Chromalox SRP Self-Regulating Trace Heating Cable (Process Temperature – 230°F 110°C)

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SRP Self-Regulating Process Temperature Trace Heating CableChromalox

Trace Heating cable

chromalox srp

Chromalox SRP self-regulating trace heating cables provide process temperature maintenance and frost protection to pipework, instrument lines, tanks and drums.

With CSA, FM, UL, IECEx & ATEX certification Chromalox SRP heat trace cables are suitable for Zone 1 and Zone 2 hazardous areas.


  • Energy efficient SRP 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)
  • SRP 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
  • Chromalox U-Series Connection Kits reduce installation time


Chromalox SRP heat trace cable is available in 5, 10 and 15 w/ft.

  • Approximate Cable Size : 0.47″ W x 0.20″ H
  • Maximum Maintain Temperature : 110° Celsius
  • Maximum Continuous Exposure Temperature : Power Off 135° Celsius
  • Available Models (Voltages) : 120 and 208 – 277V
  • Minimum Cable Bend Radius : 1-1/8″
  • Trace Heating Cable Circuit Lengths : Up to 750 feet

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

Part Number Trace Heating Cable DescriptionVoltageW/ft
387161Chromalox SRP 5-1C120V5
387217Chromalox SRP 5-2C240V
387188Chromalox SRP 5-1CT120V
387225Chromalox SRP 5-2CT240V
387102Chromalox SRP 10-1C120V10
387170Chromalox SRP 10-2C240V
387129Chromalox SRP 10-1CT120V
387196Chromalox SRP 10-2CT240V
387065Chromalox SRP 15-1C120V15
387110Chromalox SRP 15-2C240V
387073Chromalox SRP 15-1CT120V
387137Chromalox SRP 15-2CT240V

Chromalox SRP Thermal Output Ratings On Insulated Metal Pipe

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

Chromalox Part Number208V% Change In Output220V% Change In Output277V% Change In Output
Chromalox SRP 53.85-204.25-136.45+15
Chromalox SRP 108.3-188.80-1012.50+13
Chromalox SRP 1512.75-1413.50-918.45+12


Cable Construction

Chromalox SRP Self-Regulating Trace Heating Cable - Construction


  • A Twin 16 AWG Copper Buss Wires are able to provide reliable electrical current capability.
  • B Semiconductive Polymer Core Matrix is the ‘self regulating component of the cable and it’s electrical resistance varies with temperature.
  • C Fluoropolymer Jacket is flame retardant and electrically insulates the matric and buss wires and provides corrosion resistance.
  • D Tinned Copper Braid that provides additional mechanical protection in any environment, and a positive ground path.
  • E High Temperature Fluoropolymer Overjacket is a corrosion resistant, flame retardant overjacket is highly effective in many environments.


CSA Certified

  • Class I, Division 2, Groups B, C, D
  • Class II, Division 2, Groups F, G
  • Class III

FM Approved

  • Class I, Division 2, Groups B, C, D
  • Class II, Division 2, Groups F, G
  • Class III

UL Recognized Component AWM Style 20565

Hazardous Area Heating Cables

Hazardous Area Heating Cables

Rated T4

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

Trace Heating

Chromalox SRP trace heating cables provide temperature maintenance and frost protection to pipework and mechanical services in all industries – 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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