Self-Regulating Heaters

Features

No thermostat needed
Virtually unlimited life
No moving parts to wear
Very low cost
No electrical noise
Efficient

Description

Positive Temperature Coefficient thermistors are truly remarkable 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 configurations. 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.

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PTC Thermistor Self-Regulating Heater Datasheet (185K) ]

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Standard Rectangular PTC Heater Product Information
Part Number	Switch Temp. T_s(°C)¹	V_max* (volts)	Customize Solution	L (inches)	W (inches)	T (inches)	R₂₅** (Ω)
PR425C050S101H	50	50		0.472	0.236	0.050	10
PR425C090S101H	90	50		0.472	0.236	0.050	10
PR425C135S101H	135	50		0.472	0.236	0.050	10
PR421D050S701H	50	120		0.472	0.236	0.100	70
PR421D090S701H	90	120		0.472	0.236	0.100	70
PR421D135S701H	135	120		0.472	0.236	0.100	70
¹ Also available in 40ºC – 150ºC * Vmax = Maximum Voltage ** R25 = Resistance at 25°C

Standard Disc PTC Heater Product Information
Part Number	Switch Temp. T_s(°C)¹	V_max* (volts)	Customize Solution	D (inches)	T (inches)	R₂₅** ( Ω)
P5005C050S500H	50	50		0.500	0.050	5
P5005C090S500H	90	50		0.500	0.050	5
P5005C135S500H	135	50		0.500	0.050	5
P5010D050S401H	50	120		0.500	0.100	40
P5010D090S401H	90	120		0.500	0.100	40
P5010D135S401H	135	120		0.500	0.100	40
¹ Also available in 40ºC – 150ºC * Vmax = Maximum Voltage **R25 = Resistance at 25ºC