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| MD and MDP Key Switches The disc contact type ED is a momentary key switch with short travel and good tactile feedback. The ED is the main component of the MD and MDP switches. MDP-Disc push-button key switch Small momentary key switch equipped with button, can be mounted on printed circuit board. MD-Disc push-button key switch Small momentary key switch including a protective rubber actuator. A wide range of keyboards can be built by using the MD. MD and MDP key pads are available in two contact materials: gold plated bronze silver plated bronze Construction Function Contact arrangement Distance between button centers, min. Terminals Electrical data Switching power max. Switching voltage max. Switching current max. Dielectric strength (50 Hz/1 Min.) Operating life with MD max. switching power MDP Contact resistance, initial Insulation resistance Contact bounce Mechanical data Switching travel Operating force Momentary 1 make contact = SPST 12.7 (0.500) PC pins Silver 6 W AC/DC 100 V AC/DC 100 mA AC/DC 300 V 106 2 105 10 m 1011 100 s MD 0.6 (0.0236) 2.6N 25% (260 grams 25%) Gold 3 W AC/DC 100 V AC/DC 50 mA AC/DC 300 V 5 106 2 105 15 m 1011 100 s MDP 0.3 (0.0118) 2.4N 25% (240 grams 25%) Further data Contact material Operating temperature Storage temperature Climatic category (days) Soldering by static bath Silver, Gold - 25C to + 70C1) - 40C to + 85C 10 for silver version 56 for gold version 255C for 5 seconds 1) Special design for ambient temperature - 40C to + 85C (Type MD40) available (not washable in solvents) Note: MD40 disc keyswitch conforms to climatic category 40/85/56. Dimensions are shown in mm (inch) Dimensions subject to change www.ittcannon.com B-13 MD and MDP Key Switches Dimensional Drawings MD (0.4) (0.138) (0.2) (0.2) (0.0315) (0.2) (0.1) (0.5) (0.4) (0.1) (0.2) Holes for additional fixing (0.5) (0.157) (0.197) MDP (0.315) (0.0591) (0.238) (0.2) (0.4) (0.2) (0.315) (0.2) (0.1) (0.5) (0.1) (0.2) Holes for additional fixing (0.5) (0.157) (0.138) Button MDP (0.472) (0.0138) (0.11) (0.0748) (0.394) (0.0591) (0.394) (0.472) (0.0984) (0.0591) (0.472) Ordering code Example: 1 2 3 Designation: MD, MDP, MD40 Contact material: AG = silver, AU = gold MDP button color: 01 = black, 02 = white, 03 = red, 04 = light grey, 05 = dark grey, 07 = blue 1 MD 2 AG 3 04 Dimensions are shown in mm (inch) Dimensions subject to change www.ittcannon.com B-14 |
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