Watlow Heater Catalog

Strip/Clamp-On Heaters

375 High-Temperature Strip Heaters

Heater Part Numbers (Continued)

Chromalox ® Part No. ①

Wellman ® Part No. ①

Watt

Approx. Net Wt.

Width

Length

Power

Density

Part

Rust Resist. Chrome Stl. Aluminized Chrome Stl.

in. (mm) in. (mm) Term. Volts (Watts) W/in 2 (W/cm 2 ) lbs (kg)

Number

Iron Sheath

Sheath

Steel Sheath

Sheath

1 1 / 2 (38) 17 7 / 8 (454) Offset 120

SGA1J17RO4 SGA1J17RO5 SGA1J17RO6 SGA1J17RO7 SGA1J17R01 SGA1J17RO2 SGA1J17RO9 SGA1J17RO8 SGA1J17RO10 SGA1J17RO3 SGA1J17RT1 SGA1J17RT2 SGA1J17RT3 SGA1J17RT4 SGA1J17RT5 SGA1J19JO6 SGA1J19JO7 SGA1J19JO4 SGA1J19JO8 SGA1J19JO1 SGA1J19JT1 SGA1J21AO1 SGA1J21AO2 SGA1J21AO3 SGA1J21AO4 SGA1J21AT1 SGA1J23NO5 SGA1J23NO6 SGA1J23NO1 SGA1J23NO2 SGA1J23NO7 SGA1J23NO3 SGA1J23NO4 SGA1J23NT1 SGA1J23NT3 SGA1J23NT5 SGA1J23NT6 SGA1J23NT7 SGA1J23NT8 SGA1J25JO1 SGA1J25JO2 SGA1J25JO3 SGA1J25JO4 SGA1J25JO5

350 350 375 375 500 500 750 750

17 17 18 18 24 24 36 36 48 48 24 24 35 47 47 15 22 22 32 43 32 20 20 29 29 19 17 17 25 25 34 34 51 17 25 33 33 50 16 16 23 23 31 8

(2.6) (2.6) (2.8) (2.8) (3.7) (3.7) (5.6) (5.6) (7.4) (7.4) (3.7) (3.7) (5.4) (7.3) (7.3) (2.3) (3.4) (3.4) (5.0) (6.7) (5.0) (3.1) (3.1) (4.5) (4.5) (2.9) (2.6) (2.6) (3.9) (3.9) (5.3) (5.3) (7.9) (1.2) (2.6) (3.9) (5.1) (5.1) (7.8) (2.5) (2.5) (3.6) (3.6) (4.8)

1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.2 (0.54) 1.3 (0.59) 1.3 (0.59) 1.3 (0.59) 1.3 (0.59) 1.3 (0.59) 1.3 (0.59) 1.4 (0.64) 1.4 (0.64) 1.4 (0.64) 1.4 (0.64) 1.4 (0.64) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.5 (0.68) 1.7 (0.77) 1.7 (0.77) 1.7 (0.77) 1.7 (0.77) 1.7 (0.77)

OT-1835 OT-1835 OT-1837 OT-1837 OT-1850 OT-1850

— —

SS1221 SS1232 SS2241 SS1252 SS1261 SS1272

SS2221 SS2232

17 7 / 8 (454) Offset 240 17 7 / 8 (454) Offset 120 17 7 / 8 (454) Offset 240 17 7 / 8 (454) Offset 120 17 7 / 8 (454) Offset 240 17 7 / 8 (454) Offset 120 17 7 / 8 (454) Offset 240

—SS1261

— —

— — —

SS2241 SS2252

— — — —

OT-1807 OT-1807 OT-1801 OT-1801

— SS2261 — SS2272 — SS2281 — SS2292

17 7 / 8 (454) Offset 120 1000 17 7 / 8 (454) Offset 240 1000

17 7 / 8 (454) 1-on-1 120 17 7 / 8 (454) 1-on-1 240 17 7 / 8 (454) 1-on-1 240

500 500 750

S-1850 S-1850

S-1805 S-1805 S-1807 S-1801 S-1801

SD1211 SD1222

SD2171 SD2182

— — —

— SD2202 — SD2211 — SD2222

17 7 / 8 (454) 1-on-1 120 1000 17 7 / 8 (454) 1-on-1 240 1000

19 1 / 2 (496) Offset 240 19 1 / 2 (496) Offset 120 19 1 / 2 (496) Offset 240 19 1 / 2 (496) Offset 240 19 1 / 2 (496) 1-on-1 240 2 (533) Offset 120 2 (533) Offset 240 2 (533) Offset 120 2 (533) Offset 240 2 (533) 1-on-1 120 23 3 / 4 (603) Offset 120 23 3 / 4 (603) Offset 240 23 3 / 4 (603) Offset 120 23 3 / 4 (603) Offset 240 21 1 ⁄ 21 1 ⁄ 21 1 ⁄ 21 1 ⁄ 21 1 ⁄

350 500 500 750 750 500 500 750 750 500 500 500 750 750

OT-1935 OT-1950 OT-1950

—

SS1301

—

OT-1905 OT-1905 OT-1907 OT-1901

— SS2301 — SS2312

— — —

— —

19 1 / 2 (496) Offset 240 1000

— SS2332 — SD2262

S-1907

OT-2150 OT-2150

— —

SS1341 SS1352

— —

— —

OT-2107 OT-2107

— SS2341 — SS2352

S-2050

S-2005

SD1291 SS1361 SS1372 SS1391 SS1402

SD2291 SS2361 SS2372 SS2381 SS2392

OT-2450 OT-2450 OT-2475 OT-2475

OT-2405 OT-2405 OT-2407 OT-2407 OT-2401 OT-2401 OT-2415

23 3 / 4 (603) Offset 120 1000 23 3 / 4 (603) Offset 240 1000 23 3 / 4 (603) Offset 240 1500

— — —

— SS2401 — SS2412

— —

23 3 / 4 (603) 1-on-1 240 23 3 / 4 (603) 1-on-1 240 23 3 / 4 (603) 1-on-1 240

250 500 750

S-2425 S-2450

—

SD1322 SD1342

—

S-2404 S-2407 S-2401 S-2401 S-2415

SD2322

— — — —

— SD2352 — SD2361 — SD2372

23 3 / 4 (603) 1-on-1 120 1000 23 3 / 4 (603) 1-on-1 240 1000 23 3 / 4 (603) 1-on-1 240 1500

— —

25 1 / 2 (648) Offset 120 25 1 / 2 (648) Offset 240 25 1 / 2 (648) Offset 120 25 1 / 2 (648) Offset 240

500 500 750 750

OT-2550 OT-2550 OT-2575 OT-2575

— —

SS1421 SS1432 SS1441 SS1452

— —

OT2507 OT-2507 OT-2501

SS2421 SS2432

25 1 / 2 (648) Offset 240 1000

—

— SS2452

CONTINUED

① Chromalox ® and Wellman ® part numbers are used as a cross reference to help select the equivalent Watlow part number. Chromalox ® sizes 27 in. (686 mm) and longer, and all Wellman ® sizes have mounting slot center to center distances 1 / 8 in. (3.2 mm) less than Watlow spacing. Note: 5 / 16 in. x 1 / 2 in. (7.9 mm x 13 mm) mounting holes are supplied on all 375 strip heaters as standard, larger mounting holes may be provided 17 / 32 in. x 11 / 16 in. (13.5 mm x 17.5 mm). Note that the Watlow part number specifies that the 375 strip heater includes an aluminized steel sheath. If a special sheath material is required, such as stainless steel, please contact your Watlow representative for material availability.

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