CSM_A165K_DS_E_3_4
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 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 2.
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
(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
2
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
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.
Screw-less clamp connector
Number of
notches Output Reset method Key release position Model
2 notches DPDT Manual
Left A165K-J2ML-2S
Right A165K-J2MR-2S
Left and right A165K-J2M-2S
Automatic Left A165K-J2AL-2S
3 notches DPDT Manual
Center A165K-J3MC-2S
Left A165K-J3ML-2S
Right A165K-J3MR-2S
Left, right, and center A165K-J3M-2S
Number of
notches Output Reset method Key release position Model
2 notches DPDT Manual
Left A165K-A2ML-2S
Right A165K-A2MR-2S
Left and right A165K-A2M-2S
Automatic Left A165K-A2AL-2S
3 notches DPDT Manual
Center A165K-A3MC-2S
Right A165K-A3MR-2S
Left A165K-A3ML-2S
Left, right, and center A165K-A3M-2S
Number of
notches Output Reset method Key release position Model
2 notches DPDT Manual
Left A165K-T2ML-2S
Right A165K-T2MR-2S
Left and right A165K-T2M-2S
Automatic Left A165K-T2AL-2S
3 notches DPDT Manual
Center A165K-T3MC-2S
Left A165K-T3ML-2S
Right A165K-T3MR-2S
Left, right, and center A165K-T3M-2S
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.)
Switches (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
Switch Units with Screw-less Clamp Connectors
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
Switches
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 2 to 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 torque (OF) max. 0.1 N·m
Set position (SP) 90±5°45°
+10
0
(75°)
90°
FP
FP
45°
(45°)
45°
(45°)
Two notches Three notches
SW2 SW1
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%.
Screw-less Clamp Wiring Procedure
Connecting Wires
1. Strip the wires for 10 mm (allowable range: 10± 1 mm).
2. If braided wire is used, twist the wire to straighten it out.
3. Insert the wire into the insertion hole while pressing the release
button at the side of the hole. (Using a precision screwdriver is
recommended.)
4. Let go of the release button to lock the wire into place.
5. After locking, pull on the wire gently to confirm that it is securely
locked.
Removing Wires
1. Remove wires by pulling them while pressing the release button.
Note: When reusing wires that have already been locked one, cut off the end of
the wire and strip the wire again before using.
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
Terms and Conditions Agreement
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.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses 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. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials 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 user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
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 part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2018.4
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 2018 All Right Reserved.