Cartridge Heater

Cartridge heaters are cylindrical electrical heating elements installed in limited spaces in applications requiring high concentration of heat. Protected with a stainless steel sheath, the watt density can reach up to 320 watts per sq. in. and operating temperatures can go up to 1400° F.

These types of heaters are widely used for heating solids such as injection press, heating plates and other various tools or to heat liquids and gas. Cartridge heaters are used in the a wide variety of industries such as in the plastic processing and rubber parts, car industry, food processing industry and are commonly used in the chemical, electronics, medical equipment and nuclear industries.

Cartridge heaters can be manufactured in 3 main technologies, high-density (CCHC), medium range (CCMC) or low-density (CCBC) depending on the application, dimension and watt density requirements. For specific applications such as radiators and towel dryers there are double insulated cartridge heaters. Self-regulated cartridges are ideal for defrosting and evaporators and bolt heaters are typically used for mechanical assemblies.

Please review our conditions of use below.

Trivolt Industries adopts a stringent internal quality control system (QMSM-2009). Every heater is tested for resistance and dielectric. All our heaters are CSA, UL and CE approved.

  • Applications
  • Specifications
  • Constructions
  • Different Types
  • Options
  • Heating plates
  • Heating fluids
  • Plastics and Rubber industries
  • Car industry
  • Food industry
  • Chemical
  • Nuclear industry
  • Medical equipment
  • Standard voltage 230v (220v/240v)
  • Maximum voltage 480v
  • High-density (CCHC) for applications using watt densities between 0 and 220 watts per sq. in. and sheath temperatures of up to 800°C
  • Medium range (CCMC) conceived for large-size heating applications with Watt densities from 0 to 76 watts per sq. in.
  • Low-density (CCBC) developed for applications which do not use high power density. For Watt densities from 0 to 41.5 watts per sq. in.
    • Standard diameters: 0.25” to 1” (Also available in metric)
    • Standard lengths: 1.25” to 12” (Also available in metric)
    • Standard lead length: 10” (250mm)
    • High-density (CCHC) is made of highly compressed magnesia (MgO) and stainless steel sheath
    • Medium range (CCMC) the heating wire is maintained in magnesia (MgO) which is heavily compressed.
    • Low-density (CCBC) is made with standard stainless steel tube 0.5mm thick, MgO and ceramic insulator.


  • 3 Phase
  • With thermocouple
  • With or without ceramic head
  • With variable wattage
  • Square or flat
  • Double insulated
  • Self regulated
  • Ceramic cylindrical element
  • Lead wire connections
  • Ceramic beads
  • Straight braid (SS)
  • Straight Armour Cable (AC)
  • Bent
  • Lead exit 90°
  • Right angle with silicone
  • Right angle with stainless steel tube and armour cable
  • Silicone seal
  • Threaded terminals
  • Right angled sheath extension
  • Mounting flange
  • Threaded fitting

Conditions of use

  • Do not use CCHC in the open air.
  • Do not handle the heaters by their cables.
  • Ensure proper use of the regulator and the position of the probes.
  • The assembly needs to be adopted according to the charge and the temperature. But in the case of a high watt density, it may be necessary to reduce the hole fit.
  • Do not install if wattages are too high. Heaters will have a shorter lifespan.
Always use as many heaters as necessary to decrease the watts density (W/in2).
  • The use of thermal grease favors heat transfer. Special greases are available to avoid the oxidation of the boring and therefore increase the hole fit during the cartridge replacement. Take care when using grease: it must not be in contact with cables or with the ceramic head.
  • Protect power cables from :
    • bending
    • high temperatures
    • moisture
    • grease
    • material absorption
    • Thermal shock
  • The hole fit between the casing and the cartridge must be as small as possible to get good results.
  • When using CCHC at high temperatures or with an important thermal flow: it is necessary to use a regulator either external (such as a temperature probe installed at about 0.625″ from the CCHC) or internal (such as a CCHC with an integrated thermocouple).
  • In case of surrounding moisture or if you don’t use CCHC for several months: proceed with small successive heatings before operating at full use.
Cartridge Heater

Approvals & Certifications

All our manufactured heater elements are presently CSA and/or NRTCUL approved and/or CE certified. Our products are manufactured and controlled by our internal Quality Management System. This program allows TriVolt to track the quality of every component that make up our products and monitors the workmanship of every electrical heater and sensor manufactured and assembled in our facility.

CSA Std.C22.2. no 72-M1984
UL Standard 1030 6th Edition
EN 60335-1:2004
Shock and Vibration: IEC 61373; Category 1; Class B
CAN/CSA-C22.2 No. 72-10 (2013)
UL 499 Thirteenth Editions; Class 2871-02 and 2871-82.

TriVolt Industries can also comply with any customer specifications such as “Buy America”. Our facility in Westfield, MA, USA lends itself to perform final assembly of heaters and systems to accommodate any Buy-America content requirement.

We can also generate special test conditions with specific set-ups, use computer models to design or isolate problem areas.

We are continuously improving our manufacture methods and products through testing, research and development. Our high standards extend beyond our product line.