PTC thermistors heater chips with silver metalization can be soldered with pin wire, ceramic body coated with resin, or non-coated, most used for lower temperature heating environment.

Typical application for PCB boards anti-freezing, anti-dewing, anti-moisture. Can be soldered directly on PCB boards, small size, less energy consumption.

Typical switch temperature 80C, 100C, 120C.
Ceramic body diameter 5mm, 7mm, 8mm, 10mm, 12mm, 16mm, 20mm.
Resistance @25C: 3 0hm to 3000 ohm.

Soldered Coated PTC Heater

Single Soldered PTC Heater

Insulated PTC Heater

PTC chips metallized surface for clamp contacting, which guarantees favorable thermal decoupling. Insulated wrapped,  Polyimide insulation used for higher temperature application. Available for surface and spot heating.
For lower temperature application,  PET, PU can also be used for insulation.
Surface Temperature: 50℃~280℃
Operating voltage 12V~240V

Example：

PTC Thermistor Heater 220V 110V 180C Polyimide Kapton 3 Wraps Insulated 24x15x3.2mm 100mm Cable

PTC thermistors  can be housed in aluminum case or other metal for surface and spot heating. The metal housing can be designed with mounting holes for easy installation. Metal Housing Conductive PTC  heating elements need very little mounting space and feature a high power density.
Conductive heating elements are available as heating profiles (HP) and heating discs (HT).

Surface Temperature: 50℃~280℃
Operating voltage 12V~240V
Insulation voltage can be 3750V/0.5mA/1seconds

Applications
Ultrasonic Cleanser, Steam Cooker, Ski Boot Dryer, Glue Guns, Control Valves
Heating, etc.

Metal Housing PTC Heater

Example：

PTC Thermistor Surface Heater 110V/220V 260C Aluminium Housing Flanged With Mounting Holes