EC35A 35mm Size Ring Type
A low-profile unit with 4.5mm height and
good operation feel
■ Typical Specifications
Items
Specifications
Rating
Operating life
Encoders
10mA 5V DC
50,000 cycles
Operating temperature range
−40℃ to ＋85℃
Product Line
Detent torque
（mN・m）
20
18±7
Number of pulse
30
15
Minimum order unit（pcs.）
30±15
Product No.
Drawing
No.
840
EC35A1520402
１
700
EC35A1550502
2
Japan
Export
420
350
Insulated
Shaft
25
Number of
detent
Metal
Shaft
Actuator length
（mm）
Packing Specifications
Tray
Number of packages（pcs.）
1 case /Japan
1 case /export packing
20
420
840
25
350
700
Export package measurements
（mm）
Hollow
Shaft
Actuator length
（mm）
360×540×380
Unit:mm
PC board mounting hole dimensions
(Viewed from mounting side)
3-16.5
17.5
2-3
3
3-ø1
hole
18.5
5
0
4-R
29.4
ON
OFF
B signal
18.5
90°
φ1
.5
ON
3-φ
1
ho
le
lestability position
Detent
2-1.5
ACB
CW direction
5
ho
17.5
7
le
ho
le
V1=V2=2.5V max.
Test circuit
R
Output waveform
5V DC
t
R
Terminal A
Terminal B
t
V1
5V
3
2-5.1
OFF
.75
ho
5
Sliding Noise
1.5
.4 .6 .4
36 28 -4
2- 2- 4
A signal
ACB
3-φ
1
.7
φ2
3
36
5
φ3
Output Wave
Y
φ25.25
3-3.5
90°
φ1
.5
2-1.5
2-1.5
φ2
3.
18.5
29.4
2-5.1
A CB
2-1.5
35
X
5
0.7
4-R
29.4
18.7ø2
Y
4.4
90°
18.5
18.7
17.5
3.7
3-3
2-3.5
φ28.8
X
1.5
2.6
5
ø25
2-1.5
3-3.5
ø3
4-
36
2-ø
2
X
Y
35
ø28.8
3-3
2-3.5
3-5
Y
.4 .6 .4
36 -28 -4
4
2
X
35
3-16.5
.4
.6
2-
25
4.5
2-12
18.7
36
28
36.5
2-3.5
φ28.8
3-3
2-3
2-3
2-3.5
29.4
2-5.1
22-
3-3.5
90°
X
φ25.25
3-8
5
2-1.5
2-1.5
0.75
35
4.4
36 A C B
3-ø1
5 29.4
hole
3-ø1
hole
14.5
4-
90°
A CB
2-1.5
2-1.5
Y
90°
18.5
35
5
Y
3-5
4.4
V2
Encoder
Terminal C
Measurement condition：Rotation speed 360˚/s
ON
OFF
ON
Sliding direction
t : Masking time to avoid chattering
At R = 5kΩ Chattering : 5ms max. Bounce : 5ms max.
Refer to P.315 for soldering conditions.
307
φ
Y
29.4
17.5
18.7
36.5
2-12
3.7
18.7
ø3
5
.6
2.6
3.7
ø3
X
.4
28
2-ø
X
2-12
36
2-
2.6
ø2
4
825
.6
2-ø
X
Y
90° 2-2
2-3.5
4-R
2-11.5
90°
4.5
ø25
2-1.5
3-3.5
14.5
36.5
2-
6.
4-
ø2
17.5
3-3
3-3
2-3.5
2-3.5
ø28.8
X
14.5
35
36
29.4
22-1.5
3
0.75
35
3-8
36
29.4
2-1.5
4-R
Y
ø25
2-1.5
4.5
3-3.5
Y
0.75
20
2-3.5
36.5
2-12
2-11.5
3-8
1
36.5
2-12
4-R
4.5
2-11.5
2-5.1
20
4.5
ø28.8
20
2-3.5
2-5.1
Style
35
No.
2-3.5
Ring
Type
Dimensions
Encoders
List of Varieties
Ring type
Type
21mm size
EC21A
Series
28mm size
EC21C
EC28A
35mm size
EC28C
EC35A
EC35AH
NEW
Photo
Encoders
Incremental
（Two phase A and B ）
Output
Shaft types
Ring type
Number of pulse /
Number of detent
9/18
15/30
Metal
Shaft
W
Dimensions
（mm）
Incremental
（ Three phase A, B and C）
D
21.6
15/30
15/30
18/18
22
28
28
21.6
29
29.5
H
6×ABC/18
10×ABC/30
15/30
35
4
Insulated
Shaft
Operating temperature range
4.5
−40℃ to ＋85℃
−40℃ to ＋90℃
Operating life
−40℃ to ＋85℃
50,000 cycles
Automotive use
●
●
●
●
●
●
Hollow
Shaft
Life cycle (availability)
Rating
10mA 5V DC
Ring
Type
Max./min. operating
Electrical current（Resistive load）
performance
Insulation resistance
Mechanical
performance
10mA / 1mA
100MΩ min. 250V DC
Voltage proof
300V AC for 1minute
or 360V AC for 2s
300V AC for 1minute
or 360V AC for 1s
300V AC for 1minute
or 360V AC for 2s
300V AC for 1minute
or 360V AC for 1s
Detent torque
7±5mN･m
12±5mN･m
16±7mN･m
17±8mN･m
（Initial）
12＋ 7
4 mN･m
−
（After reflow）
7±5mN･m
12±7mN･m
20±10mN･m
30±15mN･m
（Initial）
20±10mN･m
（After reflow）
Push-pull
strength
Push
300V AC for 1minute
or 360V AC for 2s
18±7mN･m
30±15mN･m
12±5mN･m
18±7mN･m
30±15mN･m
100N
Pull
100N
Shaft configuration
Ring type
Terminal type
Insertion
Switch type
—
—
—
—
—
—
Contact
arrangement
—
—
—
—
—
—
Travel（mm）
—
—
—
—
—
—
Operating force（N）
—
—
—
—
—
—
—
—
—
—
—
—
Rotational torque
—
—
—
—
—
—
Rating
—
—
—
—
—
—
Contact resistance
—
—
—
—
—
—
Operating life
—
—
—
—
—
—
307
308
Switch
Specifications Switch ON position
Page
302
305
Encoders Soldering Conditions ・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 315
Encoders Cautions・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 316
Note
● Indicates applicability to all products in the series.
272
Encoders Soldering Conditions
Reference for Manual Soldering
Series
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, EC28C, EC35CH
350℃ max.
3s max.
1 time
EC11J
350±10℃
3 ＋1
s
0
2 times
Encoders
Tip temperature
Reference for Dip Soldering
Dip soldering
No. of solders
Heating time
Soldering temperature
Soldering time
EC09E, EC11B, EC111, EC11E, EC11G,
EC11K, EC18A, EC21A, EC28A, EC35A,
EC35AH, EC35B, EC50A, EC60B
100℃ max.
2 min. max.
260±5℃
5±1s
2 times max.
EC10E, EC12D, EC12E, EM11B
100℃ max.
1 min. max.
260±5℃
3±1s
2 times max.
EC40A
110℃ max.
1 min. max.
260℃ max.
10s max.
1 time
100℃ max.
2 min. max.
260℃ max.
EM20B
80℃ max.
1 min. max.
260℃ max.
3s max.
2 times max.
2 times max.
Ring
Type
Example of Reflow Soldering Condition
Temperature profile
300
Temperature (˚C )
Hollow
Shaft
EC45A
5s max.
Insulated
Shaft
Soldering surfacetemperature
Metal
Shaft
Preheating
Series
A
B
200
C
D
100
Room
temperature
Time (s)
Pre-heating
E max.
F max.
G max.
H max.
Series
A
B
C
D
E
F
G
H
No. of reflows
EC11J
260℃
230℃
180℃
150℃
2 min. max.
3s
40s
4 min. max.
2 times max.
EC05E
250℃ min.
230℃ min.
180℃
150℃
60s to 120s
ー
30s to 40s
ー
2 times max.
EC21C
230℃ to 245℃
220℃
200℃
150℃
60s to 120s
ー
25s to 60s
300s max.
1 time max.
260℃
230℃
180℃
150℃
2 min. min.
3s
40s
230s max.
1 time max.
EC28C, EC35CH
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.
315
