參數(shù)資料
型號(hào)： E78-21A
廠商： THE CHERRY CORP
元件分類： 開關(guān)
英文描述： SNAP ACTING/LIMIT SWITCH, DPST, LATCHED, 11.43mm, PANEL MOUNT
文件頁(yè)數(shù)： 3/3頁(yè)
文件大?。?/td> 131K
代理商： E78-21A
53
Specifications subject to change without notice.
0.315
dia.
A
Pulled out
- 00A
- 20A
- 30A
- 40A
- 50A
Auxiliary Buttons — Double Pole
–50A has button with special shaft to accept
auxiliary push buttons for manual actua-
tion. Consult factory for auxiliary buttons.
Button Detail — Double Pole
”A” dimension (full overtravel position)
Ordering Information
Select the current rating you need.
Combine the corresponding Series/Prefix
number with the appropriate suffix number
for the switch type, circuitry and terminals
you require. Example: DPDT: E78–30A,
DPST NO: E78–31A, DPST NC: E78–32A.
0.045 (1.14)
0.100 (2.54)
0.97
(24.64)
Operating
Position
Rest
Position
0.080 (2.03)
0.375
(9.53)
Reference Line
Thick Mounting Panel
(see panel cutout detail)
0.550
(13.97)
Cut out 1.445” (36.70) for
0.045 (1.14) thick panel
Cut out 1.455 (36.96) for
0.100 (2.54) thick panel
1.57 (39.88)
0.79 (20.07)
0.68
(17.27)
0.510 (12.95)
0.540 (13.72)
0.34
(8.64)
dia.
0.060
(1.52)
R
COM
NO
NC
1.24
(31.5)
Panel Cutout Detail
NC
NO
COM
0.050 (1.27)
R max.
Dimensions — Double Pole inches (mm)
Circuitry — Double Pole
Double throw or single throw
versions available.
Double Pole Series:
E77/F77, E78/F78, E79/F79, E75
Terminals — Double Pole
This switch series has 0.187
″ x 0.020″
(4.75mm x 0.51mm) as standard for up
to 10 amps and 0.250
″ x 0.032″ (6.35mm
x 0.81mm) for 16 amps.
Consult factory for non-standard
terminal options.
International Versions —
Double Pole
For VDE applications, standard terminals
are 0.187
″ x 0.032″ (4.75mm x 0.81mm).
Switch prefix must be “F” for VDE
approved switches. Example: F78–30A
was E68–30A.
Actuator Specifications — Double Pole
Max. Full
Rest
Maximum
Operating
Minimum
Max. Movement Maximum
Over-Travel
Position
Pre-Travel
Point*
Overtravel
Differential
Operating
Position
Actuator Switch
inches
Force**
inches
Type
(mm)
(g)
(mm)
Basic Momentary Action
–00A
0.845–0.905
0.125
0.720–0.820
0.375
0.075
680
0.400
(21.46–22.99)
(3.18)
(18.29–20.83) (9.53)
(1.91)
(10.16)
Push-Pull (Reset)
–20A
0.920–0.980
0.150
0.800–0.900
0.300
0.075
510
0.500
(23.37–24.89)
(3.81)
(20.32–22.86) (7.62)
(1.91)
(12.70)
Momentary
–30A
0.730–0.790
0.125
0.610–0.710
0.100
0.075
757
0.520
(18.54–20.07)
(3.18)
(15.49–18.03) (2.54)
(1.91)
(13.21)
“Cheat Interlock” (Pull out to lock)
0.730–0.790
0.155
0.800–0.900
0.030
0.090
567
0.980
(18.54–20.07)
(3.94)
(20.32–22.86) (0.76)
(2.29)
(24.89)
Short Button Momentary
–40A
0.420–0.480
0.125
0.300–0.400
0.175
0.075
680
0.125
(10.67–12.19)
(3.18)
(7.62–10.16)
(4.45)
(1.91)
(3.18)
For Auxiliary Push Button
–50A
0.420–0.480
0.125
0.300–0.400
0.175
0.075
680
0.125
(10.67–12.19)
(3.18)
(7.62–10.16)
(4.45)
(1.91)
(3.18)
*Measured above reference line. Refer to dimensional drawing above.
**Operating Forces listed above are for E78/E79 switches only. E75 Operating Force: 921 grams max. for momentary switches.
Dual function switch: Push in to operate in normal momentary mode and pull out for maintained action.
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