Maltec-H PTC Air Heaters

What is PTC?

PTC stands for “Positive Temperature Coefficient”. PTC is a ceramic-based electrical component with temperature-dependent resistance that is used as a heating element. Its positive temperature coefficient allows electrical current to flow better at low temperatures than at high temperatures. As the temperature rises, the PTC’s natural resistance increases while its current conductivity and power output decrease until a state of equilibrium is reached and the current can barely flow anymore. That’s the so-called PTC effect. Thanks to their self-regulating characteristic, PTC heating elements cannot overheat, which makes this heating technology particularly safe and reliable.

Type of PTC Thermistor

PTC heater is a unique heating solution, make use of PTC thermistors to deliver secure, effective heat transfer. While many heaters use typical resistors, a thermistor is a special type of resistor dependent on temperature. PTC thermistors specifically increase resistance with a rise in temperature. PTC thermistors are divided into two groups, based on the materials used, their structure and the manufacturing process.

• The first group of PTC thermistors is comprised of silistors, which use silicon as the semiconductive material. They are used as PTC temperature sensors for their linear characteristic.
• The second group is the switching type PTC thermistor. When this type of thermistor is heated the resistance decreases until it reaches a certain temperature and then subsequently increases. These characteristics cause the switching type to be widely used in PTC heaters, sensors, and other devices especially as PTC self-regulating heaters.

Standard and Custom Thermistor Configurations

At Dpstar Group, we manufacture our own PTC thermistors for use in our PTC heaters. We currently offer our thermistors in three standard shapes: round, rectangular, and square. We can also create additional custom sizes and configurations to fit a particular application’s requirements or to accommodate a specific order quantity. Our rectangular thermistors are available in a wide variety of models and can be portioned into smaller sizes, with the resistance of segmented PTC thermistors increasing in proportion to their size. For low-volume round PTC thermistors with unique dimensions, square PTC thermistors with a slightly higher temperature can also work; this allows for faster delivery and reduced minimum order quantities.

Applications

• Heater Fan
• Heating Plates
• Drying Machines
• Hair Dryer
• Hot melt glue gun
• Foot warmer
• Diesel/fuel heater
• Iron
• Transportation
• Healthcare
• Food and beverage
• Public spaces
• Recreational