Low-Voltage PTC Thermostatic Heater

Product Overview
Low-voltage PTC thermostatic heaters require only 3-24V voltage to maintain constant temperature heating. Their principle is that when power is applied, the PTC thermistor’s self-heating causes its resistance to enter the transition region, maintaining a constant surface temperature. 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 heaters are heating devices designed to utilize the constant-temperature heating characteristics of low-voltage PTC thermostatic heaters. In low- and medium-power heating applications, PTC heaters offer advantages unmatched by traditional heating elements, including constant temperature heating, no open flame, 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 heating element, silver-plated PTC heating element for sprayers

12v~220v ceramic ptc constant temperature air electric heater, cast aluminum heating plate

PTC constant temperature heating plate, ultra-low temperature heating plate

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 structures. Combining these PTC heating elements with metal components can create various high-power PTC heaters. Note: High-power, low-voltage PTC thermostatic heaters have very high power requirements. For example, a 500W heater with a 12V supply draws a normal operating current of 500 ÷ 12 = 41.67A. Therefore, the power supply must be capable of supplying at least 50A.

Application Design
Utilizing the constant-temperature heating principle of PTC thermistors, applications include hair straighteners, hair clips, hair clips, ion perms, perms, perms, ceramic perms, hair tongs, curling irons, electric combs, negative ion hair curlers, massagers, mosquito repellents, mosquito coil dispensers, fragrance dispensers, perfume dispensers, hot melt glue guns, foot bath heating, thermos cups, water heaters, coffee makers, coffee warmers, coffee heaters, water dispensers, hot and cold water dispensers, milk heaters, shower heating, electric mosquito repellents, hand warmers, dryers, electric hot plates, electric irons, electric soldering irons, electric adhesives, hair curlers, showers, shoe dryers, shoe dryers, foot warmers, electric heating plates, spectrum analyzers, spectrum therapy, physical therapy devices, infrared heating, motorcycle carburetors, electric humidifiers, and moisture-proof heating for electrical instruments. Constant temperature incubators, electronic thermos bottles, insulated boxes, insulated cups, insulated trays, insulated cabinets, electric hot plates, thermotherapy devices, coffee makers, wax melters, steam generators, humidifiers, chocolate extruders, soldering irons, acupuncture equipment, urinary catheters, foot warmers, hand dryers, cotton candy machines, massagers, small warm air heaters, hair dryers, control cabinet heating and moisture-proofing systems, monitors, electric ovens, toaster ovens, IV drip kits, medical equipment, household appliances, small appliances, and more.

Low-voltage PTC heaters
Appearance and Structure

Model	Rated Temperature Resistance 25℃/Ω	Surface Temperature /℃	Rated Voltage /V	Length L/mm	Width W/mm	Thickness T/mm
MZ9-L35W6T2.1V12T60	10~30	60±10	12	35	6	2.1
MZ9-L35W6T2.1V12T70	10~30	70±10	12	35	6	2.1
MZ9-L35W5T2.1V12T180	10~30	180±10	12	35	5	2.1
MZ9-L35W5T2.1V12T240	10~30	240±10	12	35	5	2.1
MZ9-L35W5T2.1V12T270	10~40	270±10	12	35	5	2.1
MZ9-L24W15T1.15V12T120	2~12	120±10	12	24	15	1.15
MZ9-L24W15T1.15V12T140	2~12	140±10	12	24	15	1.15
MZ9-L24W15T1.15V12T180	2~12	180±10	12	24	15	1.15
MZ9-Φ5T1.1V12T50	80~150	50±5	12	Φ5		1.1
MZ9-Φ10T1.2V12T70	5~30	70±10	12	Φ10		1.2
MZ9-Φ13T2.5V12T80	10~30	80±10	12	Φ13		2.5
MZ9-Φ8T1.85V12T90	10~30	90±10	12	Φ8		1.85
MZ9-Φ6T1.85V12T100	10~30	100±10	12	Φ6		1.85
MZ9-Φ10T2.5V12T120	10~30	120±10	12	Φ10		2.5
MZ9-Φ16T1.1V12T160	2~30	160±10	12	Φ16		1.1
MZ9-Φ20T1.5V12T200	2~30	200±10	12	Φ20		1.5

Temperatures can be designed between 50°C and 200°C, and operating voltages can be designed between 3V and 50V, depending on customer requirements.

Notes on Use
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) Unlike products designed for mains voltage, low-voltage products experience significant surface temperature fluctuations when the operating voltage fluctuates by more than 25%.
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-cased model.

Low-Voltage Metal-Cased PTC Heater

Appearance and Structure

Notes on Use
1) The heating power decreases gradually after power is applied, eventually stabilizing. Stable power depends on operating conditions. The power of the same PTC heater can vary several times depending on the 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 it cannot be controlled by adjusting the voltage.
3) PTCs are inherently highly reliable and have a long lifespan, but improper assembly can cause power and temperature instability.
4) When using multiple PTCs, they should be connected in parallel, not in series.

We can design the temperature range from 50°C to 280°C and the operating voltage range from 3V to 50V according to customer requirements.