285
Encoders Metal
Shaft Insulated
Shaft Hollow
Shaft Ring
Type
Highly reliable non-contact type achieving
40-pulse high resolution
20mm Size Metal Shaft Magnetic Type
EM20B
■Typical Specifications
Items Specifications
Output signal
VHI：＋4.0V min.
VLO：0.5V max. （lsink=5mA）
Rating
10mA 5V DC
Operating life
500,000 cycles
Operating temperature range
−10℃ to ＋70℃
1. This product uses a Hall IC. Be aware of ESD damages.
2. Custom design for shaft configuration are available upon request.
Notes
40 Vertical
40 With Without 480 960
1. 3μs e c .
（TYP）
16 8±5 EM20B4014000
Product No.
Minimum order unit （pcs.）
Japan Export
Number of
detent
Number
of pulse
Length of the
shaft （mm）
Push
switch
Display
function Response time
Operating
direction
Detent torque
（mN・m）
Product Line
Photo
Dimensions Unit:mm
Style
With push-on switch
（travel 0.5mm）
PC board mounting hole dimensions
（Viewed from mounting side）
20
11.5
1.5 9.5
ø21.5
16 13 Snap-in
5.5
C0.5
ø9
3.5
1
2.4
ø4
3
7.5
3.3
Switch terminal
0.5
Switch
travel
3.9
7
1.8
11.1
2.6
6-ø0.6 holes
2-ø
1 holes
2.54
29.25˚
BGA
VB
VA
A
10.2
GB
5
S1S2
VA, VB MMM
Power supply
GA, GB MMM Ground
A, B MMMMMMMM Out put
Number of packages （pcs.） Export package measurements
（mm）
1 case /Japan
1 case /export packing
480 960 378×527×262
Packing Specifications
Tray
Refer to P.286 for switches.
Refer to P.307 for soldering conditions.
286
Encoders Metal
Shaft Insulated
Shaft Hollow
Shaft Ring
Type
Switch type
Momentary push switch
Contact arrangement
Single pole and single throw（Push-on）
Travel（mm）
0.5XXX
Operating force
6±3N
Operating life
25,000 times
Electrical
performance
Rating
3A 16V DC (10mA 16V DC min. ratings）
Contact resistance
100mΩ max. for initial period, 200mΩ max. after operating life.
Insulation resistance
100MΩ min. 250V DC
Voltage proof
300V AC for 1 minute or 360V AC for 2s
20mm Size Metal Shaft Magnetic Type/
Switch Specifications
Type
Metal shaft
11mm size 20mm size
Series
EC111 EC11K
EC11J
EM11B EC20A/RK203 EM20B
Photo
Output
Self-return switch Incremental （Two phase A and B）
Shaft types
Single-shaft
Operating direction
Vertical
Number of pulse /
Number of detent
—9 /18
15 / 3 0 16 /16 18 /18 40/40
Features
— — Surface
Mount type Magnetic type —Magnetic type
Dimensions
（mm）
W
11. 7 10 . 8 20.2 20
D
13 12 14 . 2 11 19 . 2 22.25
H
54.5 7. 5 10 13
Operating temperature range
−40℃ to +85℃ −30℃ to +85℃ −30℃ to +80℃ −10℃ to +70℃
Operating life
15,000 cycles 100,000 cycles
1,000,000 cycles
30,000 cycles 500,000 cycles
Automotive use
●●●●●—
Life cycle (availability)
Electrical
performance
Rating
10 mA 5 V D C
10 m A 5 V±5 % D C
1m A 5 V D C
10 m A 5 V±5 % D C
Max./min. operating current
（Resistive load）
10mA / 1mA 15mA / − —15mA / −
Insulation resistance
10 0 MΩ min . 25 0 V D C
10 0 MΩ min .10 0 V DC 10 MΩ min . 5 0 V D C
10 0 MΩ min . 25 0 V D C
Voltage proof
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
or 300V AC for 2s
50V AC for 1 minute
or 60V AC for 2s
300V AC for 1 minute
or 360V AC for 2s
Mechanical
performance
Rotational torque
（Without detent）
3 to 30mN･m ————7mN･m max.
Detent torque
—12 ±5 m N･m
12±5mN･m （Initial）
12±4mN･m （After reflow）
10 ±5 m N･m 40±20mN･m 8±5mN･m
Push-pull strength
10 0 N
Shaft configuration
Flat, Slotted, Serrated Flat
Terminal type
Insertion Reflow Insertion
Switch
Specifications
Switch type
Push-on switch
Contact
arrangement
Single pole and single throw （Push-on）
Travel （mm） 0.5±0.3
1.5±0.5
0.5±0.3
1.5±0.5
0.5±0.3
1.5±0.5 0.5 1.5±0.5 0.5
Operating force （N）
6 4±2 5±2 4±2 5±2 4±2 5.5±3 4±2 6±3
Rating
0.1A 5V DC
（500μA 5V DC min. ratings）
0.1A 5V DC
（0.1mA 5V DC min. ratings）
5mA 5V DC
（50mA 12V DC max. ratings）
0.5A 16V DC
（1mA 16V DC min. ratings）
3 A 16 V D C
（10mA 16V DC min. ratings）
Contact resistance
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.
Operating life
20,000 times
1,000,000
times
100,000
times
1,000,000
times
100,000
times
1,000,000 times 20,000 times 25,000 times
Page
269 280 282 285
Encoders Soldering Conditions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 307
Encoders Cautions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 308
Note
●Indicates applicability to all products in the series.
263
Encoders Metal
Shaft Insulated
Shaft Hollow
Shaft Ring
Type
＋ 2.5
− 2
＋ 0.4
− 0.3
＋ 0.3
− 0.2
NEW
307
Encoders Metal
Shaft Insulated
Shaft Ring
Type
Hollow
Shaft
Soldering surfacetemperature
Soldering temperature
Heating time Soldering time No. of solders
EC10E, EC12D, EC12E, EM11B
EC45A
EC40A
EM20B
EC09E, EC11B, EC111, EC11E, EC11G,
EC11K, EC18A, EC21A, EC28A, EC35A,
EC35AH, EC35B, EC50A, EC60B
Series
10 0 ℃ m a x . 260±5℃2 min. max. 5 ±1s 2 time max.
10 0 ℃ m a x .
10 0 ℃ m a x .
110 ℃ m a x .
80℃ max.
260±5℃
260℃ max.
260℃ max.
260℃ max.
1 min. max.
2 min. max.
1 min. max.
1 min. max.
3 ±1s
5s max.
10 s ma x .
3s max.
2 time max.
2 time max.
1 time
2 time max.
Preheating Dip soldering
Reference for Dip Soldering
Example of Reflow Soldering Condition
Reference for Manual Soldering
EC05E
EC21C
EC11J
Series
260℃ 230℃ 18 0 ℃ 15 0 ℃ 2 min. max. 3s 40s 4 min. max. 2 time max.
250℃ min.
230℃ to 245℃
230℃ min.
220℃
18 0 ℃
200℃
15 0 ℃
15 0 ℃
60s to 120s
60s to 120s
ー
ー
30s to 40s
25s to 60s
ー
300 max.
2 time max.
1 time max.
A B C D E F G H No. of reflows
Temperature profile
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.
注記
300
200
100
A
B
C
Time (s)
G max.
F max.
H max.
E max.
Room
temperature
Temperature (˚C )
Pre-heating
D
Encoders Soldering Conditions
3 s
EC11J
EC05E, EC09E, EC10E, EC111, EC11B,
EC11E, EC11G, EC11K, EC12D, EC12E,
EC18A, EC21A, EC28A, EC35A, EC35AH,
EC35B, EC40A, EC45A, EC50A, EC60B,
EM11B, EM20B, EC21C
Series
350℃ max. 3s max. 1 time
3 5 0 ±10 ℃ 2 time
Tip temperature Soldering time No. of solders
＋1
0
