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Cartridge Heater Configurations

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Standard Cartridge Heater Configurations

Below is a complete list of all cartridge heater configurations. Cartridge Heaters are high temperature swaged units manufactured with magnesium oxide insulation. Every Thermal Corporation cartridge heater is a premium quality unit with an incoloy sheath which offers a higher temperature rating and higher resistance to chemical corrosion. These can be ordered standard or custom. Thermal Corporation cartridge heaters are made to your exact specifications, and all products are made in the USA!

Visit our accessories page for high temperature wire and connection supplies.

Ready to order? Click here to request a quote by selecting Cartridge Heater from the Select a Product drop-down!

Have any questions?

Contact Customer Service by phone at (800) 633-2962, by email at sales@thermalcorp.com, or chat with us using our chat feature located at the bottom right of the page!

Configuration Style & DescriptionConfiguration Diagram
Crimped Leads
Style CL

Flexible stranded lead wire is fused to the end of the solid conductor and electrically insulated with 2″ of high temperature sleeving.
diagram of Thermal Corporation cartridge heater configuration style CL - crimped leads
Ceramic Bead
Style CB

Ceramic bead insulation protects the leads from high temperature environments (above 500°F / 260°C). The beads fit over the solid conductors which extend far enough to reach a cooler area where flexible wires can be attached.
diagram of Thermal Corporation cartridge heater configuration style CB - ceramic bead
Swaged Lead
Style SL

Internally connected leads offer maximum flexibility at point of entry to cap, allowing a high degree of flexing as well as the ability to bend the leads sharply adjacent to the cartridge heater.
diagram of Thermal Corporation cartridge heater configuration style SL - internally connected leads
Swaged Braid
Style SB

Stainless steel braid protects leads from abrasion or sharp equipment while allowing flexibility. Available with or without an eyelet.
diagram of Thermal Corporation cartridge heater configuration style SB - straight braid
Swaged Hose
Style SH

Stainless steel hose protects leads from abrasion on sharp equipment while allowing flexibility.
diagram of Thermal Corporation cartridge heater configuration style SH - straight hose
Post Terminals
Style PT

Post terminals provide a fast, neat connection to ring, spade connectors or bus strips. Threaded 10-24 studs are brazed to the solid nickel conductor. Available only in 5/8″ and larger.
diagram of Thermal Corporation cartridge heater configuration style PT - post terminals
Mica Disc
Style MD
Internally swaged leads. Provides a smaller unheated section allowing for shorter heaters.
diagram of Thermal Corporation cartridge heater configuration style MD - mica disc
Mica Disc with Braid
Style MDB

Stainless steel braid protects leads from abrasion or sharp equipment while allowing flexibility. Available with or without an eyelet.
diagram of Thermal Corporation cartridge heater configuration style MDB - mica disc with braid
Mica Disc with Hose
Style MDH

Stainless steel hose protects leads from abrasion on sharp equipment while allowing flexibility.
diagram of Thermal Corporation cartridge heater configuration style MDH - mica disc with hose
Teflon Leads
Style ST

Internally swaged teflon leads seal and resist moisture and oil. Teflon rated at 480°F. We recommend leaving 1/4" of lead end sticking out of mold.
diagram of Thermal Corporation cartridge heater configuration style ST - teflon leads
Teflon Leads with Braid
Style STB

Stainless steel braid protects leads from abrasion or sharp equipment while allowing flexibility. Available with or without an eyelet.
diagram of Thermal Corporation cartridge heater configuration style STB - teflon leads with braid
Teflon Leads with Hose
Style STH

Stainless steel hose protects leads from abrasion on sharp equipment while allowing flexibility.
diagram of Thermal Corporation cartridge heater configuration style STH - teflon leads with hose
Right Angle Leads
Style NRL

Right angle leads offer high flexibility and are often used when space limitations are critical.
diagram of Thermal Corporation cartridge heater configuration style NRL - right angle leads
Right Angle Braid
Style NRB

Stainless steel braid protects leads from abrasion or sharp equipment while allowing flexibility. Available with or without an eyelet.
diagram of Thermal Corporation cartridge heater configuration style NRB - right angle braid
Right Angle Hose
Style NRH

Stainless steel hose protects leads from abrasion on sharp equipment while allowing flexibility.
diagram of Thermal Corporation cartridge heater configuration style NRH - right angle hose
Copper Elbow with Leads
Style CE

Copper elbow offers right angle exit of leads used when space limitations are not as critical.
diagram of Thermal Corporation cartridge heater configuration style CE - copper elbow leads
Copper Elbow with Braid
Style CS

Stainless steel braid protects leads from abrasion or sharp equipment while allowing flexibility.
diagram of Thermal Corporation cartridge heater configuration style CS - copper elbow braid
Copper Elbow with Hose
Style CH

Stainless steel hose protects leads from abrasion on sharp equipment while allowing flexibility.
diagram of Thermal Corporation cartridge heater configuration style CH - copper elbow hose
Mounting Flanges
Cartridge Heater Option - Style MF

Mounting flanges, made by your specifications, may be brazed to heater at your insertion length. Available with any configuration. Flange material is 1/16" thick.
diagram of Thermal Corporation cartridge heater option style MF - mounting flanges
Threaded Fittings
Cartridge Heater Option - Style TF

Threaded fittings provide fast, removable installation into a threaded hole. Silicone potting moisture seals can also be used in conjunction with the threaded fitting option. When ordering, specify brass fitting (Style TFB) or stainless steel fitting (Style TFS), unheated length, and if needed, water-tight.

Diameter

Pipe Thread

Brass Fittings

Stainless Steel Fittings

"A"

"B"

"A"

"B"

1/4"

1/8"

9/16"

13/16"

5/8"

7/8"

3/8"

1/4"

5/8"

7/8"

5/8"

7/8"

1/2"

3/8"

5/8"

7/8"

3/4"

1"

5/8"

1/2"

3/4"

1"


13/16"

1-1/16"

3/4"

3/4"

7/8"

1-1/8"

15/16"

1-3/16"

1"

1"

N/A

N/A

1-3/16"

1-7/16"

Please note that the fitting may be placed flush with the end of the heater or anywhere along the length of the cartridge heater. We also offer Double fitting. Please contact Thermal Corporation for more information.
diagram of Thermal Corporation cartridge heater option style TF - threaded fittings
Distributed Wattage
Cartridge Heater Option - Style DW

Distributed wattage concentrates extra heat where it is needed. Useful to compensate for high heat losses along the edges of heated parts. Can have as many zones as watt density allows. When ordering, specify number of zones, zone lengths, and wattage distribution.
diagram of Thermal Corporation cartridge heater option style DW - distributed wattage
Multi-Zone
Cartridge Heater Option - Style MZ

For controlled heat zones. May have up to three independent zones. Can be added to Style CL, Style SB, Style SH, and Style SL.
diagram of Thermal Corporation cartridge heater option style MZ - multi zone crimped leads
3-Phase
Cartridge Heater Option - Style 3PH

For high amp applications. Available on most configurations. Some restrictions apply. Contact Thermal Corporation for more information.
diagram of Thermal Corporation cartridge heater option style 3PH - 3 phase
Internal End Thermocouple
Cartridge Heater Option - Style JC or KC

Internal thermocouple junction is located at the end disc to monitor the material flow past the end of the heater. Comes grounded unless specified to be ungrounded. (JC specifies type "J" thermocouple. KC specifies type "K" thermocouple.)
diagram of Thermal Corporation cartridge heater option style JC or KC - internal end thermocouple
Internal Sheath Thermocouple
Cartridge Heater Option - Style JB or KB

Internal thermocouple junction is located adjacent to the inside heater sheath to monitor the part temperature. Comes grounded unless specified to be ungrounded. (JB specifies type "J" thermocouple. KB specifies type "K" thermocouple.)
diagram of Thermal Corporation cartridge heater option style JB or KB - internal sheath thermocouple
Double Fitting
Cartridge Heater Option

Used as a removal method. Offered in most diameters.
diagram of Thermal Corporation cartridge heater option double fitting
Strain Relief Spring
Cartridge Heater Option

Used in conjunction with braid. For applications with lead movement. Offered in most diameters.
diagram of Thermal Corporation cartridge heater option strain relief spring
Plugs
Cartridge Heater Option

Can be attached to most configurations. Please specify your plug when ordering.
diagram of Thermal Corporation cartridge heater option amphenol plugs
Ground Wire
Cartridge Heater Option

May be added to most configurations.
diagram of Thermal Corporation cartridge heater option ground wire
Threaded Knockout
Cartridge Heater Option

Used as a removal method. Can be added to all configurations.
diagram of Thermal Corporation cartridge heater option threaded knockout

*Discounts may apply. Call for Discounts Based on Order Quantity.

Looking for alternate covering over the leads?

We have two more options*! Please see below for details:

Silicone Boot

silicone boot covering for Thermal Corporation cartridge heater lead


The silicone boot is an extremely flexible silicone coated fiberglass braid. May be added over both leads or to each of the lead wires for protection against abrasive applications and/or handling. It is also resistant to moisture. Should not be used if leads are exposed to temperatures of 380°F or more!

Ex Flex

ex flex covering for Thermal Corporation cartridge heater lead


The ex flex is a fiberglass sleeving impregnated with dielectric film of resin. It is not as flexible as the silicone boot, and can only withstand temperatures of 300°F. It does, however, provide great dielectric strength to withstand severe applications and/or handling.

*Some customers prefer to use both. In which case we will attach the silicone boot and then the ex flex is attached over the boot.

Written by Jennifer Taylor & Shelby Reece
Date Published: 01.17.2014
Last Updated: 03.11.2020