Cartridge Heaters

The Electric Heater Specialists
HEATERS FOR EVERY APPLICATION
PHONE: (978) 777-0070

Cartridge Heaters: Low to Medium Watt Density

Cartridge Heater: Low to Medium Watt Density

Applications:

Compressor Crankcase Heating, Copiers, Dies, Food Processing, Glue Pots, Heat Sealing, Hot Melt Adhesive,
Labeling, Medical Equipment, Packaging, Photographic Processing, Plastic Molding, Platens, Wax Pots.

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

Features

Hotwatt Precision Cartridge Heaters provide localized heat to restricted work areas requiring close thermal control.
Dies, Platens, and a variety of other types of processing equipment are efficiently heated. Closely controlled work
temperatures up to 1250°F are obtained by a combination of heater location and proper wattage output.
Basic designs are readily adaptable to a wide variety of special requirements, sizes, or ratings.
Maximum surface temperatures up to 1250°F.
Designations are etched on the sheath to preserve accurate shape.
Heating elements arranged just beneath outside surface for maximum heat transfer, minimum core temperature and faster heating.
Made in U.S.A.
Where specified, units can be supplied liquid tight.
Long, trouble free service.

Construction:

Heliarc welded end seal.
Mica.
Series 300 stainless steel sheath of precision dimensions and tolerances for intimate,
stable, non-oxidizing contact with cavities machined for them.
Element wire situated in close proximity to outside surface for maximum heat transfer
and minimum internal temperature while preserving good dielectric qualities.
Magnesium oxide packing.
Ceramic element support.
Ceramic cap.
Teflon insulated leads: 1/4" diameter.
Fiberglass leads: 5/16" - 3/4" diameter.
Post terminals: 15/16" - 2 3/8"

Round
Lengths between or longer than those listed may be ordered.
Red Catalog number denotes stock item. See Stock Section for specific ratings.

Diameter: 1/8" (.124/.120)					5/32" (.155/.152)				3/16" (.186/.183)
Maximum Amperage: 2 Not UL/CSA					2 Not UL/CSA				3.5
Sheath Length	Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts
1"	SC12-1	10	15		SC15-1	10	15		SC18-1	10	20
1 1/2"	SC12-1.5	10	25		SC15-1.5	10	25		SC18-1.5	10	32
2"	SC12-2	10	35		SC15-2	10	35		SC18-2	10	44
2 1/2"	SC12-2.5	10	45		SC15-2.5	10	45		SC18-2.5	10	55
3"	SC12-3	10	55		SC15-3	10	55		SC18-3	10	70
3 1/2"	SC12-3.5	10	65		SC15-3.5	10	65		SC18-3.5	10	80
4"	SC12-4	10	75		SC15-4	10	75		SC18-4	10	95
4 1/2"	SC12-4.5	10	85		SC15-4.5	10	85		SC18-4.5	10	107
5"	SC12-5	10	95		SC15-5	10	95		SC18-5	10	120
5/12"	SC12-5.5	10	105		SC15-5.5	10	105		SC18-5.5	10	132
6"	SC12-6	10	115		SC15-6	10	115		SC18-6	10	145
6 1/2"	SC12-6.5	10	125		SC15-6.5	10	125		SC18-6.5	10	157
7"	SC12-7	10	135		SC15-7	10	135		SC18-7	10	170
7 1/2"	SC12-7.5	10	145		SC15-7.5	10	145		SC18-7.5	10	182
8"	SC12-8	10	155		SC15-8	10	155		SC18-8	10	195
8 1/2"	SC12-8.5	10	165		SC15-8.5	10	165		SC18-8.5	10	207
9"	SC12-9	10	175		SC15-9	10	175		SC18-9	10	220
9 1/2"	SC12-9.5	10	185		SC15-9.5	10	185		SC18-9.5	10	232
10"	SC12-10	10	195		SC15-10	10	195		SC18-10	10	245
10 1/2"	SC12-10.5	10	205		SC15-10.5	10	205		SC18-10.5	10	257
11"	SC12-11	10	215		SC15-11	10	215		SC18-11	10	270
11 1/2"	SC12-11.5	10	225		SC15-11.5	10	225		SC18-11.5	10	282
12"	SC12-12	10	235		SC15-12	10	235		SC18-12	10	295
For longer lengths, compute wattage at: 10 watts per linear 1/2"				10 watts per linear 1/2"				12 watts per linear 1/2"

Wattage
Minimum Wattage
The following table should be used to determine the allowable voltage for low wattage miniature elements:

Size:	1/8" Diameter - 5/32" Diameter				3/16" Diameter
Length	30v	60v	120v	230v	30v	60v	120v	230v
1"	.6w	2.5w	10w	NA	.8w	3w	12w	NA
1 1/2"	.6w	2.5w	10w	NA	.5w	2w	8w	30w
2"	.5w	2w	8w	27w	.4w	1.5w	6w	22w

NA - Not Available

Red Catalog number denotes stock item. See Stock Section for specific ratings.

Diameter: 1/4" (.249/.245)					5/16" (.311/.307)				3/8" (.374/.370)
Maximum Amperage: 3.5					6				6
Sheath Length	Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts
1"	SC25-1	10	25		SC32-1	10	35		SC37-1	10	35
1 1/2"	SC25-1.5	10	50		SC32-1.5	10	70		SC37-1.5	10	70
2"	SC25-2	10	75		SC32-2	10	105		SC37-2	10	105
2 1/2"	SC25-2.5	10	100		SC32-2.5	10	140		SC37-2.5	10	140
3"	SC25-3	10	125		SC32-3	10	175		SC37-3	10	175
3 1/2"	SC25-3.5	10	150		SC32-3.5	10	210		SC37-3.5	10	210
4"	SC25-4	10	175		SC32-4	10	245		SC37-4	10	245
4 1/2"	SC25-4.5	10	200		SC32-4.5	10	285		SC37-4.5	10	285
5"	SC25-5	10	225		SC32-5	10	325		SC37-5	10	325
5 1/2"	SC25-5.5	10	250		SC32-5.5	10	360		SC37-5.5	10	360
6"	SC25-6	10	275		SC32-6	10	395		SC37-6	10	395
6 1/2"	SC25-6.5	10	300		SC32-6.5	10	430		SC37-6.5	10	430
7"	SC25-7	10	325		SC32-7	10	465		SC37-7	10	465
7 1/2"	SC25-7.5	10	350		SC32-7.5	10	500		SC37-7.5	10	500
8"	SC25-8	10	375		SC32-8	10	535		SC37-8	10	535
8 1/2"	SC25-8.5	10	400		SC32-8.5	10	570		SC37-8.5	10	570
9"	SC25-9	10	425		SC32-9	10	605		SC37-9	10	605
9 1/2"	SC25-9.5	10	450		SC32-9.5	10	640		SC37-9.5	10	640
10"	SC25-10	10	475		SC32-10	10	675		SC37-10	10	675
10 1/2"	SC25-10.5	10	500		SC32-10.5	10	710		SC37-10.5	10	710
11"	SC25-11	10	525		SC32-11	10	745		SC37-11	10	745
11 1/2"	SC25-11.5	10	550		SC32-11.5	10	780		SC37-11.5	10	780
12"	SC25-12	10	575		SC32-12	10	815		SC37-12	10	815
For longer lengths, compute wattage at: 25 watts per linear 1/2"				35 watts per linear 1/2"				35 watts per linear 1/2"

Red Catalog number denotes stock item. See Stock Section for specific ratings.

Diameter: 1/2" (.499/.494)					5/8" (.624/.619)				3/4" (.749/.741)
Maximum Amperage: 10					10				15
Sheath Length	Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts
1"	SC50-1	10	55		SC62-1	10	60		SC37-1	1400	35
1/2"	SC50-1.5	10	100		SC62-1.5	10	120		SC75-1.5	40	140
2"	SC50-2	10	145		SC62-2	10	180		SC75-2	40	210
2 1/2"	SC50-2.5	10	190		SC62-2.5	10	240		SC75-2.5	40	280
3"	SC50-3	10	235		SC62-3	10	300		SC75-3	40	350
3 1/2"	SC50-3.5	10	280		SC62-3.5	10	360		SC75-3.5	40	420
4"	SC50-4	10	325		SC62-4	10	420		SC75-4	40	490
4 1/2"	SC50-4.5	10	370		SC62-4.5	10	480		SC75-4.5	40	560
5"	SC50-5	10	415		SC62-5	10	540		SC75-5	40	630
5 1/2"	SC50-5.5	10	460		SC62-5.5	10	600		SC75-5.5	40	700
6"	SC50-6	10	505		SC62-6	10	660		SC75-6	40	770
6 1/2"	SC50-6.5	10	550		SC62-6.5	10	720		SC75-6.5	40	840
7"	SC50-7	10	595		SC62-7	10	780		SC75-7	40	910
7 1/2"	SC50-7.5	10	640		SC62-7.5	10	840		SC75-7.5	40	980
8"	SC50-8	10	685		SC62-8	10	900		SC75-8	40	1050
8 1/2"	SC50-8.5	10	730		SC62-8.5	10	960		SC75-8.5	40	1120
9"	SC50-9	10	775		SC62-9	10	1020		SC75-9	40	1190
9 1/2"	SC50-9.5	10	820		SC62-9.5	10	1080		SC75-9.5	40	1260
10"	SC50-10	10	865		SC62-10	10	1140		SC75-10	40	1330
10 1/2"	SC50-10.5	10	910		SC62-10.5	10	1200		SC75-10.5	40	1400
11"	SC50-11	10	955		SC62-11	10	1260		SC75-11	40	1470
11 1/2"	SC50-11.5	10	1000		SC62-11.5	10	1320		SC75-11.5	40	1540
12"	SC50-12	10	1045		SC62-12	10	1380		SC75-12	40	1610
For longer lengths,compute wattage at: 45 watts per linear 1/2"				60 watts per linear 1/2"				70 watts per linear 1/2"

Diameter: 15/16" (.936/.928)					1" (.999/.991)				1 1/4" (1.249/1.241)
Maximum Amperage: 25					25				30
Sheath Length	Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts
2"	SC93-2	50	280		SC1.0-2	50	280		SC1.2-2	100	350
2 1/2"	SC93-2.5	50	375		SC1.0-2.5	50	375		SC1.2-2.5	100	470
3"	SC93-3	50	470		SC1.0-3	50	470		SC1.2-3	100	590
3 1/2"	SC93-3.5	50	565		SC1.0-3.5	50	565		SC1.2-3.5	100	710
4"	SC93-4	50	660		SC1.0-4	50	660		SC1.2-4	100	830
4 1/2"	SC93-4.5	50	755		SC1.0-4.5	50	755		SC1.2-4.5	100	950
5"	SC93-5	50	850		SC1.0-5	50	850		SC1.2-5	100	1070
5 1/2"	SC93-5.5	50	945		SC1.0-5.5	50	945		SC1.2-5.5	100	1190
6"	SC93-6	50	1040		SC1.0-6	50	1040		SC1.2-6	100	1310
6 1/2"	SC93-6.5	50	1135		SC1.0-6.5	50	1135		SC1.2-6.5	100	1430
7"	SC93-7	50	1230		SC1.0-7	50	1230		SC1.2-7	100	1550
7 1/2"	SC93-7.5	50	1325		SC1.0-7.5	50	1325		SC1.2-7.5	100	1670
8"	SC93-8	50	1420		SC1.0-8	50	1420		SC1.2-8	100	1790
8 1/2"	SC93-8.5	50	1515		SC1.0-8.5	50	1515		SC1.2-8.5	100	1910
9"	SC93-9	50	1610		SC1.0-9	50	1610		SC1.2-9	100	2030
9 1/2"	SC93-9.5	50	1705		SC1.0-9.5	50	1705		SC1.2-9.5	100	2150
10"	SC93-10	50	1800		SC1.0-10	50	1800		SC1.2-10	100	2270
10 1/2"	SC93-10.5	50	1895		SC1.0-1.5	50	1895		SC1.2-10.5	100	2390
11"	SC93-11	50	1990		SC1.0-11	50	1990		SC1.2-11	100	2510
11 1/2"	SC93-11.5	50	2085		SC1.0-11.5	50	2085		SC1.2-11.5	100	2630
12"	SC93-12	50	2180		SC1.0-12	50	2180		SC1.2-12	100	2750
For longer lengths,compute wattage at: 95 watts per linear 1/2"				95 watts per linear 1/2"				120 watts per linear 1/2"

Diameter: 1.90" (1.890/1.910)					2 3/8"" (2.365/2.385)
Maximum Amperage: 40					40
Sheath Length	Cat.No.	Min. Watts	Max. Watts		Cat.No.	Min. Watts	Max. Watts
6"	SC1.9-6	500	1400		SC1.0-2	50	280
7"	SC1.9-7	500	1700		1	1	1
8"	SC1.9-8	500	1960		SC2.3-8	500	2300
9"	SC1.9-9	500	2240		SC2.3-9	500	2650
10"	SC1.9-10	500	2500		SC2.3-10	500	3000
12"	SC1.9-12	500	3100		SC2.3-12	500	3630
14"	SC1.9-14	500	3650		SC2.3-14	500	4300
16"	SC1.9-16	500	4200		SC2.3-16	500	5000
18"	SC1.9-18	500	4750		SC2.3-18	500	5600
20"	SC1.9-20	500	5300		SC2.3-20	500	6270
22"	SC1.9-22	500	5900		SC2.3-22	500	6930
24"	SC1.9-24	500	6450		SC2.3-24	500	7600
26"	SC1.9-26	500	7000		SC2.3-26	500	8250
28"	SC1.9-28	500	7550		SC2.3-28	500	8900
30"	SC1.9-30	500	8100		SC2.3-30	500	9570
32"	SC1.9-32	500	8700		SC2.3-32	500	10250
34"	SC1.9-34	500	9250		SC2.3-34	500	10900
36"	SC1.9-36	500	9800		SC2.3-36	500	11550
38"	SC1.9-38	500	10350		SC2.3-38	500	12200
40"	SC1.9-40	500	10900		SC2.3-40	500	12870
42"	SC1.9-42	500	11500		SC2.3-42	500	13530
44"	SC1.9-44	500	12000		SC2.3-44	500	14200
46"	SC1.9-46	500	12600		SC2.3-46	500	14850
48"	SC1.9-48	500	13200		SC2.3-48	500	15500
For longer lengths, compute wattage at: 280 watts per linear 1"				330 watts per linear 1"

* Lengths longer than those listed may be ordered.

Wattage
The maximum wattage's listed are computed at 60 watts per square inch of heated surface. With proper fit in a heat sink,
long life may be expected at this watt density. Consult factory for higher watt density applications. Lower watt density
will result in longer life. Any wattage within standard limits may be ordered without affecting price.

Voltage
Standard voltages are either 120V or 240V (subject to limits above). Lower voltages are available.

Termination
All units up to 15/16" diameter, within published amperage limits, are manufactured with 6" (type SF1) leads, longer length
leads are available. Standard insulation on 1/4" units is Teflon (200°C); Fiberglass (250°C) is standard on units 5/16" diameter
and larger. All units 15/16" and larger are manufactured with post terminals (type SF-3). Optional Type SF1 leads are available.
Stock units supplied with 12" leads.

Tolerances
Wattage tolerances are held to +5%, -10% at rated voltage. Diameter is always .001" less, but not more than .009" less, than the
nominal (fractional) heater diameter except for 1.90" and 2 3/8" diameters. This sizing is maintained so that all units are a slide fit
into a standard reamed hole of the size ordered. Thermal action will expand the unit to a snug fit for best heat conduction. If close
hole tolerances are not maintained, operating life may be drastically reduced. See specific heater size for exact tolerances. Length
tolerances are ± 2% with a 1/16" minimum. Consult factory for closer tolerances.

How To Order
After determining the wattage required and the line voltage available, determine the physical space available for heaters and the
number of heaters required.
Review Stock list for In-Stock Items.
Review Special Features.

Specify: catalog number, wattage, voltage, lead type, and special features, if required.
Example: SC62-8.5/600W/240V/SF1-16/SF14-10

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