A165ST2M2 - OMRON AUTOMATION & SAFETY

CSM_A165S_W_DS_E_4_3

Knob-type Selector Switch (Detachable) (Cylindrical 16-dia.)

A165S/W

Separate Construction with Cylindrical

16-dia. Body

• Same separate construction as the A16-series Pushbuttons with

Miniature Design of 28.5 mm

• The same contacts can be used for both standard loads and

microloads.

• Oil-resistant IP65 models

• Conforms to EN60947-5-1.

Refer to Safety Precautions for All Pushbutton Switches/

Indicators and Safety Precautions on page 15.

List of Models

Model

Rectangular Square Round

Solder

terminals A165@-J Series A165@-A Series A165@-T Series

Voltage-

reduction

lighting

A165@-J Series A165@-A Series A165@-T Series

Screw-

less

clamp

connector

A165@-J Series A165@-A Series A165@-T Series

A165S/W

Model Number Structure

Model Number Legend ..... The model numbers used to order sets of Units are illustrated below. One set comprises the Selector, Lamp

(lighted models only), and Switch.

For information on combinations, refer to Ordering Information on page 3.

(1) (2) (3) (4) (5) (6)

A165W - A 2A R - 24D - 1

(3) Number of Notches/

Resetting Method

Symbol

No. of

notches Reset

method

2 notches

Manual

2A Automatic

3 notches

Manual

3A Automatic

(1) Lighted/

Non-lighted

(2) Shape of

Selector

Symbol

Type

SNon-

lighted

W Lighted

Symbol

Shape

JRectan-

gular

A Square

T Round

(4) Color of Selector

Symbol

Color

symbol

Black

(non-lighted

models only)

RRed

G Green

YYellow

(6) Contact Configuration

Note: 1. Only DPDT contacts are available with

3-notch models and Screw-less Clamp

models.

2. PCB terminals are available only with

2-notch models.

(5) Light Source

Symbol

Type Terminal

1 SPDT Solder terminal

2DPDT

1P SPDT PCB terminal

2P DPDT

2S DPDT Screw-less Clamp

Symbol

Type

No symbol Non-lighted

24D 24-V LED

Voltage Reduction Unit (24-V Built-in LED)

Note: 1. Solder terminals are only available with 100-V models.

2. The Voltage Reduction Unit is not available for models with

PCB terminals.

3. "T2" is available only for the Screw-less Clamp type.

Symbol

Type Operating voltage Rated voltage

T1 LED 100/110 VAC/VDC 110 VAC/VDC

T2 200/220 VAC/VDC 220 VAC/VDC

A165S/W

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, Lamp (lighted models only), and Switch.

Solder Terminals

Note: Enter the desired color symbol for the Selector in @: R (red); Y (yellow); G (green). The Selector for non-lighted models is black.

Rectangular

A165@-J

Oil-resistant IP65

No. of notches Output Reset method Lighting method Model

2 notches

SPDT

Manual LED A165W-J2M@-24D-1

Non-lighted A165S-J2M-1

Automatic LED A165W-J2A@-24D-1

Non-lighted A165S-J2A-1

DPDT

Manual LED A165W-J2M@-24D-2

Non-lighted A165S-J2M-2

Automatic LED A165W-J2A@-24D-2

Non-lighted A165S-J2A-2

3 notches DPDT Manual LED A165W-J3M@-24D-2

Non-lighted A165S-J3M-2

Square

A165@-A

Oil-resistant IP65

No. of notches Output Reset method Lighting method Model

2 notches

SPDT

Manual LED A165W-A2M@-24D-1

Non-lighted A165S-A2M-1

Automatic LED A165W-A2A@-24D-1

Non-lighted A165S-A2A-1

DPDT

Manual LED A165W-A2M@-24D-2

Non-lighted A165S-A2M-2

Automatic LED A165W-A2A@-24D-2

Non-lighted A165S-A2A-2

3 notches DPDT Manual LED A165W-A3M@-24D-2

Non-lighted A165S-A3M-2

Round

A165@-T

Oil-resistant IP65

No. of notches Output Reset method Lighting method Model

2 notches

SPDT

Manual LED A165W-T2M@-24D-1

Non-lighted A165S-T2M-1

Automatic LED A165W-T2A@-24D-1

Non-lighted A165S-T2A-1

DPDT

Manual LED A165W-T2M@-24D-2

Non-lighted A165S-T2M-2

Automatic LED A165W-T2A@-24D-2

Non-lighted A165S-T2A-2

3 notches DPDT Manual LED A165W-T3M@-24D-2

Non-lighted A165S-T3M-2

A165S/W

Ordering Information

Ordering Individually......... Selectors, Lamps, 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.

Selector (Listed on Page 5.)

Switch (Listed on Page 7.)

Note: Switch Units that combine a Lamp and a Switch are also available.

Rectangular Models Square Models Round Models

Lamp

Note: Temperature rises in incandescent

lamps can cause heat deformation.

LED only

Lighted Models Non-lighted Models

Solder terminals

(no transformer)

Lighted/non-lighted

PCB terminals

Lighted/non-lighted

A165S/W

Ordering Information

Ordering Individually .........Selectors, Lamps, and Switches (Sockets) 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 (Oil-resistant IP65 Models Only)

Note: The selector for non-lighted models is black.

Appearance Number of

notches Reset method Lighting method Model Selector color

symbol

Rectangular

(A165@-J)

2 notches

Manual LED A165W-J2M@

Enter the desired color

symbol for the Selec-

tor in @.

R (red),

Y (yellow),

G (green)

Non-lighted A165S-J2M

Automatic LED A165W-J2A@

Non-lighted A165S-J2A

3 notches

Manual LED A165W-J3M@

Non-lighted A165S-J3M

Fully

automatic

LED A165W-J3A@

Non-lighted A165S-J3A

Square

(A165@-A)

2 notches

Manual LED A165W-A2M@

Enter the desired color

symbol for the Selec-

tor in @.

R (red),

Y (yellow),

G (green)

Non-lighted A165S-A2M

Automatic LED A165W-A2A@

Non-lighted A165S-A2A

3 notches

Manual LED A165W-A3M@

Non-lighted A165S-A3M

Fully

automatic

LED A165W-A3A@

Non-lighted A165S-A3A

Round

(A165@-T)

2 notches

Manual LED A165W-T2M@

Enter the desired color

symbol for the Selec-

tor in @.

R (red),

Y (yellow),

G (green)

Non-lighted A165S-T2M

Automatic LED A165W-T2A@

Non-lighted A165S-T2A

3 notches

Manual LED A165W-T3M@

Non-lighted A165S-T3M

Fully

automatic

LED A165W-T3A@

Non-lighted A165S-T3A

A165S/W

Ordering Information

Sets .............................................. Select an Operation Unit and a Switch Unit (Lamp and Switch).

Switch Units (A Switch Unit includes a Switch and a Lamp.)

Switch Units with Voltage Reduction Units (Solder Terminals)

Note: The LED has a 24-VAC/VDC circuit built in.

Insert one of the following letters into the box (@).

Operation Unit Set with Knob-type Selector Switch

Appearance Number of notches Classification Model

2 notches SPDT

24 V Solder terminals

A16W-2N@-24D-1

DPDT A16W-2N@-24D-2

3 notches DPDT A16W-3N@-24D-2

Appearance Classification Operating voltage Model

Standard loads and

microloads

2 notches SPDT

100/110 VAC/VDC

A16L-@-T1-1

2 notches DPDT A16L-@-T1-2

3 notches A16W-3N@-T1-2

Symbol

Light color

RRed

YYellow

G Green

Rectangular Models Square Models Round Models

Switch Unit with Voltage-reduction Lighting Switch Unit with Screw-less Clamp Connectors

Note: The LED has a 24-VAC/VDC circuit

built in.

Note: Non-lighted models do not include a

Lamp.

Voltage-

reduction

Lighting

Lamp

Lighted/

Non-lighted

Models

Lamp

Lighted Models Lighted/Non-lighted Models

A165S/W

Ordering Information

Switch Units with Screw-less Clamp Connectors

Note: The 100-V models and 200-V models have a 24-VAC/VDC

circuit built in.

Ordering Individually

Switches

Lamps

Accessories and Tools (Order Separately)

Accessories

Tools

Appearance Classification Model Remarks

Standard

loads and

microloads

2 notches

DPDT

Non-lighted A16-2S Used for Pushbutton

Switches and

Knob-type Selector

Switches.

Lighted

No voltage-reduction lighting A16L-Δ-@-2S

Voltage-reduction

lighting

100/110 VAC/VDC

A16L-Δ-T1-2S

200/220 VAC/VDC

A16L-Δ-T2-2S

3 notches

DPDT

Non-lighted A16S-3N-2LS

Lighted

No voltage-reduction lighting A16W-3NΔ-@-2S

Voltage-reduction

lighting

100/110 VAC/VDC

A16W-3N-Δ-T1-2S

200/220 VAC/VDC

A16W-3N-Δ-T2-2S

Appearance Classification Model

Lighted

Switches (without

voltage-reduction

lighting)

2 notches SPDT

Solder terminal

A16S-2N-1L

DPDT A16S-2N-2L

3 notches DPDT A16S-3N-2L

Non-lighted 2 notches SPDT A16S-2N-1

DPDT A16S-2N-2

3 notches DPDT A16S-3N-2

Lighted

2 notches

SPDT

PCB terminal

A16S-2N-1LP

DPDT A16S-2N-2LP

Non-lighted SPDT A16S-2N-1P

DPDT A16S-2N-2P

Operating voltage

Light color

Super-bright

5 VDC 12 VAC/VDC 24 VAC/VDC

Red

A16-5DSR

A16-12DSR A16-24DSR

Yellow A16-5DSY A16-12DSY A16-24DSY

Green A16-5DSG A16-12DSG A16-24DSG

Name Appearance Classification Model Remarks

Panel Plugs

Rectangular A16ZJ-3003 Used for covering the panel cut-

outs for future panel expansion.

Degree of protection: IP40

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.

Tighten to a torque of

0.39 N·m min.

Extractor A16Z-5080 Yes Yes Yes Yes Yes

Convenient for

extracting the

Switches and Lamps.

Insert symbols in Δ and @.

Δ@

Symbol

Light color

Symbol Type

Operating voltage

R Red 5D

LED

5 VDC

Y Yellow 12D 12 VAC/VDC

G Green 24D 24 VAC/VDC

Ordering as a Set: Refer to page 3. ■ Specifications and dimensions: Refer to pages 8 to 10.

■ Accessories, replacements, and tools: Refer to this page

A165S/W

Specifications

Approved Standard Ratings

Ratings

Switch Ratings

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

Super-bright LED

Characteristics

Socket Unit

* With LED not mounted.

(Perform testing with the LED not mounted.)

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.

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

Rated

voltage Rated

current Operating

voltage Internal limiting

resistor

5 VDC

8 mA

5 VDC±5% Red, yellow: 300 Ω

Green: 160 Ω

12 VAC/VDC 12 VAC/VDC

Red, yellow: 1 kΩ

Green: 910 Ω

24 VAC/VDC 24 VAC/VDC

5% 2.4 k

COM

Item Type Knob-type Selector Switch

Allowable

operating

frequency

Mechanical 20 operations/minute max.

Electrical 10 operations/minute max.

Insulation resistance 100 MΩ min. (at 500V DC)

Contact resistance 100 mΩ max. (initial value)

Dielectric

strength

Between termi-

nals of same

polarity

1,000 VAC, 50/60 Hz for 1 min

Between ter-

minals of dif-

ferent polarity 2,000 VAC, 50/60 Hz for 1 min

Between each

terminal and

ground

2,000 VAC, 50/60 Hz for 1 min

Between lamp

terminals

1,000 VAC, 50/60 Hz for 1 min*

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.

Electrical 100,000 operations min.

Electric shock protection

class Class II

PTI (tracking characteristic)

175

Degree of contamination 3 (IEC60947-5-1)

Weight Approx. 13 g

(in the case of a lighted DPDT switch)

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 mm20.5 mm20.75 mm21.25 mm2

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

Characteristics

Knob-type Selector Switch

2 notches 3 notches

Operating torque (OF) max. 0.1 N·m

Set position (SP) 90±5°45°

+10

A165S/W

Nomenclature

Model structure

For information on rotating the flange, refer to page 14.

Example: Knob-type Selector Switch with Two Notches

(Standard condition when shipped)

Note: The angle is 75° for self-resetting models.

The flange can be rotated to easily change the

operation angle of the knob.

peci

ications

Operation Angle Contact Form

(75°)

Two notches Three notches

90°

45°

(45°)

45°

(45°)

Note: The angle used for automatic reset is

shown in parentheses.

FP: Free Position

No. of

notches

Contact from

SPDT DPDT

Posi-

tion SW Posi-

tion SW2 SW1

2 notches

3 notches

---

SW1SW2

●Color of Selector

· LED models

Red Yellow Green

· Non-lighted models

Black

●Lighting Method

· Lighted (LED) models

(The upper face of the

knob is illuminated.)

· Non-lighted models

●Number of Notches and Reset Method

· 2 Notches: Manual reset, Automatic reset

· 3 Notches: Manual reset, Automatic reset

●Switch Specifications

5 A at 125 VAC

5 A at 250 VAC

3 A at 30 VDC

Minimum applicable load:

1 mA at 5 VDC

●Flange Shape

Rectangular

(A165@-J)

●Protective

Structure

Oil-resistant IP65

●Terminal Type

Solder terminals

PCB terminals

Square

(A165@-A)

Round

(A165@-T)

Selector

Switch

90°

(75°)

90°90°

A165S/W

Dimensions • The Dimension shows 2-switch outputs. • The lamp terminal is not provided with non-lighted models. (Unit: mm)

10.8

9.5

M16×1

Lock rin

Mounting nut

Model, ratings, standard

Lamp terminal

12.2

21.1

28.5

18.5

Packing (t0.5)

12.4 15.8

4.85

Rectangular A165@-J

Solder terminals (tab terminals #110)

Note: See page 12 for panel cutouts.

10.8

9.5

M16×1

Lock ring

Mounting nut

Model, ratings, standard

12.2

21.1

28.5

18.5

Packing (t0.5)

12.4 15.8

4.85

Lamp terminal

Square A165@-A

Solder terminals (tab terminals #110)

Note: See page 12 for panel cutouts.

10.8

9.5

M16×1

Lock ring

Mounting nut

Model, ratings, standard

12.2

21.1

28.5

18.5

Packing (t0.5)

12.4 15.8

4.85

Lamp terminal

Round A165@-T

Solder terminals (tab terminals #110)

Note: See page 12 for panel cutouts.

A165S/W

Dimensions • The Dimension shows 2-switch outputs. • A rectangular model is listed as an example. (Unit: mm)

M16×1

Mounting nut

Lock ring

Packing (t0.5)

18.5 28.3

9.5 21.1

10.8

20.4

4.85

0.5

12.4 18.6

6.3

0.5

18.4

Rectangular A165@-J

PCB terminals

Note: See page 12 for panel cutouts.

• The lamp terminal is not

also provided with non-

lighted models.

Case

Selector

9.5 21.1

28.518.5

189.8

0.5

0.5 Direction-indication arrow

M16×1

12.2

42.7

50.1

(22.4)

18 20.6

10.8

16.68.8

12.42.8

Switch

Mounting nut

Lock ring

Packing (t0.5)

2.8

24 min.

23 min.

16 dia.

+0.2

Panel Cutouts

Rectangular A165W@-T

Reduced-voltage lighting

solder terminals

(tab terminals #110)

Mounting nut

Lock ringSwitch dismounting lever

Packing (t0.5)

27.4(31.7) 23.5

23.924

9.5

18.5 48.9

M16×1

10.8

25 min.

Panel Cutouts

33 min.

16 dia.

+0.2

Rectangular A165@-2S

Screw-Less Clamp

• The lamp terminal is

also provided with non-

lighted models.

A165S/W

Dimensions (Unit: mm)

Panel Cutouts

Models with Solder Terminals and Models with Screw-less Clamp Connectors

Models with PCB Terminals

Terminal Arrangement

Models with Solder Terminals without Reduced-voltage Lighting (Lamp terminals are not provided with the Non-lighted

Knob-type Selector Switches and Key-type Selector Switches.)

Rectangular A165@-J Square A165@-A, Round A165@-T

Note: 1. Make sure the thickness of the mounting panel is 0.5 to 3.2 mm.

2. If the panel is to be finished with coating, etc., make sure that the panel meets the specified dimensions after coating.

3. Figures in parentheses are for screw-less clamp connectors.

Rectangular A165@-J Square A165@-A, Round A165@-T

Note: 1. Ensure that the variation in the distance between the centers of neighboring mounting holes is less than ±0.1 mm.

2. Make sure the thickness of the mounting panel is 0.5 to 3.2 mm. If, however, a Switch Guard or Dust Cover is used, the thickness of the mounting panel must

be 0.5 to 2 mm.

3. If the panel is to be finished with coating, etc., make sure that the panel meets the specified dimensions after coating.

Lighted SPDT Switches Lighted DPDT Switches

Non-lighted SPDT Switches Non-lighted DPDT Switches

24 min.

(25 min.)

19 min.

(33 min.)

(Top View)

16 dia.

+0.2

19 min.

(25 min.)

16 dia.

+0.2

19 min.

(33 min.)

(Top View)

24 min.

14.7±0.05 dia.

9.1±0.05

5.1±0.05

(Top View)

16 dia.

+0.2

24 min.

9.1±0.05

5.1±0.05

14.7±0.05 dia.

(Top View)

16 dia.

+0.2

2.6

0.9

1.5

2.8 Lamp terminal

12.2

7.4

NC L-

COM

SW1

Dimensions of

Terminal Holes

Terminal Arrangement

(Bottom View)

Note: The L+ is not shown

on the Switch.

2.6

0.9

1.5

2.8 Lamp terminal

12.2

7.4

COM

NC L-

COM

SW2SW1

Dimensions of

Terminal Holes

Terminal Arrangement

(Bottom View)

Note: The L+ is not shown

on the Switch.

2.6

0.9

1.5

2.8

12.2

7.4

Side with TOP

indicated

COM

SW1

Dimensions of

Terminal Holes

Terminal Arrangement

(Bottom View)

2.6

0.9

1.5

2.8

12.2

7.4

Side with TOP

indicated

COM

SW2

SW1

Dimensions of

Terminal Holes

Terminal Arrangement

(Bottom View)

A165S/W

Dimensions (Unit: mm)

Models with PCB Terminals

Note: For details of the terminal arrangement for Screw-Less Clamps, refer to the corresponding section for the A16.

Lighted SPDT Switches Lighted DPDT Switches

Model, rating, and lot

number indication

4.85

18.6

Lamp terminal (t=0.5)

1.5

3.5

5.3

2.7

0.8

12.4

Side with TOP

indicated

NC L-

COM

SW1

Dimensions of

PCB Terminals

Terminal Arrangement

(Bottom View)

4.85

0.05

Side with TOP indicated

A = 24 min.: Rectangular

A = 21 min.: Square/Round

L = 24 min.

Use t = 1.6 for the PCB.

PCB Cutouts

(Bottom View)

20±0.1

6.3±0.05

Five, 1 dia.

Two, 5 dia.

A±0.1

L±0.1

12.4±0.05

Note: Secure the panel to the board using stud bolts if force will

be applied to the board after wiring.

1.5

3.5

5.3

2.7

0.8

4.85

18.6

12.4

Lamp terminal (t=0.5)

Side with TOP

indicated

COM

NC L-

COM

SW2SW1

Dimensions of

PCB Terminals

Terminal Arrangement

(Bottom View)

6.3±0.05

Two, 5 dia.

Eight, 1 dia.

A±0.1

L±0.1

Side with TOP indicated

4.85

0.05

20±0.1

12.4±0.05

PCB Cutouts

(Bottom View)

A = 24 min.: Rectangular

A = 21 min.: Square/Round

L = 24 min.

Use t = 1.6 for the PCB.

Note: Secure the panel to the board using stud bolts if force will

be applied to the board after wiring.

A165S/W

Dimensions (Unit: mm)

Non-lighted Models with PCB Terminals (Lamp terminals are not provided with the Non-lighted Knob-type Selector

Switches and Key-type Selector Switches.)

For details on mounting the Switch to a panel, and mounting and dismounting the Switch, refer to

installation details for the A16 Pushbutton Switch.

Flange Rotation (All Selector Switches)

Non-lighted SPDT Switches Non-lighted DPDT Switches

Model, rating, and lot

number indication

Dimensions of

PCB Terminals

Terminal Arrangement

(Bottom View)

18.6

1.5

3.5

5.3

2.7

0.8

12.4

Side with TOP

indicated

COM

SW1

12.4±0.05

20±0.1

6.3±0.05

Three, 1 dia.

Two, 5 dia.

Side with TOP indicated

PCB Cutouts

(Bottom View)

A±0.1

L±0.1

A = 24 min.: Rectangular

A = 21 min.: Square/Round

L = 24 min.

Use t = 1.6 for the PCB.

Note: Secure the panel to the board using stud bolts if force will

be applied to the board after wiring.

1.5

3.5

5.3

2.7

0.8

18.6

12.4

Side with TOP

indicated

COM

SW2

SW1

Dimensions of

PCB Terminals

Terminal Arrangement

(Bottom View)

12.4±0.05

20±0.1

6.3±0.056.3±0.05

Six, 1 dia.

Two, 5 dia.

A±0.1

L±0.1

Side with TOP indicated

PCB Cutouts

(Bottom View)

A = 24 min.: Rectangular

A = 21 min.: Square/Round

L = 24 min.

Use t = 1.6 for the PCB.

Note: Secure the panel to the board using stud bolts if force will

be applied to the board after wiring.

Flange

Lock ring

Switch screw

Flange

Lock ring

Switch screw

A165 Knob-type Selector Switch

Fix the Switch screw and rotate the flange in

45° turns.

A165 Key-type Selector Switch

Fix the Switch screw and rotate the flange in

45° turns.

A165S/W

Safety Precautions

Refer to Safety Precautions for All Pushbutton Switches/Indicators.

Do not apply a voltage between the incandescent

lamp and the terminal that is greater than the rated

voltage. If the incandescent lamp is broken, the

operating part may pop out.

Always turn OFF the power and wait for 10 minutes

before replacing the incandescent lamp. If the lamp is

replaced immediately after the power is turned OFF,

the remaining heat may cause burns.

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%.

LED

•The LED current-limiting resistor is built-in, so external resistance

is not required.

WARNING

Precautions for Correct Use

Rated voltage Internal limiting resistor

5 VDC Red, yellow: 300 Ω

Green: 160 Ω

12 VAC/VDC Red, yellow: 1 kΩ

Green: 910 Ω

24 VAC/VDC 2.4 kΩ

Invalid

area

0.1 1 10 100 1,000

1 mA

0.15 mA

Current (mA)

Voltage (V)

Microload area

A165S/W

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.

2015.9

In the interest of product improvement, specifications are subject to change without notice.

OMRON Corporation

Industrial Automation Company

http://www.ia.omron.com/