Chromalox SRL Self-Regulating Trace Heating Cable (Low Temperature – 150°F 65°C)

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Chromalox SRL Self-Regulating Trace Heating Cable

Trace Heating Cables & Systems – Design & Supply From Stock

Chromalox SRL Heat Trace Cables – Trace Heating

Trace Heating

Chromalox SRL self-regulating trace heating cables provide process temperature maintenance and frost protection to pipework, instrument lines, tanks and heating drums up to 65º Celsius – with ATEX, IECEx, CSA, FM, GOST and UL certification Chromalox SRL heat trace cables are suitable for Zone 1 and Zone 2 hazardous areas.

Trace Heating Cable Features

Chromalox SRL Self-Regulating

  • Energy efficient SRL self regulating cables requires less energy as less heat is required
  • Simple to install cable and can be cut to any length (see max circuit length)
  • SRL trace heating cables offer low installation costs and require less maintenance minimising downtime
  • Can be single overlapped without burnout, which simplifies heat tracing of in-line process equipment such as valves, elbows and pumps
  • Overtemperature is virtually impossible with self regulating trace heater cables
  • UL listed for use on fire protection system piping


Chromalox SRL heat trace cable wattages per metre at 10°C – 3, 5, 8 and 10 watts.

  • Approximate Cable Size : 3/8″ W x 1/8″ H
  • Maximum Maintain Temperature : 65° Celsius
  • Maximum Continuous Exposure Temperature : Power Off 85° Celsius
  • Available Models (Voltages) : 120 and 208-277V
  • Minimum Cable Bend Radius : 1-1/8″
  • Trace Heating Cable Circuit Lengths : Up to 660 feet

Chromalox SRL self-regulating trace heating cables increase power output as temperatures falls to provide guaranteed frost protection and temperature maintenance of industrial process and water pipework.


Product Offering

Cable Part Number Trace Heating Cable Description
 382678Chromalox SRL 3-1C 3W/FT 120V
382686Chromalox SRL 3-2C 3W/FT 240V
 382731Chromalox SRL 3-1CR 3W/FT 120V
 382740Chromalox SRL 3-2CR 3W/FT 240V
 383400Chromalox SRL 3-1CT 3W/FT 120V
 383419Chromalox SRL 3-2CT 3W/FT 240V
 382694Chromalox SRL 5-1C 5W/FT 120V
 382707Chromalox SRL 5-2C 5W/FT 240V
 382758Chromalox SRL 5-1CR 5W/FT 120V
 382766Chromalox SRL 5-2CR 5W/FT 240V
 383443Chromalox SRL 5-1CT 5W/FT 120V
 383451Chromalox SRL 5-2CT 5W/FT 240V
 382555Chromalox SRL 8-1C 8W/FT 120V
 382563Chromalox SRL 8-2C 8W/FT 240V
 382598Chromalox SRL 8-1CR 8W/FT 120V
382600Chromalox SRL 8-2CR 8W/FT 240V
 382460Chromalox SRL 8-1CT 8W/FT 120V
 383478Chromalox SRL 8-2CT 8W/FT 240V
 382820Chromalox SRL 10-1C 10W/FT 120V
382838Chromalox SRL 10-2C 10W/FT 240V
 382846Chromalox SRL 10-1CR 10W/FT 120V
 382854Chromalox SRL 10-2CR 10W/FT 240V
 383486Chromalox SRL 10-1CT 10W/FT 120V
 383494Chromalox SRL 10-2CT 10W/FT 240V
Chromalox SRL Thermal Output Ratings On Insulated Metal Pipe

Trace Heating

Chromalox SRL Thermal Output Ratings On Plastic Pipe With Aluminum Tape

Chromalox SRL Output Wattage at Alternate Voltages (W/Ft.)

Chromalox Part Number208V% Change In Output220V% Change In Output277V% Change In Output
Chromalox SRL 3 Heating Cable2.4-202.6-133.4+15
Chromalox SRL 5 Heating Cable4.1-184.5-105.6+13
Chromalox SRL 8 Heating Cable6.88-147.28-98.96+12
Chromalox SRL 10 Heating Cable8.7-139.2-811.1+10


Chromalox SRL Self-Regulating Trace Heating Cable - Construction

  • Twin 16 AWG Copper Buss Wires are able to provide reliable electrical current capability.
  • Semiconductive Polymer Core Matrix is the self regulating component of the cable and it’s electrical resistance varies with temperature.
  • Water Resistant Polyolefin Jacket is flame retardant and electrically insulates the matric and buss wires and provides resistance to water and some inorganic chemical solutions.
  • Tinned Copper Braid that provides additional mechanical protection in any environment, and a positive ground path.
  • High Temperature Fluoropolymer or TPR Overjacket (Optional) is a corrosion resistant, flame retardant overjacket is highly effective in many environments. TPR coatings protect against certain inorganic chemical solutions.


FM Approvals

  • FM – Factory Mutual approved for ordinary areas. UL Listed, CSA Certified for ordinary areas. UL Listed for fire protection system piping
  • FM approved for hazardous (classified) areas when used with Chromalox accessories: Class I, Div. 2, Groups B, C, D (gases, vapors)  Class II, Div. 2, Groups F, G (combustible dust)  Class III, Div. 2 (easily ignitable fibers and filings) 3 Watt rated T6 temperature class  5 and 8 Watt rated T5 temperature class 10 Watt rated T4A temperature class


Certified for hazardous (classified) areas when used with Chromalox accessories:

  • Class I, Div. 2, Groups A, B, C, D;
  • Class II, Div. 2, Groups F, G

ATEX Directive

Hazardous Area Heating Cables

Heating Cables


Chromalox video with Chris Myers Product Manager at Chromalox explaining about their heat trace products including self regulating trace heating cable.

Trace Heating

Chromalox SRL trace heating cables provide temperature maintenance and frost protection to pipework and mechanical services – typical applications include heating process pipework, instrument lines and storage tanks to maintain viscosity or prevent frost damage.

Heat Tracing Using Trace Heating Cables

Trace Heating Cables – providing process heating to pipework, vessel and bulk storage drums.


Chromalox technical manual covering trace heating cable selection, design, heat loss calculation, heat transfer fundamentals and radiant infrared heating theory.

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