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	Standard Specifications and Tolerances of Finned Strip Heaters. If tighter tolerances are required, consult Tempco.

Performance Ratings

Maximum Sheath Temperature: 1200°F (650°C)
Maximum Watt Density:
Still Air	Max. W/in2	Max. W/cm2
Up to 300°F (149°C)	20	3.1
300° to 600°F (149 to 316°C)	16	2.5
600° to 800°F (316 to 427°C)	10	1.6
Moving Air	Max. W/in2	Max. W/cm2
At 600 ft./min., up to 200°F (3 M/sec., up to 93°C)	40	6.2
At 600 ft./min., up to 400°F (3 M/sec., up to 204°C)	30	4.7
At 600 ft./min., up to 600°F (3 M/sec., up to 316°C)	20	3.1

Electrical Ratings

Maximum Voltage: 480VAC (when applicable)
Maximum Amperage: 22 amps
Resistance Tolerance: +10%, -5%
Wattage Tolerance: +5%, -10%

Material Specifications & Physical Sizes

Sheath: 304 Stainless Steel
Fins: Nickel Plated Steel Fins (SS Optional)
Screw Terminals: Stainless Steel 10-32 UNF Threads
Width Including Fins: 2"
Height Including Fins: 1-3/8"
Length Tolerance: Up to 24" ±1/16", over 24" ±1/8"
Mounting Slot Size: Standard 5/16" x 1/2"
Oversize For Secondary Insulating Bushing:
1/2" x 5/8" for 480 Volts and above

Tempco's Finned Strip Heaters are recognized under the UL component recognition program. Consult Tempco for limitations.
UL file number E65652.

Secondary Insulating Bushings
Secondary insulating ceramic bushings increase the effective space between the heater and grounded surface for electrical clearance at high voltages. They must be used on the mounting tabs when the finned heater is connected in series or in direct line voltage above 300 volts.
When Insulating Bushings are required, a 1/2" x 5/8" slot is substituted for the standard slot size (5/16" x 1/2").

Insulating Bushing Assembly

Part Number	Price US Dollars
CERR-1001	11.85

Note: Two Assemblies are required for each heater.

When using secondary insulating bushings, the heater must be guarded
to avoid any accidental contact. The guard must be electrically isolated
from the heater and must be properly grounded.