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Temperature Sensor Products 1711 139th Lane NW Andover, MN 55304 12-04-14
precisionsensors.meas-spec.com Ph: +1 800.899.9783 www.meas-spec.com
Positive Temperature Coefcient 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 congura-
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 • Very low cost
• Virtually unlimited life • No electrical noise
• No moving parts to wear
• Efcient
Typical Applications:
• IC heater • Instrumentation heater
• Curling iron • Plug-in aroma heater
• Hair dryer • Wax motor
• Hot melt glue gun • TCXO heater
• Food warmer • Liquid Crystal display
• Diesel fuel heater • Bimetal heater
* VMAX = Maximum Voltage ** R25 = Resistance at 25˚C
Self-Regulating Heaters
Other Available Rectangular Sizes
L (INCHES) W (INCHES)
0.400 0.200
0.472 0.236
0.750 0.350
0.985 0.315
2.000 0.350
Other Available Disc Diameters
DIAMETER (INCHES)
0.100
0.160
0.200
0.250
0.300
0.350
0.400
0.500
0.550
0.600
0.750
Other Available Switch Temperatures
Switch Temperature Ts (˚C)
40˚C - 150˚C
Standard Rectangular PTC Heaters
Switch
Temp. Ts (˚C)
Vmax*
(volts)
L
(inches)
W
(inches)
T
(inches)
R25**
(Ω) MS Part #
50 50 0.472 0.236 0.050 10 PR425C050S101H
90 50 0.472 0.236 0.050 10 PR425C090S101H
135 50 0.472 0.236 0.050 10 PR425C135S101H
50 120 0.472 0.236 0.100 70 PR421D050S701H
90 120 0.472 0.236 0.100 70 PR421D090S701H
135 120 0.472 0.236 0.100 70 PR421D135S701H
Standard Disc PTC Heaters
Switch
Temp. Ts (˚C)
Vmax*
(volts)
D
(inches)
T
(inches)
R25**
(Ω) MS Part #
50 50 0.500 0.050 5 P5005C050S500H
90 50 0.500 0.050 5 P5005C090S500H
135 50 0.500 0.050 5 P5005C135S500H
50 120 0.500 0.100 40 P5010D050S401H
90 120 0.500 0.100 40 P5010D090S401H
135 120 0.500 0.100 40 P5010D135S401H
Self-Regulating
Heaters
Std. Probes
& Assemblies
PTC Thermistors
