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
10
6
5
10
6
max. switching power
MDP
2
10
5
2
10
5
Contact resistance, initial
10 m
15 m
Insulation resistance
10
11
10
11
Contact bounce
100 s
100 s
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
25C to + 70C
1
)
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-14
MD and MDP Key Switches
Dimensional Drawings
Ordering code
1
2
3
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
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)
PDF 
ZIP