EC21A
21mm Size Ring Type
EC21C
Ring encoder with 4mm height contribute to
space saving and multifunctioning
■
Typical Specifications
Items
Specifications
10mA 5V DC
50,000 cycles
−40℃ to ＋85℃
NEW
Rating
Operating life
Operating temperature range
1
°
90°
2.6
6
2.
A
1.5
5
B
3–ø1 holes
Do not wire the shaded area
296
Refer to P.307 for soldering conditions.
23.6
Encoders
Metal
Shaft
Insulated
Shaft
Hollow
Shaft
Ring
Type
Product Line
Structure
Actuator
length
（mm）
Detent torque
（mN m）
・
7±5
Dip
9
16±7
15
Reflow
12
17±8（Initial）12
＋ 7
（After reflow）
,
−4
Number of
detent
30
18
30
Number of
pulse
15
9
15
Minimum order unit（pcs.）
Japan
600
240
600
640
Export
1,200
480
1,200
640
Product No.
No.
1
2
3
4
EC21A1540401
EC21A1520401
EC21A0920401
EC21A1520407
EC21C1520401
Packing Specifications
Tray
Product No.
Number of packages（pcs.）
1 case /Japan
240
600
600
640
1 case /export packing
480
1,200
1,200
640
Export package measurements
（mm）
375×285×223
364×508×
192
360×540×290
310×400×
185
EC21A09
EC21A15
EC21A1520407
EC21C
Dimensions
No.
Photo
Style
Unit:mm
PC board mounting hole dimensions
(Viewed from mounting side)
23
°
22.3
16
.2
.6
C
90°
°
°
EC21A/EC21C／21mm Size Ring Type
Dimensions
No.
Photo
Style
Unit:mm
PC board mounting hole dimensions
(Viewed from mounting side)
Encoders
3.5
4
Mounting surface
9
3
2
12
0
°
23
21
0.7
22.3
.6
16
1.5
16
C
.2
.6
C
90°
2.6
2
90°
1.8
A
B
5
3–ø1 holes
23.6
21.6
3-2
120
4-4
°
3-2
ø15.4
2.5
2
Metal
Shaft
A
B
12
0
2.
°
6
ø12.2
0
°
12
4-
2.
5
ø10.8
2
ø1
.5
ho
le
1
2-8
Do not wire the shaded area
Insulated
Shaft
Mounting
Mounting surface
surface
3-C0.3
4-3.05
3-C0.3
4-3.05
3-1.5
0
12
30°
30°
2.
2
2-2.65
6
.
2-2.65
3.5
14.5
4
3-1.5
3-8
4
3
°
12
6
3.5
15
14.5
3-8
3
15
1
16.3
6.3
0°
12
120
0°
C
°
22.3
22.3
Hollow
Shaft
2-
23
2-
16
.2
23
2-
.2
C
16
2
.
-
6
3-φ1.45
15.4
3-2.1
3-2.1
21.6
3-φ1.45
2-2.5
3-2.05
12
2-2.5
3-2.05
2-8
2
Mounting surface
4
12
7
3
3-2.1
φ15.4
16
21
.6
.3
22.3
8.1
3-1
1
Do not wire the shaded area
5
5
.55
2-8
8.1
3-1
5
12
12
0°
12
0°
A
B
2-1.55
5
1.0
e
3- hol
.55
0°
A
B
1
5
1.0
- ole
3 h
5
2-1.6
0.8
12
4-4.1
0
°
C
5
2.
6
22
4
2-φ1.475
2-φ0.95
0.8
2-2.65
90°
30°
3-3
23.6
2-2
C0.2
A
B
1
12
φ10
0
°
4-
3-2.05
2-1.55
φ12
.2
2.
6
Output Wave
Sliding Noise
V
1
=V
2
=
2.5V max.
R
Test circuit
R
5V
Terminal A
Terminal B
5V DC
Output waveform
t
t
V
1
V
2
Encoder
Terminal C
ON
OFF
ON
A signal
B signal
OFF
ON
ON
OFF
Sliding direction
CW direction
Detent stability position
Measurement condition：Rotation speed 360˚/s
t : Masking time to avoid chattering
※Detent position cannot be specified for B signal.
At R = 5kΩ
Chattering : 5ms max. Bounce : 5ms max.
8.1
3-1
5
2-8
5
1.0 s
-
φ
hole
3
5
.55
23.6
2-1.55
0°
23.6
3
15.4
21.6
12.2
12.2
90°
.6
90°
3-3
Ring
Type
3-3
2-
2.
6
.6
-2
.8
2
10
10.
8
3-0
.62
5
.8
120
°
23
2-
.2
.6
16
2-
0
°
12
297
Type
Series
Ring type
21mm size
28mm size
35mm size
EC21A
NEW
EC21C
EC28A
EC35A
EC35AH
EC35B
Photo
Encoders
Output
Shaft types
Number of pulse /
Number of detent
W
Dimensions
（mm）
D
H
Operating temperature range
Operating life
Automotive use
Life cycle (availability)
Rating
Max./min. operating
Electrical current（Resistive load）
performance
Insulation resistance
Voltage proof
Detent torque
Mechanical
performance
Push-pull
strength
Push
Pull
300V AC for 1minute
or 360V AC for 2s
7±5mN½m
16±7mN½m
●
9/18
15/30
21.6
Incremental
（Two phase A and B ）
Ring type
15/30
22
21.6
4
−40℃ to ＋85℃
50,000 cycles
●
●
●
15/30
18/18
28
29
15/30
Incremental
Incremental
（Two phase A and B ）
/
（ Three phase A, B and C）
Self-return switch
6×ABC/18
10×ABC/30
35
4.5
15/30
Metal
Shaft
35
37
12.1
Insulated
Shaft
30,000 cycles
●
●
Hollow
Shaft
10mA 5V DC
10mA / 1mA
Ring
Type
100MΩ min. 250V DC
300V AC for 1minute
or 360V AC for 1s
17±8mN½m
（Initial）
12
＋ 7
mN½m
−4
（After reflow）
300V AC for 1minute or 360V AC for 2s
7±5mN½m
12±7mN½m
20±
10mN½m
100N
100N
Ring type
Insertion
—
—
—
—
—
—
—
—
—
296
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
298
—
—
—
—
—
—
—
—
—
299
—
—
—
—
—
—
—
—
—
300
12±5mN½m
18±7mN½m
30±
15mN½m
300V AC for 1minute
or 360V AC for 1s
20±
10mN½m
18±7mN½m
Shaft configuration
Terminal type
Switch type
Contact
arrangement
Travel（mm）
Operating force（N）
Switch
Specifications Switch ON position
Rotational torque
Rating
Contact resistance
Operating life
Page
Self-return
switch
Single pole and
double throw
2.8±0.5
3.8±
1.5
15°
±5°
40±25mN m
・
10mA 5V DC
200mΩ max.
15,000 cycles
302
Encoders Soldering Conditions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 307
Encoders Cautions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 308
Note
●
Indicates applicability to all products in the series.
265
Encoders Soldering Conditions
Reference for Manual Soldering
Series
Tip temperature
Soldering time
No. of solders
EC05E, EC09E, EC10E, EC111, EC11B,
EC11E, EC11G, EC11K, EC12D, EC12E,
EC18A, EC21A, EC28A, EC35A, EC35AH,
EC35B, EC40A, EC45A, EC50A, EC60B,
EM11B, EM20B, EC21C
EC11J
350℃ max.
3s max.
1 time
Encoders
350±
10℃
3
＋1
s
0
2 time
Reference for Dip Soldering
Metal
Shaft
Series
Preheating
Soldering surfacetemperature
100℃ max.
Dip soldering
Soldering temperature
260±5℃
Heating time
2 min. max.
Soldering time
5±
1s
No. of solders
EC09E, EC11B, EC111, EC11E, EC11G,
EC11K, EC18A, EC21A, EC28A, EC35A,
EC35AH, EC35B, EC50A, EC60B
EC10E, EC12D, EC12E, EM11B
EC40A
EC45A
EM20B
2 time max.
Insulated
Shaft
100℃ max.
1
10℃ max.
100℃ max.
80℃ max.
1 min. max.
1 min. max.
2 min. max.
1 min. max.
260±5℃
260℃ max.
260℃ max.
260℃ max.
3±
1s
10s max.
5s max.
3s max.
2 time max.
1 time
2 time max.
2 time max.
Hollow
Shaft
Example of Reflow Soldering Condition
Temperature profile
300
Temperature (˚C )
Ring
Type
A
B
200
C
D
100
Time (s)
Pre-heating
E max.
Room
temperature
F max.
G max.
H max.
Series
A
260℃
250℃ min.
230℃ to 245℃
B
230℃
230℃ min.
220℃
C
180℃
180℃
200℃
D
150℃
150℃
150℃
E
2 min. max.
60s to 120s
60s to 120s
F
3s
ー
ー
G
40s
30s to 40s
25s to 60s
H
4 min. max.
ー
300 max.
No. of reflows
2 time max.
2 time max.
1 time max.
EC11J
EC05E
EC21C
注記
1. When using an infrared reflow oven, solder may sometimes not be applied. Be sure to use a hot air reflow oven or a
type that uses infrared rays in combination with hot air.
2. The temperatures given above are the maximum temperatures at the terminals of the encoder when
employing a hot air reflow method. The temperature of the PC board and the surface temperature of the
encoder may vary greatly depending on the PC board material, its size and thickness. Ensure that the surface
temperature of the encoder does not rise to 250℃ or greater.
3. Conditions vary to some extent depending on the type of reflow bath used. Be sure to give due consideration to this
prior to use.
307
Analog electronics
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