Dimensions are shown in mm (inch)

Dimensions subject to change

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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

5

max. switching power

MDP

2

2

Contact resistance, initial

10 m

Ω

15 m

Ω

Insulation resistance

Ω

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

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

Note: MD40 disc keyswitch conforms to climatic category 40/85/56.