Dimensions are shown in mm (inch)
Dimensions subject to change
www.ittcannon.com
B-13
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 Momentary
Contact arrangement 1 make contact = SPST
Distance between button centers, min.
12.7 (0.500)
Terminals PC pins
Electrical data Silver Gold
Switching power max. 6 W AC/DC 3 W AC/DC
Switching voltage max. 100 V AC/DC 100 V AC/DC
Switching current max. 100 mA AC/DC 50 mA AC/DC
Dielectric strength (50 Hz/1 Min.) 300 V 300 V
Operating life with MD 1065 106
max. switching power MDP 2 1052 105
Contact resistance, initial 10 mΩ15 mΩ
Insulation resistance 1011 Ω1011 Ω
Contact bounce 100 µs 100 µs
Mechanical data MD MDP
Switching travel 0.6 (0.0236) 0.3 (0.0118)
Operating force 2.6N ± 25% 2.4N ± 25%
(260 grams ± 25%) (240 grams ± 25%)
Further data
Contact material Silver, Gold
Operating temperature – 25°C to + 70°C1)
Storage temperature – 40°C to + 85°C
Climatic category (days) 10 for silver version
56 for gold version
Soldering by static bath 255°C for 5 seconds
1) Special design for ambient temperature – 40°C to + 85°C (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-14
MD and MDP Key Switches
Dimensional Drawings
Ordering code 123
Example:
MD AG 04
1Designation: MD, MDP, MD40
2Contact material: AG = silver,
AU = gold
3MDP button color: 01 = black,
02 = white,
03 = red,
04 = light grey,
05 = dark grey,
07 = blue
MD
MDP
Button MDP
(0.5) (0.4)
(0.5)
(0.0315)
(0.157) (0.197)
(0.138)
(0.2)
(0.1)
(0.4)
(0.2) (0.2)
(0.1)
(0.2)
Holes for additional fixing
(0.315) (0.0591)
(0.5)
(0.5)
(0.315)
(0.238)
(0.157) (0.138)
(0.2)
(0.1)
(0.4)
(0.2) (0.2)
(0.1)
(0.2)
Holes for additional fixing
(0.472)
(0.11)
(0.0748)
(0.0138)
(0.0984)
(0.472)
(0.472)
(0.394)
(0.0591)
(0.394)
(0.0591)
