Backer Hotwatt Strip Heaters Mica Insulated

Strip Heaters Mica Insulated Main

Eagle Sensors & Controls is an authorized Backer Hotwatt distributor. Contact us with sales and application support.

Strip-and-Finned-strip

Description

U.L. Recognized – E56973
C.S.A. Certified – 016386-0-000

Applications

Dies, cylinders, kettles, molds, process machines, platens, tanks, or other applications where controlled heating is needed.

Features
  • Strip heaters may be used single or in groups to provide the required amount of heat.
  • For maximum distribution, it is recommended that the strip heaters be clamped securely to area to be heated to prevent distortion or unequal expansion.
  • Made in U.S.A.
Construction
  1. Post Terminals.
  2. Mica Insulator.
  3. Resistance Ribbon Wire.
  4. Mica Element Support.
  5. Rust Resistant Steel Sheath.
Width 1″ 1 1/2″ 2″
Overall
Length		 Catalog
Number		 Min.
Watts		 Max.
Watts		 Catalog
Number		 Min.
Watts		 Max.
Watts		 Catalog
Number		 Min.
Watts		 Max.
Watts
4″ ST1-4 50 100 ST1.5-4 50 155 ST2-4 50 195
6″ ST1-6 50 155 ST1.5-6 50 250 ST2-6 50 315
8″ ST1-8 50 230 ST1.5-8 50 340 ST2-8 50 435
12″ ST1-12 50 345 ST1.5-12 50 520 ST2-12 50 675
18″ ST1-18 50 520 ST1.5-18 50 790 ST2-18 50 1035
24″ ST1-24 50 700 ST1.5-24 50 1060 ST2-24 50 1395
Width 2 1/2″ 3″ 4″
Overall
Length		 Catalog
Number		 Min.
Watts		 Max.
Watts		 Catalog
Number		 Min.
Watts		 Max.
Watts		 Catalog
Number		 Min.
Watts		 Max.
Watts
4″ ST2.5-4 50 215 ST3-4 50 230 ST4-4 50 300
6″ ST2.5-6 50 350 ST3-6 50 400 ST4-6 50 540
8″ ST2.5-8 50 515 ST3-8 50 590 ST4-8 50 780
12″ ST2.5-12 50 775 ST3-12 50 940 ST4-12 50 1250
18″ ST2.5-18 50 1250 ST3-18 50 1480 ST4-18 50 2000
24″ ST2.5-24 50 1700 ST3-24 50 2000 ST4-24 50 2700
  • Standard Termination is Type SSA. For units under 1 1/2″ wide, standard termination is Type FO.
Wattage

The above chart is based on a watt density of 30 watts per square inch of surface.

The watt density should be varied, depending on operating temperature in accordance with the following table.

Operating Temperature Watts/square inch
300°F 40
400°F 30
500°F 21
600°F 12
700°F – 900°F (Max.) 10

To compute wattage, multiply length (less 1″) x width x watts per square inch based on above table. On units with mounting holes, reduce length by an additional 2″ when computing wattage.

Voltage

Standard voltages are either 120V or 240V. Other voltages are available.

Tolerances

Width: ±.03″

Thickness: .187″ nominal

Length:
Up to 24″, ±1/16″

24″ to 48″, ±1/8″
Lengths over 48″, consult factory.

Terminal Height: 3/4″ nominal

Wattage tolerances are held to ±5%, -10% at rated voltage.

Mounting Holes

Units are supplied without mounting holes. 1/2″ x 5/16″ mounting holes, one each end, may be supplied if specified. Hole center is 1/2″ from end. Terminals are 1 1/4″ from end on types SSA, SSB, and SO on units with mounting holes. Other mounting hole sizes and locations are available. Consult factory.

How To Order

Specify: Quantity, width, length, wattage, voltage, terminal arrangement, mounting holes and cutouts if any. Detail cutouts, and mounting holes (if any) on dimensional drawing.

Example: ST1.5-10/300W/120V/SSA/ standard mounting holes

Optional Termination

Stainless Steel Post
Up to 2 1/4″ wide: 6-32 x 1″ maximum 5/8″ on center
2 1/4″ wide and wider: 8-32 x 1″ maximum, 3/4″ on center

Type SSA: Parallel one end
Available on: 1 1/2″ and wider

Stainless Steel Post SSA

Type SC: Centered post terminals
Available on: 1 1/2″ and wider

Stainless Steel Post SC

Type SSB: Tandem one end.
Available on: 1 1/2″ and wider

Stainless Steel SSB

Type SO: Opposite ends
Available on: 1″ and wider

Stainless Steel Post SO

High Temperature Insulated Leads

Type FS: Insulated leads at one end
Available on: 1 1/2″ and wider

Stainless Steel FS

Type FO: Insulated leads at opposite ends
Available on: 1″ and wider

Mica Insulated Strip Heater Construction