EDSAC0 [ITT]
ED Domes and EDM Domes; ED圆顶和穹顶EDM
| 型号： | EDSAC0 |
| 厂家： | 
ITT Cannon |
| 描述： | ED Domes and EDM Domes |
| 文件： | 总2页 (文件大小：40K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ED Domes and EDM Domes
ED
Construction
ED
EDM
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.
Function
Momentary
1 make contact = SPST
12.7 (0.500 )
Momentary
Contact arrangement
Distance between button
Terminals
1 make contact=SPST,NO
12.7 (0.500 ) centers, min.
PC pins or tabs
PC pins or tabs
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.
Electrical data
Silver
Gold
Switching power max. AC/DC
Switching voltage max. AC/DC
Switching current max. AC/DC
Carrying current max. AC/DC
Dielectric strength (50 Hz/1 Min.) ꢀ 300 V
Operating life with max. switching ꢀ 106 operations ꢀ 5 ꢁ 106 operations
power
Contact resistance
Insulation resistance (100 V)
Contact bounce
6 W
3 W
100 V
50 mA
250 mA
ꢀ 300 V
3 W
100 V DC
50 mA
100 V
100 mA
250 mA
ꢀ 300 V
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.
ꢂ 10 mΩ
ꢀ 1011
ꢂ 15 mΩ
ꢀ 1011
ꢂ 100 µs
ꢂ 15 mΩ
ꢀ 1011
ꢂ 1ms
Ω
Ω
Ω
ꢂ 100 µs
Mechanical data
ED
EDM
Switching travel
0.3 (0.012 )
Max. admissible 0.5
(0.02)
2.4N ± 25%
(240 grams ± 25%)
0.4 (0.0157 )
Max. admissible 0.5
(0.0197)
4.5N (450 grams) ±25%
6.5N (650 grams) ±25%
EDM
Operating force
The EDM is available in 4 versions:
EDM 450 AU
EDM 650 AU
EDM 450 AG
EDM 650 AG
Further data
Contact material
Silver plated, Gold plated
Ag (silver plated)
Au (gold plated)
The EDM Multi Dome Series was
developed for low profile applications
needing increased tactile response
and high performance specifications.
Operating temperature
Storage temperature
– 25°C to + 70°C
– 40°C to + 85°C
-55°C to +85°C
-55°C to + 85°C
Thermoplastic
Material
housing
contact base
Phosphor bronze
plating of contact area
1.5 microns gold (G)
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
Climatic data
Climatic category (days)
10 for silver version
56 for gold version
Soldering by static bath
255°C for 5 seconds
(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
Ordering code: see next page.
Dimensions are shown in mm (inch)
Dimensions subject to change
www.ittcannon.com
A-36
ED Domes and EDM Domes
Dimensional Drawings
ED Domes
1.2
(0.0472)
12
(0.472)
11.36
(0.447)
12.7
(0.5)
10.35
(0.407)
0.8
(0.0315)
5.7 (0.224)
11.3
(0.445)
Upper diaphragm
Switch action principal
The disc contact is essentially made
of two separate conductive domes
diaphragms separated by an insulated
material.
Pressure
The upper diaphragm is shaped so that
under pressure it collapses suddenly
and establishes contact with the lower
diaphragm.
Insulating
washer
Lower diaphragm
Circular contact area
SWITCH IN RESTING POSITION
SWITCH IN ACTIVE POSITION
Ordering code
1
2
S
3
4
0
Example: ED
SC
1
2
Designation: ED / EDM450 / EDM650
Contact material: S = silver,
G = gold
3
4
Contacts: AC = with PC pins,
SC = with tabs
Sealing: 0 = flux sealed,
1 = totally sealed
Dimensions are shown in mm (inch)
Dimensions subject to change
www.ittcannon.com
A-37
相关型号：
©2020 ICPDF网 联系我们和版权申明