Strip away the housing, the fan, the fittings — every PTC heating element, regardless of what it’s built into, comes down to the same three physical parts doing the same job.

What’s actually inside it

A PTC heating element is a disc, wafer or plate of doped barium titanate ceramic with electrodes fired or plated onto its faces, and lead wires attached to carry current in. That’s the whole functional core — everything else (housing, fins, mounting brackets) exists to get heat into or out of that core efficiently. Our Heating Chip product line is essentially this core sold on its own, for OEM buyers who want to embed it directly into their own housing.

Electrode configuration decides how the element mounts

Because the electrodes sit on the ceramic’s faces or edge, their layout determines how the element can be wired into a larger part. Side-edge lead wire types keep the profile flat; single-surface lead wire types put both connections on one face for easy PCB or bracket mounting; dual-surface electrode types sandwich between two contact plates. All three are covered in the Heating Chip category.

From bare element to finished heater

Once you understand the bare element, the rest of our product line is really just packaging decisions built around it: seal it in a rigid housing and it becomes a Cased Heater; wrap it in insulating film and it’s an Insulated Heater; mount it in a fluid path and it’s a Liquid Heater; pair it with fins and airflow and it’s an Air Heater. Every format runs on the same underlying electrical behavior described in how does a PTC heater work.

For the material science behind why the ceramic behaves this way in the first place, see what is a positive temperature coefficient. PTCWORKS formulates and sinters this ceramic in-house — reach our team if you’re specifying an element for a new design, or browse the full catalog for existing configurations.