Incremental
Type
Absolute
Type
218
Detector
Push
Slide
Rotary
Encoders
Power
Dual-in-line
Package Type
TACT SwitchTM
Custom-
Products
20mm Size Metal Shaft Type
EC20A/RK203 Series
Encoder
Operating life
Operating temperature range
Heavy torque and comfortable operation feel with compliance to encoder and
potentiometer applications.
1. For with switch type, only the incremental type is available.
2. All the potentiometer types can be customized. Contact us with the detailed specifications.
3. Please place purchase orders per minimum order unit N (integer).
Notes
1mA 5V DC 0.05W
30,000cycles
−30℃to ＋85℃−40℃to ＋85℃
Rating
Items Specifications
Encoder Potentiometer
Typical Specifications
Product Line
VerticalFlat
Encoders
30
40±20
1.5
1818
EC20A1824401
EC20A1820401
400
Product No.
1
2
Drawing
No.
Minimum
order unit
（pcs.）
Number
of detent
Number
of pulse
Operating
section
Length of
operating section
（mm）
Travel of
push-on switch
（mm）
Operating
direction
Detent
torque
（mN・m）
VerticalFlat
Potentiometer
30
Shall be in accordance with individual specifications
240°max RK203110400
Product No.
3
Drawing
No.
Minimum order unit
（pcs.）
Number
of detent Rotational
angle
Operating
section
Length of
operating section
（mm）
Operating
direction
Detent
torque
（mN・m）
Tray
Packing Specifications
800400
Number of packages（pcs.）
525×375×258
Export package
measurements
（mm）
1 case /Japan 1 case /export packing
Automotive
Use
Refer to P.220 for product specifications.
Incremental
Type
Absolute
Type
219
Detector
Push
Slide
Rotary
Encoders
Power
Dual-in-line
Package Type
TACT SwitchTM
Custom-
Products
Dimensions
PhotoNo. Style
1.5
10
30
12
4.5
¿6
2.5
3.5
3.5 8
C1
M9
×
0.75
3-1
(17.8)
15.5
19.2
8.3
¿3
1.5 9
1
NC
NC NC
NC
NC
3
2
¿20.2
Mounting
surface
PC board mounting hole dimensions
（Viewd from mounting face）
Unit:mm
EC20A
without switch type
Incremental Type
RK203
without switch type
Potentiometer Type
2
3
1.5
10
30
12
2.5
3.5
3.5
8
M9
G
0.75
4.5
¿6
C1
3-1
(17.8)
¿20.2
15.5
19.2
8.3
¿3
1.5 9
NCNCNC
B
AC
Mounting
surface
20mm Size Metal Shaft Type EC20A/RK203 Series
Encoder
EC20A
with push-on switch
（travel 1.5mm）
Incremental Type
1
!
"
G
#$
%&
'''
$
#
Incremental
Type
Absolute
Type
220
Detector
Push
Slide
Rotary
Encoders
Power
Dual-in-line
Package Type
TACT SwitchTM
Custom-
Products
Test circuit 5VDC
R
TerminalA
R
TerminalB
R
TerminalC
Test condition Rotation speed
TerminalD
ABC switch
360°/s
Product Specifications
B
CCW CW
C
0˚
A
EC11B
EC09E/EC11E/EC11J/EC11K
EC111/EC11E
0B
Output Wave Circle Diagram
V1＝V2＝1.5V max.
EC20A
5V DC
RR
Terminal B
Terminal A
Terminal C
Encoder
Test circuit
tt
V1
V2
5V
ON ONOFF
Output waveform
Sliding direction
t : Masking time to avoid chattering
Measurementcondition：Rotationspeed360˚/s
At R = 5kΩ
Chattering
:
8ms max.
Bounce
:
5ms max.
At R = 5kΩ
Chattering
:
5ms max.
Bounce
:
5ms max.
EC11EH
A signal
B signal
Detent stabillity point
OFF ON
ONOFF
The stable detent position cannot be identified in phase B.
EC11E 18 detents 9 pulse
EC11E 36 detents 18 pulse
EC09E,EC11J, EC11K
CW direction
Attached Parts
Hexagonal nut
11
M7
×
0.75
2
0.5
¿12
¿7.1
EC11B Series Unit:mm
Flat washer
A signal
B signal
Detent stabillity point
OFF ON
ONOFF
EC11B, EC11E
30 detents, 15 pulse
CW direction
（
）
（
）
（
）
（
）
EC20A
A signal
Detentposition
CWdirection
B signal
C signal
OFF
ON
OFF
ON
OFF
ON
EC11EH
11mm and 20mm Size Metal Shaft Encoders
Automotive
Use
5V DC
RR
Terminal B
Terminal A
Terminal C
Encoder
Test circuit
tt
V1
V2
5V
ON ONOFF
Output waveform
Sliding direction
t : Masking time to avoid chattering
Measurementcondition：Rotationspeed360˚/s
At R ＝5kΩ
Chattering
:
2ms max.
Bounce
:
2ms max.
At R ＝5kΩ
Chattering: 5ms max.
Bounce: 2ms max.
At R ＝5kΩ
Chattering
:
3ms max.
Bounce
:
2ms max.
V1＝V2＝1.5V max.
EC11BEC09E
EC11E/EC11J/EC11K
Sliding Noise
Incremental
Type
Absolute
Type
205
Detector
Push
Slide
Rotary
Encoders
Power
Dual-in-line
Package Type
TACT SwitchTM
Custom-
Products
Encoders
List of Varieties
Soldering
Dimensions
（mm）
Outline
specifications
Shaft types
Operating direction
Number of pulse/
Number of detent
Push switch
（Travel mm）
Optional
functions
W
D
H
Manual soldering
Photo
Output
Changeover angle
Dip soldering
Reflow soldering
Page
Operating temperature range
Maximum operating current（Resistive load）
Electrical
performance
Mechanical
performance
Environmental
performance
Output signal
Output wave
Sliding noise
Push-pull strength
Cold
Damp heat
Dry heat
Insulation resistance
Voltage proof
Rotational torque
Detent torque
Items
Contact arrangement
Travel（mm）
Operating force（N）
Rating
Contact resistance
Operating life
12.5
11.7
15/30
EC12D
With push-on switch
With（0.5）
–40℃to ＋85℃
100MΩmin. 250V DC
300V AC for 1minute
or 360V AC for 1s
5±3mN・m
10±5mN・m
100N
6
＋2.5
−2
Incremental
11.7
12
4.5
20.2 12.4
14.2 19.2 13.2
10 5
Vertical
9/18
15/30 18/18 12/12
24/24
24/
Without
209 215 218 221
11mm size 20mm size 12mm size
EC11K EC11J EC20A/RK203 EC12E
Standard detent
Without detent
Metal shaft Insulated shaft
Without
With（0.5, 1.5）Without
With（1.5）Without
Single-shaft
260±5℃, 3±1s
Please see P.217
260±5℃, 5±1s 260±5℃, 3±1s
Type
Series
350℃max. 3s max.
–40℃to ＋85℃
EC20A: –40℃to ＋85℃
RK203: –40℃to ＋85℃
–10℃to ＋70℃
10mA
Output of A and B signals, proportionate to phase difference
Please see P.220 Please see P.223
Please see P.220 Please see P.223
100MΩmin. 250V DC 10MΩmin. 50V DC
50V AC for 1minute
12±5mN・m
40±20mN・m
3±2mN・m
3 to 20mN・m
–40±3℃for 240h –40±3℃for 10h
85±3℃for 240h 85±3℃for 10h
60±2℃, 90 to 95% RH for 240h 60±2℃, 90 to 95% RH for 10h
300V AC for 1minute
10mN・m max.
25±15mN・m
40±15mN・m
100N 80N
Push-on Switch Specifications
EC11K/EC11J EC20A EC12D
Single pole and single throw（Push-on）
0.5±0.3 1.5±0.5 0.5±0.3
5±2 4±23
＋1.5
−1
0.1A 5V DC
0.5A 16V DC
（1mA 16V DC min.
ratings）
1mA 5V DC
100mΩfor initial period; 200mΩafter operating life
1,000,000 times min. 100,000 times min. 20,000times min. 30,000times min.
