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  • Small Push Button Switch S Series
  • Small Push Button Switch S Series
  • Small Push Button Switch S Series
  • Small Push Button Switch S Series

Small Push Button Switch S Series SB-221N/O

4.67 (12)
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Item Feature
Number of Poles
Electrical Opening and Closing Durability
10000 times or more
Contact Resistance (mohm)
Less than ten (at DC2-4V 100mA)
Terminal Shape
Solder terminal
Current Capacity (A)
Resistance load 3A 125V AC 1.5A 250V AC
Withstand Voltage
AC2.0kV more than 1 ( AC1.5kV more than 1 minute)
The black button of AT-414 is pre-attached. Other operating units are sold separately.
Unipolar single throw
Functional Opreration
- OFF - (< > Is momentary)
Mechanical Opening and Closing Durability
50000 times or more
Dimensions A (mm)
Insulation Resistance
More than 200Mohm (DC500V)
Heat Resistant
In the case of using a soldering iron: Less than 350 degress within 3 seconds
Installation ring (AT-506), operation control button (AT-414, AT412)
circular nut (AT-504), internal-tooth washer (AT-508), hexagonal nut (AT-527), phi13.2 round-head button black (AT-414)
Customer Reviews
5 star 11
4 star 0
3 star 0
2 star 0
1 star 1
Review Rating: 4.67
12 Customer Reviews
The reviews are automatic translation.
For sub battery charge control.
From Japan
On 2017-10-13 15:08:58
Only for products of specialized manufacturers, always used with confidence. I do not hesitate to choose.
This review is about item#8600523.
Security switch for heavy machinery
From Japan
On 2017-10-02 16:02:29
It was used for wiring as a hidden switch for security of heavy equipment. It is useful.
This review is about item#8600523.
As navigation restart switch
From Japan
On 2017-04-24 16:17:45
Since I wanted to forcibly restart Navi only while driving, I bought this button because communication between navi and smartphone is interrupted until the next ride. Connection disappears when button is pushed and connected when you release your finger · · · ACC restart button.
This review is about item#34605277.
Tractor LED illumination light sw
From Japan
On 2017-03-12 19:25:19
Since SW last time melted and failed, it became possible to use it safely with ampere up and relay mounting.
This review is about item#75804233.
Electric wiring
From Japan
On 2016-07-29 17:40:16
There is no problem in quality because it is a maker item. It is more expensive than a trading company purchase, but it is saved because it can be purchased with a small number.
This review is about item#38444095.
Used as switch when confirming battery checker
From Japan
On 2016-05-29 09:26:30
Because there is space in the stroke of the mounting nut, it was attached to the wood board.
This review is about item#08600523.
It is used as a coil ON / OFF switch of Power relays.
From Japan
On 2016-05-23 17:24:33
Since the operation torque is large, the installation box moves, since the current capacity is not so much required, we request the product with light torque in the present shape.
This review is about item#38444086.
Foot switch for business use
From Japan
On 2015-02-16 13:44:40
Since I used a business foot switch for many years and malfunctioned, I tried disassembling and this part was used. I replaced it and it got better.
This review is about item#08600523.
Switch of printing machine
From Japan
On 2014-07-10 15:29:24
It is cheap and there is no problem with durability. I am satisfied and using it.
This review is about item#08600523.
As a repair part
From Japan
On 2014-04-03 13:32:11
When changing the switch, it is strong and good.
This review is about item#38444086.