MD and MDP Key Switches The disc contact type ED is a momentary Construction key switch with short travel and good Function Momentary tactile feedback. Contact arrangement 1 make contact = SPST The ED is the main component of the Distance between button centers, min. 12.7 (0.500) MD and MDP switches. Terminals PC pins MDP-Disc push-button key switch Electrical data Silver Gold Small momentary key switch equipped Switching power max. 6 W AC/DC 3 W AC/DC with button, can be mounted on printed Switching voltage max. 100 V AC/DC 100 V AC/DC circuit board. Switching current max. 100 mA AC/DC 50 mA AC/DC MD-Disc push-button key switch Dielectric strength (50 Hz/1 Min.) 300 V 300 V 6 6 Small momentary key switch including Operating life with MD 10 5 10 5 5 max. switching power a protective rubber actuator. MDP 2 10 2 10 Contact resistance, initial 10 m 15 m A wide range of keyboards can be built 11 11 Insulation resistance 10 10 by using the MD. Contact bounce 100 s 100 s MD and MDP key pads are available in two contact materials: Mechanical data MD MDP gold plated bronze Switching travel 0.6 (0.0236) 0.3 (0.0118) silver plated bronze Operating force 2.6N 25% 2.4N 25% (260 grams 25%) (240 grams 25%) Further data Contact material Silver, Gold 1 Operating temperature 25C to + 70C ) Storage temperature 40C to + 85C Climatic category (days) 10 for silver version 56 for gold version Soldering by static bath 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-13MD 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 xing (0.5) (0.197) (0.157) MDP (0.315) (0.4) (0.0591) (0.238) (0.2) (0.2) (0.315) (0.2) (0.1) (0.5) (0.1) (0.2) Holes for additional xing (0.5) (0.157) (0.138) Button MDP (0.11) (0.394) (0.0748) (0.0591) (0.472) (0.0138) (0.394) (0.472) (0.0591) (0.0984) (0.472) Ordering code 123 Example: MD AG 04 1 Designation: MD, MDP, MD40 2 Contact material: AG = silver, AU = gold 3 MDP button color: 01 = black, 02 = white, 03 = red, 04 = light grey, 05 = dark grey, 07 = blue Dimensions are shown in mm (inch) Dimensions subject to change www.ittcannon.com B-14