ED Domes and EDM Domes
Dimensions are shown in mm (inch)
Dimensions subject to change
www.ittcannon.com
A-36
ED
ED, the disc contact is a momentary
tact switch with short travel and good
tactile feedback. Direct mounting on a
printed circuit board is possible.
In that case, the dome must be
actuated by a soft actuator of 3.0 mm
(0.118) minimum diameter. The
ED dome is available in various types
of modules and is the main component
of several switches presented in this
catalog.
Self-cleaning system:
The contact is made on at least 3 points
of the lower diaphragm, these 3 points
of contacts are always different at each
new switch action. During the switching
movement, the upper disc slides on the
lower diaphragm, ensuring the contact’s
self-cleaning.
EDM
The EDM is available in 4 versions:
EDM 450 AU
EDM 650 AU
EDM 450 AG
EDM 650 AG
The EDM Multi Dome Series was
developed for low profile applications
needing increased tactile response
and high performance specifications.
Applications range from aircraft instru-
ment panels to radio keypads. This high
performance dome switch combines our
reliable ED contact system with added
tactile domes for forces of 4.5N
(450 grams) and 6.5N (650 grams).
Main features
Gold (Au) or silver (Ag) contacts
Two different operating forces
Low profile
Compact PWB spacing
Proven application in avionics
Construction ED EDM
Function Momentary Momentary
Contact arrangement 1 make contact = SPST 1 make contact=SPST,NO
Distance between button
12.7 (0.500 ) 12.7 (0.500 ) centers, min.
Terminals PC pins or tabs
PC pins or tabs
Electrical data Silver Gold
Switching power max. AC/DC 6 W 3 W 3 W
Switching voltage max. AC/DC 100 V 100 V 100 V DC
Switching current max. AC/DC 100 mA 50 mA 50 mA
Carrying current max. AC/DC 250 mA 250 mA
Dielectric strength (50 Hz/1 Min.) 300 V 300 V 300 V
Operating life with max. switching 10
6
operations 5 10
6
operations
power
Contact resistance 10 mΩ 15 mΩ 15 mΩ
Insulation resistance (100 V) 10
11
Ω 10
11
Ω 10
11
Ω
Contact bounce 100 µs 100 µs 1ms
Mechanical data ED EDM
Switching travel 0.3 (0.012 ) 0.4 (0.0157 )
Max. admissible 0.5 Max. admissible 0.5
(0.02) (0.0197)
Operating force 2.4N ± 25% 4.5N (450 grams) ±25%
(240 grams ± 25%) 6.5N (650 grams) ±25%
Further data
Contact material Silver plated, Gold plated Ag (silver plated)
Au (gold plated)
Operating temperature – 25°C to + 70°C -55°C to +85°C
Storage temperature – 40°C to + 85°C -55°C to + 85°C
Material housing Thermoplastic
contact base Phosphor bronze
plating of contact area 1.5 microns gold (G)
Climatic data
Climatic category (days) 10 for silver version
56 for gold version
Soldering by static bath 255°C for 5 seconds
Ordering code: see next page.
