PTC Thermistors for Constant Temperature Heating

Product Overview
The constant temperature heating characteristics of PTC thermistors for constant temperature heating are determined by the material properties. The principle is that when power is applied to the PTC thermistor, self-heating causes the component’s temperature to rise, causing the resistance value to enter the transition region and the current to drop rapidly. Consequently, the surface temperature of the PTC thermistor remains constant. This temperature is dependent solely on the PTC thermistor’s Curie temperature and the applied voltage, and is largely independent of the ambient temperature.

PTC constant temperature heaters are heating devices designed to utilize the constant temperature heating characteristics of PTC thermistors. In low- and medium-power heating applications, PTC heaters offer advantages over traditional heating elements, such as constant temperature heating, no open flames, high heat conversion efficiency, minimal influence from power supply voltage, and a long lifespan. Their use in electric heating appliances is increasingly favored by R&D engineers.

PTC thermistors for constant temperature heating can be manufactured in a variety of shapes and specifications. Common shapes include discs, rectangles, strips, rings, and honeycomb pores. Combining the above-mentioned PTC heating elements with metal components can create various high-power PTC heaters.

Application Design
Utilizing the constant-temperature heating principle of PTC thermistors, these devices can be designed for applications such as hair straighteners, hair clips, hair clips, perms, perms, ceramic perms, hair tongs, curling irons, electric combs, negative ion hair curlers, massagers, mosquito repellents, mosquito repellents, mosquito coil dispensers, fragrance dispensers, perfume dispensers, hot melt glue guns, heated foot baths, laminating machines, thermos cups, water boilers, coffee machines, coffee warmers, coffee heaters, water dispensers, hot and cold water dispensers, milk heaters, water heaters, shower heaters, electric mosquito repellents, hand warmers, dryers, electric hot plates, electric irons, electric soldering irons, electric thermal adhesives, curling irons, showers, fan heaters, drying rooms, electric heaters, electric heaters, air conditioning systems, air conditioning heating systems, space heaters, air heating systems, hot water kettles, Shoe dryers, shoe drying devices, foot warmers, electric heating plates, spectrum analyzers, spectrum therapy, physical therapy devices, infrared heating, clothes dryers, motorcycle carburetors, electric humidifiers, moisture-proof heating for electrical instruments, small crystal device constant temperature baths, constant temperature incubators, electronic thermos bottles, insulated boxes, insulated cups, insulated trays, insulated cabinets, insulated tables, electric heating plates, thermal therapy devices, hot coffee machines, steam beauty treatments, wax melters, steam generators, humidifiers, humidifiers, chocolate extruders, hot packs, electric soldering irons, acupuncture, urinary catheters, foot warmers, hand dryers, cotton candy machines, massagers, liquefied gas cylinder heating, small warm air heaters, hair dryers, room heaters, dryers, dry cabinets, clothes dryers, industrial drying equipment, Electric dust collector hopper heater, train locomotive electric heater, mold heating, control cabinet heating moisture-proof, monitor moisture-proof, electric oven, electric toaster, infusion box, medical equipment, household appliances, daily appliances, small appliances…etc.

PTC heater Chinese manufacturer

The structure and size of PTC heating plate

Model Parameters

Ring Temperature Resistance 25℃/Ω	Surface Temperature /℃	Maximum Voltage /حرفهای	Diameter D/mm	Length L/mm	Width W/mm	Thickness T/mm
500~1500	50	270	8			3
300~800	85	140		16	11	2.5
150~400	90	140		16	11	2.5
600~1500	100	270	20			2.5
500~1500	110	270		16	11	2.2
500~1500	130	270	20			2.2
200~800	150	140	10.8			2.2
200~800	155	270	10.8			2.2
500~1500	155	270	10.8			2.2
1.5~5K	170	140		5	4	1.6
150~500	175	140	10.8			2.2
500~1500	180	270	10.8			2.2
200~800	185	270	10.8			2.2
1~3K	195	270	8			2.5
800~2K	230	270		19	12	2.2
800~2K	250	270	13			2.5
2~5K	250	270	20			2.5
300~1K	250	140		23.5	10	2.2
800~2K	255	270		23.5	10	2.2
500~2K	275	270		35	10	2.1
300~800	280	140		24	15	2.5
0.8~3.5K	280	270		24	15	2.5

Usage Notes
1) The PTC heater features automatic constant temperature control, eliminating the need for a temperature control system. It is the core component of all PTC heaters.
2) Four electrode types are available: electroless nickel + silver, melt-blown aluminum, printed aluminum + silver, and printed aluminum.
3) The operating voltage range is very wide. Even with a 2x increase in operating voltage, the surface temperature changes minimally.
4) When multiple PTC heaters are used together, they should be connected in parallel, not in series.
5) This product does not have lead wires or insulation. If this is not feasible, please select a model with an external insulation film or a metal housing.

Metal shell PTC heater

Dimensions and structure of metal shell PTC heater

Dimensions and Structure of Externally Insulated Film PTC Heaters

Model Parameters

Length/mm	Width/mm	Thickness/mm	Surface Temperature/℃	Insulation Withstand Voltage/V	Operating Voltage/V
30~120	20	5.0	60~280	3750	100~240
30~120	30	6.0	60~280	3750	100~240
30~120	33	7.0	60~280	3750	100~240
30~120	35	7.0	60~280	3750	100~240
30~120	40	7.0	60~280	3750	100~240
30~120	43	7.0	60~280	3750	100~240
30~120	46	7.0	60~280	3750	100~240
30~120	56	7.0	60~280	3750	100~240

Temperatures can be designed between 60°C and 280°C, and operating voltages can be designed between 12V and 240V, depending on customer requirements.

Usage Precautions
1) After power is applied, the heating power decreases gradually and then stabilizes. Stable power depends on operating conditions. The power of the same PTC heater can vary several times depending on operating conditions. The faster the heat dissipation, the greater the stable power; the higher the PTC surface temperature, the higher the power.
2) The surface temperature of the PTC heater is controlled by the PTC itself and can be controlled by disconnecting the circuit, but not by adjusting the voltage.
3) While PTCs are inherently highly reliable and have a long lifespan, improper assembly can result in unstable power and temperature.
4) When using multiple PTCs, they should be connected in parallel, not in series.

Externally Insulated Film PTC Heaters

Dimensions and Structure of Externally Insulated Film PTC Heaters

Model Parameters

Length (mm)	Width (mm)	Thickness (mm)	Surface Temperature (°C)	Insulation Withstand Voltage (حرفهای)	Operating Voltage (حرفهای)
24	10	3.0~3.5	85~280	3750	100~240
24	15	3.0~3.5	85~280	3750	100~240
35	8	3.0~3.5	85~280	3750	100~240
35	10	3.0~3.5	85~280	3750	100~240
35	13	3.0~3.5	85~280	3750	100~240
35	15	3.0~3.5	85~280	3750	100~240
48	8	3.0~3.5	85~280	3750	100~240
48	10	3.0~3.5	85~280	3750	100~240
48	13	3.0~3.5	85~280	3750	100~240
48	15	3.0~3.5	85~280	3750	100~240
60	8	3.0~3.5	85~280	3750	100~240
60	10	3.0~3.5	85~280	3750	100~240
60	13	3.0~3.5	85~280	3750	100~240
60	15	3.0~3.5	85~280	3750	100~240
70	8	3.0~3.5	85~280	3750	100~240
70	10	3.0~3.5	85~280	3750	100~240
70	13	3.0~3.5	85~280	3750	100~240
70	15	3.0~3.5	85~280	3750	100~240
70 above	15	3.0~3.5	85~280	3750	100~240