MICRO SWITCH Magnetically Held Toggle Switches 005433 ET Series Issue 1 Datasheet FEATURES Most ET switches are designed and qualified to SAE AS55941 military standards to meet the required military or commercial aircraft requirements Uniquely designed with an integral solenoid which provides electrically maintained switch contacts (magnetic latching) for circuit requirements The solenoid can be over-ridden with manual movement of the toggle lever where immediate release is required Four different styles of lever actuators and three different types of electrical termination Temperature range of -65 C to 71 C -85 F to 160 F to accommodate applications in controlled and uncontrolled temperature environments DESCRIPTION Catalog listings available with up to four poles for control of MICRO SWITCH ET Series toggle switches are a specialty multiple circuits or providing redundant circuit capability type of toggle switch with an electrical latching mechanism. The latching mechanism (internal solenoid in the switch) is designed POTENTIAL APPLICATIONS to hold the momentary switch contacts closed once the toggle Flight decks for commercial and military aircraft switch has been manually actuated. An auxiliary set or remote Flight decks for commercial and military helicopters set of contacts opens the solenoid circuit of the switch and releases the toggle lever mechanism while opening the switch PORTFOLIO contacts which were held closed. In addition the the ET Series, Honeywell offers six series of To fulfill a variety of applications, the ET toggle switches are MICRO SWITCH toggle switches including the TL Series, NT available with up to four poles, with two or three toggle lever Series, TS Series, TW Series, and AT Series. positions, with or without lever locks. Most ET Series toggle switches mount in the popular size 15/32 inch diameter hole. ET toggle switches are designed to the military standards of SAE AS55941 with many of the switches being military qualified. VALUE TO CUSTOMERS Switch design allows a remote disconnect of the magnetically held switch contacts DIFFERENTIATION Sole manufacturing source for magnetically held toggle switches Sensing and Productivity SolutionsMICRO SWITCH Magnetically Held Toggle Switches, ET Series Table 1. Specifications Characteristic Parameter Description Military-grade toggle switch with magnetic hold capabilities Sealing Sealed to SAE AS55941 specifications Operating temperature -65 C to 71 C -85 F to 160 F Lever actuator styles (metal) Standard lever, tab lever, pull-to-unlock lever, push-to-unlock lever 2 or 3 positions maintained or mechanical momentary with electrically maintained (solenoid Lever/switch action energized) feature Mounting 15/32 in 0.47 in Circuitry 1PDT, 2PDT, 4PST, 4PDT Termination Leadwire, solder, screw Contact material Fine silver Electrical rating 28 Vdc Up to 7 A (refer to Table 2, Electrical Ratings) Approvals Most catalog listings qualified to SAE AS55941 90,6 mm H (with screw termination) x 25,4 mm 3.57 in H x 1.00 in Refer to individual Dimensions with standard lever drawings for above panel and below panel dimensions Table 2. Electrical Ratings (Amps) Sea Level 65,000 ft Supply Rating Code Voltage Resistive Inductive Motor Resistive Inductive Motor A 28 Vdc 4 2.5 4 4 2 4 B 28 Vdc 4 3 4 4 2.5 4 C 28 Vdc 7 2 5 1.5 1 1 D 28 Vdc 7 4 7 2.5 1 50,000 ft for Rating Code D. AP TYPICAL ET SWITCH CONSTRUCTION CIRCUITRY Single-Pole Double-Throw Double-Pole Double-Throw 2 2 1 1 3 3 4 5 NC 5 4 6 7 Four-Pole Single-Throw NC 8 1 2 3 4 5 6 7 8 9 NC 10 11 NC 12 2 sensing.honeywell.com