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Code No. FCH M-T-D, FIREROD Cartridge Heaters (Made-to-Order)

  • Part temperatures up to 1400ºF (760ºC) on Incoloy® sheath
  • Watt densities up to 400 W/in2 (62 W/cm2)
  • Maximum voltage up to 480V
  • 1 in. (25 mm) units: ±0.003 in. (±0.08 mm)
  • All other units: ±0.002 in. (±0.05 mm)
  • All units to 4 1/2 in. (114 mm) long: ±3/32 in. (±2.4 mm)
  • 1/8 in. diameter units over 4 1/2 in. (114 mm) long: ±3%
  • All other units over 4 1/2 in. (114 mm) long: ±2%
  • 1/8 in. units: +10%, -15%
  • All other units: +5%, -10%
  • 1/8 in. units: +15%, -10%
  • All other units: +10%, -5%
Resistance changes with temperature. There are three circumstances under which resistance can be measured:
  1. Room temperature (before use): nominal ohms are 90% of ohm’s law calculation.
  2. Room temperature (after use): nominal ohms are 95% of ohm’s law calculation.
  3. At temperature (during use): depending on application nominal ohms are approximately 100% of ohm’s law.
Note: Resistance and wattage values are approximate depending on application conditions.

Units to 12 in. (305 mm) long: 0.005 in. (0.1 mm) per 6 in. (152 mm) length. Standard camber tolerance varies as the square of the length, in feet, is multiplied by 0.020 in. (0.5 mm). For example, a 36 in. (914 mm) FIREROD has a camber tolerance of 0.020 in. x (3)2 = 0.180 in. Normally, slight camber does not present a problem since the heater will flex enough to fit into a straight, close fit hole.

Component Recognition File Numbers
  • UL® component rated to 480VAC
  • CSA component rated to 240VAC
  • VDE component rated to 480VAC
  • CE component rated
Note: Not all options or combination of options are covered. UL®, CSA, VDE and CE marking is available upon request.


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FIREROD® Cartridge Heaters-2

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Unit of Measure: Imperial | Metric | Both 

Specifications · Options · Standard Lead Specifications · Features and Benefits · Typical Applications · Heating Solids · Heating Liquids/Surface Heating and Immersion · Heating Gases · Heating Within a Vacuum


Heater Style

FIREROD® Cartridge Heaters (Heater Style)
FIREROD® Cartridge Heaters
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Straight Options

SFL, Swaged-in Flexible Leads
SSSH, Straight Stainless Steel Hose
TSL, Teflon® Seal and Leads
SSSB, Straight Stainless Steel Braid

Right Angle Options

RAL, Right Angle Lead
RASSH, Right Angle Stainless Steel Hose
RASSB, Right Angle Stainless Steel Braid

Termination Options

SRSL, Silicone Rubber Seal and Lead
ULP, UL® Listed Plug
ES, Epoxy Seal
GL, Ground Lead
PASS, Passivation
TB, Terminal Box
CBI, Ceramic Bead Insulation
PT, Post Terminals

Mounting Options

TF, Threaded Fitting
F, Flange
LR, Locating Ring

Other Options

J, Thermocouple
K, Thermocouple
Style A, Internal Thermocouple
Style B, Internal Thermocouple
Style C, Internal Thermocouple
DW, Distributed Wattage
DV, Dual Voltage

Standard Lead Specifications

Lead length tolerances:
1 to 36 in. (25 to 914 mm) = -1/2 in. (13 mm), +1 1/2 in. (38 mm)
> 36 to 72 in. (914 to 1829 mm) = -1, +3 in. (-25 + 76 mm)
> 72 in. (1829 mm) = ±4 in. (102 mm)

SS hose and braid tolerances: same as lead wire.

Units constructed with 480V require MGT or Teflon® leads. If connecting heaters in series above 300V, MGT leads are also required.

GGS, 300V, 482ºF (250ºC)
MGT, 600V, 842ºF (450ºC)
Teflon®, 600V, 392ºF (200ºC)
Silicone rubber, 600V, 302ºF (150ºC)

Features and Benefits

Nickel-chromium resistance wire
  • Assures even and efficient distribution of heat to the sheath
    Conductor pins
  • Provides a metallurgical bond to the resistance wire
  • Ensures a trouble-free electrical connection
    Magnesium oxide insulation of specific grain and purity
  • Results in high dielectric strength and contributes to faster heat-up
    Incoloy® sheath
  • Resists oxidation and corrosion from many chemicals, heat and atmospheres
    Minimal spacing between the element wire and sheath
  • Results in lower internal temperature
  • Accommodates a design with fewer or smaller heaters operating at higher watt densities
    UL® and CSA approved flexible stranded wires
  • Lead insulation rated to temperatures of 480ºF (250ºC)
    Patented lead adapter (LA) method
  • Allows same day shipment on more than 150,000 configurations of stock FIREROD® heaters and lead combinations

  • Typical Applications

    • Semiconductor chamber heating
    • Semiconductor wafer lead connection
    • Semiconductor wire and die bonding
    • Freeze protection and deicing of equipment in cold climates or applications
    • Humidity control
    • Patient comfort heating used in medical devices
    • Mold die and platen heating
    • Seal bars used in packaging equipment
    • Test sample heating in gas chromatography equipment

    Heating Solids

    These heaters are inserted into a close fit hole (i.e. platens, dies and molds)

    Heating Liquids/Surface Heating and Immersion

    These are used as an immersion heater placed either directly in the liquid, or in a protective well (Recommended for immersion in water or 90 plus percent water soluble solutions).

    Heating Gases

    These heaters are mounted in pipes or vessels through which gases pass. They can be placed in protection tubes, making access and wiring easier.

    Heating Within a Vacuum

    These heaters are mounted in a vacuum vessel for radiant energy transfer.


     width= Maximum Allowable Watt Density for FIREROD Cartridge Heaters
    (PDF, 75KB)

     width= FIREROD Cartridge Heaters (Made-to-Order) Specification Sheet

     Made-to-Order Mounting Options 

    Made-to-Order Mounting Options

    Made-to-Order Mounting Options

     Made-to-Order Straight Options 

    Made-to-Order Straight Options

    Made-to-Order Straight Options

     Made-to-Order Right Angle Options 

    Made-to-Order Right Angle Options

    Made-to-Order Right Angle Options

     Made-to-Order Termination Options 

    Made-to-Order Termination Options

    Made-to-Order Termination Options

     Made-to-Order Options 

    Made-to-Order Options

    Made-to-Order Options

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