Hollow Shaft Type Devices
21mm Size Encoder Type
EC21A
Series
Hollow-center shaft encoder with 4mm height contribute to space saving and multifunctioning.
Typical Specifications
Items
Rating
Without load
Operating life
With load
50,000cycles
Specifications
10mA 5V DC
50,000cycles
Hollow Shaft
Type Devices
Product Line
Actuator
length
（mm）
Detent torque
（mN
m）
・
7±5
30
9
16±7
18
9
EC21A0920401
2
15
Vertical
Without
600
EC21A1520401
Number of
detent
Number of
pulse
Operating
direction
Push-on
switch
Minimum order
unit pcs.）
（
Product No.
EC21A1540401
No.
1
Dimensions
No.
Photo
Mounting surface
3.5
4
9
3
2
Unit:mm
Style
0.7
2-
21
.6
22.3
PC board mounting hole dimensions
（Do
not wire the shaded area）
Encoder
Type
Potentiometer
Type
0
°
12
4-4
C
23
16
.6
.2
120
°
¿15.4
21.6
2.5
C
90°
2.6
23.6
90°
3-2
A
B
12
0
°
12
0
°
3-2
1
4-
2.
¿10.8
5
1.5
6
2.
A
5
B
3–ø1 holes
¿12.2
1
2-8
0.7
3.5
4
Mounting surface
9
3
2
0
12
°
21
C
.6
22.3
16
1.5
C
90°
2.6
23
16
.6
.2
°
120
4-4
3-2
3-2
2
90°
1.8
2
¿15.4
21.6
2.5
12
A
B
6
2.
B
4-
¿10.8
2.
5
A
2
5
23.6
0
°
12
¿12.2
0
°
1
2-8
ø1
3–ø1 holes
.5
ho
le
455
ALPS [ ALPS ELECTRIC CO.,LTD. ]
