switch Temperatures
Switch Temperature T
s
(˚C)
40˚C - 150˚C
8-7-13
www.meas-spec.com
41
Positive Temperature Coefficient thermistors are truly re-
markable for their ability to function as self-regulating heating
elements. They can operate at a nearly constant temperature
over a broad range of voltage and dissipation conditions. PTC
heaters can be manufactured in many different configura-
tions. These include discs, rectangles, squares, cylinders,
and various shapes with holes to increase surface area.
Multiple PTCs can be used in parallel to provide constant
heating over a larger area.
Features:
•
No thermostat needed
•
Virtually unlimited life
•
No moving parts to wear
•
Efficient
Typical Applications:
•
IC heater
•
Curling iron
•
Hair dryer
•
Hot melt glue gun
•
Food warmer
•
Diesel fuel heater
•
•
•
•
•
•
•
Very low cost
•
No electrical noise
Instrumentation heater
Plug-in aroma heater
Wax motor
TCXO heater
Liquid Crystal display
Bimetal heater
Standard Disc PTC Heaters
Switch
Temp. T
s
(˚C)
50
90
135
50
90
135
V
max
*
(volts)
50
50
50
120
120
120
D
(inches)
0.500
0.500
0.500
0.500
0.500
0.500
T
(inches)
0.050
0.050
0.050
0.100
0.100
0.100
R
25
**
(Ω)
5
5
5
40
40
40
* V
MAX
= Maximum Voltage
** R
25
= Resistance at 25˚C
Temperature Sensor Products
precisionsensors.meas-spec.com
1028 Graphite Road, St. Marys, PA 15857
Ph: 814.834.1541 Fax: 814.834.1556
PTC Thermistors
Analog electronics
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