Metal shaft
Type
11mm size
20mm size
Series
EM11B
EM20B
EC111
EC11K
EC11J
EC20A/RK203
NEW
Photo
Self-return switch
Incremental（Two phase A and B）
Output
Single-shaft
Vertical
Shaft types
Operating direction
Number of pulse /
Number of detent
9/18
15/30
—
—
16/16
18/18
40/40
Surface
Mount type
—
Magnetic type
—
Magnetic type
Features
11.7
12
10.8
11
20.2
19.2
10
20
22.25
13
W
Dimensions
（mm）
13
5
14.2
D
H
4.5
7.5
−40℃ to +85℃
●
−30℃ to +85℃ −30℃ to +80℃ −10℃ to +70℃
Operating temperature range
Operating life
15,000 cycles
●
100,000 cycles
1,000,000 cycles
●
30,000 cycles
●
500,000 cycles
—
●
Automotive use
Life cycle (availability)
10mA 5V DC
10mA / 1mA
10mA 5V±5% DC
15mA / −
1mA 5V DC
—
10mA 5V±5% DC
15mA / −
Rating
Max./min. operating current
（Resistive load）
Electrical
performance
100MΩ min. 250V DC
100MΩ min.100V DC
10MΩ min. 50V DC
100MΩ min. 250V DC
Insulation resistance
300V AC for 1 minute
or 360V AC for 2s
300V AC for 1 minute
or 360V AC for 1s
250V AC for 1 minute 50V AC for 1 minute 300V AC for 1 minute
Voltage proof
or 300V AC for 2s
or 60V AC for 2s
or 360V AC for 2s
Rotational torque
（Without detent）
3 to 30mN･m
—
—
—
—
—
7mN･m max.
Mechanical
12±5mN･m（Initial）
12±4mN･m（After reflow）
12±5mN･m
10±5mN･m
40±20mN･m
8±5mN･m
Detent torque
performance
100N
Push-pull strength
Flat, Slotted, Serrated
Insertion
Flat
Shaft configuration
Terminal type
Switch type
Reflow
Push-on switch
Insertion
Contact
Single pole and single throw（Push-on）
arrangement
＋0.3
＋0.4
0.5±0.3 1.5±0.5 0.5±0.3 1.5±0.5 0.5±0.3 1.5±0.5
＋2.5
0.5
1.5±0.5
0.5
Travel（mm）
Operating force（N）
Rating
−0.2
−0.3
Switch
6ꢀ
4±2
5±2
4±2
5±2
4±2
5.5±3
4±2
6±3
− 2
Specifications
0.1A 5V DC
0.1A 5V DC
（0.1mA 5V DC min. ratings）
5mA 5V DC
0.5A 16V DC
3A 16V DC
（500μA 5V DC min. ratings）
（50mA 12V DC max. ratings） （1mA 16V DC min. ratings） （10mA 16V DC min. ratings）
100mΩ max. for initial period,ꢀ
200mΩ max. after operating life.
500mΩ max. for initial period,ꢀ
5mΩ max. after operating life.
100mΩ max. for initial period,ꢀ
200mΩ max. after operating life.
Contact resistance
1,000,000 100,000 1,000,000 100,000
20,000 times
1,000,000 times
280
20,000 times
282
25,000 times
285
Operating life
Page
times
times
times
times
269
Encoders Soldering Conditions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・307
Encoders Cautions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・308
Note
● Indicates applicability to all products in the series.
263
ALPS [ ALPS ELECTRIC CO.,LTD. ]
