CSM_A165K_DS_E_3_2
1
Key-type Selector Switch (Detachable) (Cylindrical 16-dia.)
A165K
Separate Construction with Cylindrical
16-dia. Body
• Short mounting depth, less than 28.5 mm below panel
• Wide range of switching capacity from standard to microload
• Oil-resistant IP65 models
Refer to Safety Precautions for All Pushbutton Switches/
Indicators and Safety Precautions on page 11.
List of Models
Model
Rectangular Square Round
Solder
terminals A165K-J Series A165K-A Series A165K-T Series
Screw-
less
clamp
connector
A165K-J Series
A165K-A Series A165K-T Series
A165K
2
Model Number Structure
Model Number Legend ..... The model numbers used to order sets of Units are illustrated below. One set comprises the Selector, Switch,
and 2 Keys.
For information on combinations, refer to Ordering Information on page 3.
(2) Number of Notches/Resetting Method
Symbol No. of
notches Reset
method Key release
position
2ML
2 notches Manual
Left
2MR Right
2M Left and right
2AL Automatic Left
3MC
3 notches Manual
Center
3MR Right
3ML Left
3M Left, right,
and center
3AC 3 notches Automatic Center
(1) Shape of Selector
Symbol Shape Color
J Rectangular
BlackA Square
T Round
(3) Contact Configuration
Note: Only DPDT contacts are available with
3-notch models.
Symbol Type Terminal
1 SPDT Solder Terminal
2DPDT
2S DPDT Screw-less Clamp
(1) (2) (3)
A165K- J 3ML - 2
A165K
3
Ordering Information
Ordering as a Set .................The model numbers used to order sets of Units are given in the following tables. One set comprises the
Selector, Switch and 2 Keys.
Solder Terminals
Number of
notches Output Reset method Key release position Model
2 notches
SPDT Manual
Left A165K-J2ML-1
Right A165K-J2MR-1
Left and right A165K-J2M-1
Automatic Left A165K-J2AL-1
DPDT Manual
Left A165K-J2ML-2
Right A165K-J2MR-2
Left and right A165K-J2M-2
Automatic Left A165K-J2AL-2
3 notches DPDT Manual
Center A165K-J3MC-2
Right A165K-J3MR-2
Left A165K-J3ML-2
Left, right, and center A165K-J3M-2
Number of
notches Output Reset method Key release position Model
2 notches
SPDT Manual
Left A165K-A2ML-1
Right A165K-A2MR-1
Left and right A165K-A2M-1
Automatic Left A165K-A2AL-1
DPDT Manual
Left A165K-A2ML-2
Right A165K-A2MR-2
Left and right A165K-A2M-2
Automatic Left A165K-A2AL-2
3 notches DPDT Manual
Center A165K-A3MC-2
Right A165K-A3MR-2
Left A165K-A3ML-2
Left, right, and center A165K-A3M-2
Number of
notches Output Reset method Key release position Model
2 notches
SPDT Manual
Left A165K-T2ML-1
Right A165K-T2MR-1
Left and right A165K-T2M-1
Automatic Left A165K-T2AL-1
DPDT Manual
Left A165K-T2ML-2
Right A165K-T2MR-2
Left and right A165K-T2M-2
Automatic Left A165K-T2AL-2
3 notches DPDT Manual
Center A165K-T3MC-2
Right A165K-T3MR-2
Left A165K-T3ML-2
Left, right, and center A165K-T3M-2
A165K-J
Rectangular Models
Oil-resistant IP65
A165K-A
Square Models
Oil-resistant IP65
A165K-T
Round Models
Oil-resistant IP65
A165K
4
Ordering Information
Ordering Individually......... Selectors and Switches can be ordered separately. Combinations that are not available as sets can be created
using individual Units. Also, store the parts as spares for maintenance and repairs.
Operation Units (Listed on Page 5.)
Socket Units (Listed on Page 5.)
(75°)
90°
FP
FP
45°
(45°)
45°
(45°)
Switches with
2 Notches
Switches with
3 Notches
Rectangular
(A165K-J)
Square
(A165K-A)
Round
(A165K-T)
(Standard condition when shipped)
·Two keys are provided. Note: The figures in parentheses are for
self-resetting models.
FP: Free position
Solder terminals PCB terminals Screw-less clamp
connector
A165K
5
Ordering Information
Ordering Individually .........Selectors and Switches can be ordered separately. Combinations that are not available as sets can be created
using individual Units. Also, store the parts as spares for maintenance and repairs.
Selectors
Switches
Switches with Screw-less Clamp
Appearance Number of notches Reset method Key release position Model
Rectangular
(A165K-J)
2 notches Manual
A165K-J2ML
A165K-J2MR
A165K-J2M
Automatic A165K-J2AL
3 notches Manual
A165K-J3MC
A165K-J3MR
A165K-J3ML
A165K-J3M
Automatic A165K-J3AC
Square
(A165K-A)
2 notches Manual
A165K-A2ML
A165K-A2MR
A165K-A2M
Automatic A165K-A2AL
3 notches Manual
A165K-A3MC
A165K-A3MR
A165K-A3ML
A165K-A3M
Automatic A165K-A3AC
Round
(A165K-T)
2 notches Manual
A165K-T2ML
A165K-T2MR
A165K-T2M
Automatic A165K-T2AL
3 notches Manual
A165K-T3MC
A165K-T3MR
A165K-T3ML
A165K-T3M
Automatic A165K-T3AC
Appearance Classification Model
Switch
2 notches
SPDT
Solder terminal
A16S-2N-1
DPDT A16S-2N-2
3 notches DPDT A16S-3N-2
2 notches
SPDT
PCB terminal
A16S-2N-1P
DPDT A16S-2N-2P
Appearance Classification Model Remarks
Common to standard
load and microload. DPDT
2 notches
Non-lighted
A16-2S Common to ones
for pushbutton
switches.
3 notches A16S-3N-2LS ---
A165K
6
Ordering Information
Accessories and Tools (Order Separately)
Accessories
Tools
Key
Note: Two Keys are provided.
Name Appearance Classification Model Remarks
Panel Plugs
Rectangular A16ZJ-3003 Used for covering the panel
cutouts for future panel
expansion.
Degree of protection: IP40
Color: Black
Square A16ZA-3003
Round A16ZT-3003
Name Appearance Model
Applicable types
Remarks
Pushbutton
Switch
Knob-type
Selector
Switch
Key-type
Selector
Switch
Emergency
Stop
Switch Indicator
Screw Fitting A16Z-3004 Yes Yes Yes Yes Yes
Convenient
for ganged
installation.
Extractor A16Z-5080 Yes Yes Yes Yes Yes
Convenient for
extracting the
Lamp from a
Solder-terminal
Socket Unit.
Appearance Model
A165K-KEY
Ordering as a Set: Refer to page 3. ■
Specifications, and dimensions: Refer to page 7 to 10.
■ Accessories, replacements, and tools: Refer to this page.
A165K
7
Specifications
Approved Standard Ratings
Ratings
Contacts
Minimum applicable load: 1 mA at 5 VDC
Rated values are obtained from tests conducted under the following conditions.
1. Load: Resistive load
2. Mounting conditions: No vibration and no shock
3. Temperature: 20±2°C
4. Operating frequency: 20 times/min
Contact Form
Characteristics
Socket Units
Screw-less Clamp
Operating Characteristics
UL, cUL (File No. E41515) TÜV (EN60947-5-1) (Low Voltage Directive) CCC (GB14048.5)
5 A at 125 VAC, 3 A at 250 VAC (general use)
3 A at 30 VDC (resistive)
Note: Certification has been obtained for the Switch Unit.
For detailed information on individual products that
have received certification, consult your supplier.
3 A at 250 VAC
3 A at 30 VDC
5 A at 125 VAC
3 A at 250 VAC
3 A at 30 VDC
Rated voltage Resistive load
125 VAC 5 A
250 VAC 3 A
30 VDC 3 A
Name Contact form
SPDT COM
NC
NO
Item Type Key-type Selector Switch
Allowable
operating
frequency
Mechanical 20 operations/minute max.
Electrical 10 operations/minute max.
Insulation resistance 100 MΩ min. (at 500 VDC)
Contact resistance 100 mΩ max. (intial value)
Dielectric
strength
Between terminals
of same polarity
1,000 VAC, 50/60 Hz for 1 minute
Between terminals
of different polarity
2,000 VAC, 50/60 Hz for 1 minute
Between each ter-
minal and ground
2,000 VAC, 50/60 Hz for 1 minute
Vibration
resistance Malfunction 10 to 55 Hz, 1.5-mm double amplitude
(malfunction within 1 ms)
Shock
resistance
Destruction 500 m/s2 max.
Malfunction 150 m/s2 max. (malfunction within 1 ms)
Durability Mechanical 250,000 operations min. (durability of key:
10,000 operations min.)
Electrical 100,000 operations min.
Electric shock protection
class Class II
PTI (tracking characteristic) 175
Degree of contamination 3 (IEC60947-5-1)
Weight Approx. 26.5 g (in the case of a DPDT
switch key)
Ambient operating
temperature
−10°C to 55°C
(with no icing or condensation)
Ambient operating humidity
35% to 85%RH
Ambient storage
temperature
−25°C to 65°C
(with no icing or condensation)
Item Type Screw-less Clamp
Recommended wire size
0.5 mm2 twisted wire or 0.8 mm-dia. solid wire
Usable
wires and
tensile
strength
Twisted wire
0.3 mm
2
0.5 mm
2
0.75 mm
2
1.25 mm
2
Solid wire
0.5 mm dia. 0.8 mm dia. 1.0 mm dia. ---
Tensile strength
10 N 20 N 30 N 40 N
Length of exposed wire
10 ±1 mm
Compliant standards JIS C 2811 Terminal Blocks for Industrial Use
Type Key-type Selector Switch
Characteristics 2 notches 3 notches
Operating force (OF) max. 0.1 N·m
Set position (SP) 90±5°45°+10
0
Operation Angle
Note: The angle used for automatic reset is shown in parentheses.
FP: Free position
(75°)
90°
FP
FP
45°
(45°)
45°
(45°)
Two notches Three notches
SW1 SW2
Contact Configuration
No. of
notches
Contact configuration
SPDT DPDT
Posi-
tion
SW
Posi-
tion
SW1 SW2
2
notches
3
notches
---
A165K
8
Nomenclature
Model Structure
For information on rotating the flange, refer to the A165S/W
datasheet.
Example: Knob-type Selector Switch with Two Notches
Square
(A165K-A)
●Flange Shape
Rectangular
(A165K-J)
●Key
●Number of Notches and Reset Method
· 2 Notches: Manual, Automatic
· 3 Notches: Manual, Automatic
●Switch Specifications
5 A at 125 VAC
5 A at 250 VAC
3 A at 130 VDC
Minimum applicable load
1 mA at 25 VDC
●Terminal Type
Solder terminals
PCB terminals
Round
(A165K-T)
●Protective
Structure
Oil-resistant IP65
Selector
Switch
The flange can be rotated to easily change the operation angle
of the knob.
90°
(75°)
90°90°
FP
(Standard condition when shipped)
Note: The angle is 75° for self-resetting models.
A165K
9
Dimensions The Dimension shows 2-switch outputs. (Unit: mm)
4
10.8
9.5
M16×1
Lock ring
Mounting nut
Model, rating, standard
18
12.2
21.1
28.5
34.5±1
Packing (t0.5)
12.4 15.8
2.8
1.5
1820
24
Rectangular A165K-J
Solder terminals (tab terminals #110)
* Refer to the A165S/W for Panel cutouts.
4
10.8
9.5
M16×1
Lock ring
Mounting nut
Model, rating, standard
18
12.2
21.1
28.5
34.5±1
Packing (t0.5)
12.4 15.8
2.8
1.5
1820
18
Square A165K-A
Solder terminals (tab terminals #110)
* Refer to the A165S/W for Panel cutouts.
4
10.8
9.5
M16×1
Lock ring
Mounting nut
Model, rating, standard
18
12.2
21.1
28.5
34.5±1
Packing (t0.5)
12.4 15.8
2.8
1.5
1820
18
Round A165K-T
Solder terminals (tab terminals #110)
* Refer to the A165S/W for Panel cutouts.
A165K
10
Dimensions
•
The Dimension shows 2-switch outputs.
•
The lamp terminal is also provided with non-lighted models.
•
A rectangular model is listed as an example.
(Unit: mm)
Terminal Arrangement
For information on the terminal arrangement, refer to the A165S/W datasheet.
Panel Mounting and Socket Unit Mounting and Removal
Refer to the A16 Pushbutton Switch datasheet.
Flange Rotation
Refer to the A165S/W datasheet.
Mounting nut
Lock ringSwitch dismounting lever
Packing (t0.5)
27.4(31.7) 23.5
23.924
9.5 48.9
24
18
M16×1
4
10.8
2
25 min.
Recommended panel
thickness: 0.5 to 3.2 mm
33 min.
16 dia.
+0.2
0
Panel Cutouts
Rectangular A165K@-2S
Screw-Less Clamp
A165K
11
Safety Precautions
Refer to Safety Precautions for All Pushbutton Switches/Indicators.
Mounting
•Always make sure that the power is turned OFF before mounting,
removing, or wiring the Switch, or performing maintenance.
•Do not tighten the mounting nut more than necessary using tools
such as pointed-nose pliers. Doing so will damage the mounting
nut.
The tightening torque is 0.29 to 0.49 N·m.
Wiring
•Solder terminals and quick-connect terminals (#110) are commonly
used for terminals.
•Be sure to use electrical wires that are a size appropriate for the
applied voltage and carry current (conductor size is 0.5 to 0.75
mm2). Perform soldering according to the conditions provided
below. If the soldering is not properly performed, the lead wires will
become detached, resulting in short-circuits.
1. Hand soldering: 350°C, within 3 s
2. Dip soldering: 350°C, within 3 s
Wait for one minute after soldering before exerting any external
force on the solder.
•Use non-corrosive resin fluid as the flux.
•Make sure that the electric cord is wired so that it does not touch
the Unit. If the electric cord touches the Unit, then electric wires with
a heat resistance of 100°C min. must be used.
•After wiring the Switch, maintain an appropriate clearance and
creepage distance.
Operating Environment
•The IP65 model is designed with a degree of protection so that it
will not sustain damage if it is subjected to water from any direction
to the front of the panel.
Using the Microload
•Insert a contact protection circuit, if necessary, to prevent the
reduction of life expectancy due to extreme wear on the contacts
caused by loads where inrush current occurs when the contact is
opened and closed.
•The A16 allows both a standard load (125 V at 5A, 250 V at 3 A)
and a microload. If a standard load is applied, however, the
microload area cannot be used. If the microload area is used with a
standard load, the contact surface will become rough, and the
opening and closing of the contact for a microload may become
unreliable.
•The minimum applicable load is the N-level reference value. This
value indicates the malfunction reference level for the reliability
level of 60% (λ 60) (conforming to JIS C5003).
The equation, λ 60 = 0.5 × 10-6/operations indicates that the
estimated malfunction rate is less than 1/2,000,000 operations with
a reliability level of 60%.
Precautions for Correct Use
Invalid
area
0.1 1 10 100 1,000
1 mA
5
12
24
30
0.15 mA
Current (mA)
Voltage (V)
0
Microload area
A165K
12
Others
•The oil-resistant IP65 uses NBR rubber and is resistant to general
cutting oil and cooling oil. Some particular oils cannot be used with
the oil-resistant IP65, however, so contact your OMRON
representative for details.
•If the panel is to be finished with coating, etc., make sure that the
panel meets the specified dimensions after the coating.
•Do not subject the Switch to extreme shock or vibration. Doing so
will cause malfunctions and damage to the Switch.
Do not let sharp objects come into contact with the Switches that
are made of resin. Doing so will damage the Switches, causing
scratches on the outside of the operating parts, and malfunction.
When handling the Switches, do not throw or drop them.
Do not allow the Switch
to drop and hit the
ground.
Do not place or drop
heavy objects on the
Switch.
Do not operate the Switch
with hard or sharp objects.
Screwdriver
Hammer
Read and Understand This Catalog
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or
comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified)
from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR
FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR COMMERCIAL LOSS
IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS
OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT
SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's
application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply to the
products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product,
machine, system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible
uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:
Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog.
Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles,
safety equipment, and installations subject to separate industry or government regulations.
Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE
SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons.
It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made.
However, some specifications of the products may be changed without any notice. When in doubt, special model numbers may be assigned to fix or
establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual
specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
PERFORMANCE DATA
Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the
result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON
Warranty and Limitations of Liability.
ERRORS AND OMISSIONS
The information in this document has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical,
typographical, or proofreading errors, or omissions.
2012.9
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2012 All Right Reserved.
