The ETL® was designed to substantially improve life safety and minimize property damage by providing an instantaneous fusible link response and separation in the event of fire (or at the advent of products of combustion such as smoke) and has the additional capability to respond to any type of detector or circuit capable of supplying a short duration current impulse. The design allows for substitution or retrofit of ordinary fusible links or other actuators and release devices installed in: dampers, doors, roof hatches, towers, extinguishing systems, and inert chemical or gas release systems.

The inherent major advantage of the ETL® over other products is dually redundant dormancy. The ETL® is an Underwriters Laboratories® listed space age device manufactured to exacting aerospace quality standards.

The ETL® is a Underwriters Laboratories listed fusible link/release device with:

165° F [74° C] nominal temperature rating Product Characteristic Installation PDF

69° C [156° F] nominal temperature rating Product Characteristic Installation PDF

165° F [74° C] ETL® has a 40 pound [18.14 kg] maximum continuous, 2 pound [0.90 kg] minimum continuous tensile weight rating at standard temperature. Whereas the 69° C [156° F] ETL has a 40 pound [18.14 kg] maximum continuous, 5 pound [2.268 kg] minimum continuous tensile weight rating at standard temperature.

Additionally, it contains a bridgewire initiated pyrotechnic heating element with a minimum all fire current requirement of 200 milliamperes [0.2 amp] for 50 milliseconds minimum duration within a voltage range of 6-30 VAC-DC [NEC Class 2, low voltage], and safe no-fire input test current of 10 milliamperes maximum.

The fusible link portion is a nominal 1" [25.4 mm] X 3 1/8" [79.4 mm] X 1/2" [12.7mm] envelope with 1/2" [2.7 mm] square reinforced openings at the ends to allow attachment of "S" hooks, straps, or other attachments.

An 11/16" [17.3 mm] diameter 1-1/4" [3.17 mm] protruding cylinder houses the pyrotechnic heating element and attachment wires [UL® 1018 Wire Class 1] and provides a means to attach a standard EMT [conduit] connector adapter to any combination 1/2" [12.7 mm] EMT or 3/8" [9.5 mm] or 1/2" [12.7mm] flexible conduit, thereby meeting any requirements such as National Electric Code specifications for "Wiring in Ducts, Plenums, and Other Air Handling Spaces."