EDSSC0 Datasheet, PDF (1/2 Pages) ITT Industries – ED Domes and EDM Domes

ED Domes and EDM Domes
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
ț Gold (Au) or silver (Ag) contacts
ț Two different operating forces
ț Low profile
ț Compact PWB spacing
ț Proven application in avionics
Construction
Function
Contact arrangement
Distance between button
Terminals
ED
Momentary
1 make contact = SPST
12.7 (0.500 )
PC pins or tabs
EDM
Momentary
1 make contact=SPST,NO
12.7 (0.500 ) centers, min.
PC pins or tabs
Electrical data
Silver
Gold
Switching power max. AC/DC
6W
3W
3W
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.) м 300 V
м 300 V
м 300 V
Operating life with max. switching м 10⁶ operations м 5 Ï« 10⁶ operations
power
Contact resistance
Ϲ 10 mΩ
Ϲ 15 mΩ
Ϲ 15 mΩ
Insulation resistance (100 V)
м 10¹¹ Ω
м 10¹¹ Ω
м 10¹¹ Ω
Contact bounce
Ϲ 100 µs
Ϲ 100 µs
Ϲ 1ms
Mechanical data
Switching travel
Operating force
ED
0.3 (0.012 )
Max. admissible 0.5
(0.02)
2.4N ± 25%
(240 grams ± 25%)
EDM
0.4 (0.0157 )
Max. admissible 0.5
(0.0197)
4.5N (450 grams) ±25%
6.5N (650 grams) ±25%
Further data
Contact material
Silver plated, Gold plated
Operating temperature
– 25°C to + 70°C
Storage temperature
– 40°C to + 85°C
Material
housing
contact base
plating of contact area
Ag (silver plated)
Au (gold plated)
-55°C to +85°C
-55°C to + 85°C
Thermoplastic
Phosphor bronze
1.5 microns gold (G)
Climatic data
Climatic category (days)
Soldering by static bath
10 for silver version
56 for gold version
255°C for 5 seconds
Ordering code: see next page.
A-36
Dimensions are shown in mm (inch)
Dimensions subject to change
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