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switchgear cabinet heater

Cabinet heater, also called enclosure heater or anti condensation heater, is used to protect customer enclosure, electric panel or switchgear cabinet against problems brought on by temperature variations such as condensation. Such conditions are likely to occur when ambient temperature is low and the equipment inside the enclosure is not powered or fails to dissipate enough heat to keep enclosure temperature above the dew point. Outdoor electrical cabinets, for example, are almost always in such conditions.

RDB series cabinet heaters are standard sized silicone rubber heaters vulcanized to the black anodized Aluminum plates in the factory. Black anodized aluminum plates are light, corrosion resistant and good for radiational heat transfer.The customer can also apply the customized silicone heaters to their own frames via PSA. Compared to other type of anti condensation heaters, silicone heating plates have the following advantages:

  • Pre-drilled standard mounting holes, easy installation
  • Hermetically sealed heating element, avoid problem of oxidation
  • Low surface temperature, touch safe
  • Double insulation of moisture proof silicone rubber and alkali-free glass fiber, suitable for for harsh environment
  • Wide operating temperature range: -60°C to 200°C
  • Fanless radiation heating, silent operation, long lifetime
  • Thin profile, space saving


rdb cabinet heaterRated Voltage:                      120V, 230V
Dielectric Strength:               2000V/min
Insulation Resistance:          >500M
Working temperature:          -60°C -- 250 °C

Model No. Wattage(W) Size (mm)
RDB-00011A 50 90x150
RDB-00011B 100 120x185
RDB-00011C 150 150x200
RDB-00008A 70 100x230
RDB-00008B 30 60x100
RDB-00008C 15 60x100
RDB-00008D 45 80x90
RDB-00008E 75 80x140
RDB-00008H 140 100x230
RDB-00008N 300 200x300
RDB-00034-GP1 140 164x218
RDB-00034-GP2 140 216x230
RDB-00034-GP3 250 150x330
RDB-00034-GP4 500 330x440

Wattage Selection Diagram

All electrical cabinets emit certain amount of heat to the surroundings through the surface. So the required anti condensation power is proportional to the effective surface area.

wattage selection diagram for anti condensation heating

The table below shows the effective surface area calculation for control panel / electric cabinet mounted at different locations.

surface area calculation for enclosure heating

Typical applications

Provides freeze prevention and condensation build-up protection in enclosures where supplemental heat is needed:

  • Electric cabinet
  • Switchgear cabinet heater
  • ATM machine
  • Control panel
  • Anti-flocculation box
  • Traffic signal control box
  • Light box
  • Vending machine
  • Motor space heater

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