Ideal for heat tracing, freeze protection, and process maintenance applications

Suitable for outdoor use

Manually set your desired temperature

Bulb and capillary control

Three temperature range choices to fit your application

Specifications

  • Up to 277VAC
  • 22 amp maximum
  • Differential 6°F (3°C)
  • Average accuracy of ±5°F (3°C)
  • Maximum exposure temperature range: -40 to 160°F (-40 to 71°C)
  • Enclosure NEMA 3R rated, for outdoor use
  • Tinned copper bulb and capillary, 10 feet (3m) long
  • Single pole double throw (SPDT) contacts
  • Bare wire power and heater connection
Bulb Dimensions
Part Number Diameter Length
Inches mm Inches mm
TB250N-150 19/64 7.5 2 1/2 63.5
TB250N-250 19/64 7.5 2 1/2 63.5
TB250N-350 3/8 9.5 2 1/4 57.2
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Why Choose Heating Elements Plus?

Heating Elements Plus is the online sales division of Protherm Industries, Inc., based in Nashville, Tennessee. With over 40 years of experience in process and industrial heating, we are more than just a supplier—we are a trusted partner who understands the demands of your industry.

Whether you’re looking to place an order directly through our secure online store or need help from one of our engineers, we are here to provide fast, reliable, and knowledgeable service.

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Self Regulating Heat Trace Cable

Self Regulating Heat Trace Cable

Self-Regulating Heat Cable is commonly used for freeze protection of water and drain lines, and for protecting residential and commercial roofs and gutters from ice dams. The temperature rating is for the heat cable’s outer jacket and has nothing to do with the actual temperature of the cable. For most residential applications, you will choose the low temperature cable, as most water lines in the home never exceed 150 degrees.

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