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Standard end seals are limited to a temperature of approximately 350°C (662°F). Operating lamps at temperatures above this level leads to oxidation, overheating and eventual burnout. Cooling for lamp end seals is provided on some heaters to increase the times and temperatures at which they can be operated and to extend lamp life.
End seals are available in metallic and ceramic versions. The metallic end seals have un-insulated leads while the ceramic end seals have insulated leads. The ceramic end seal serves to protect the joint of each lamp lead to the lamp emitter filament and the insulated leads are electrically isolated.
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Round Ceramic Base
R7s No lead wire
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Round Ceramic base with bare lead wire
R7s
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Round Ceramic base with covered lead wire
R7s w/Ring "U" Terminal
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Lead wire; No Sleeve
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Nickel End w/ lead wire
Y Clip
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Flat Ceramic Base w/ Insulated Lead Wire
SK15 Cap
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Nickel Strip
X Cap
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Base Type Diagram
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