Safety Limit Switch

D4N

Popular Safety Limit Switches Providing a Full Lineup Conforming to International Standards

Switches with Two Contacts (with Direct Opening Mechanism)

Actuator

Conduit size

Built-in switch mechanism

1NC/1NO
 (Snap-action)

2NC
 (Snap-action)

1NC/1NO
 (Slow-action)

2NC
 (Slow-action)

Model

Model

Model

Model

Roller lever
 (resin lever,
 resin roller)
 
 image

1-conduit

Pg13.5

D4N-1120

D4N-1220

D4N-1A20

D4N-1B20

G1/2

D4N-2120

D4N-2220

D4N-2A20

D4N-2B20

M20

D4N-4120

D4N-4220

D4N-4A20

D4N-4B20

M12 connector

D4N-9120

D4N-9220

D4N-9A20

D4N-9B20

2-conduit

G1/2

D4N-6120

D4N-6220

---

D4N-6B20

M20

D4N-8120

D4N-8220

D4N-8A20

D4N-8B20

Roller lever
 (metal lever,
 resin roller)
 
image

1-conduit

Pg13.5

D4N-1122

D4N-1222

D4N-1A22

D4N-1B22

G1/2

D4N-2122

D4N-2222

D4N-2A22

D4N-2B22

M20

D4N-4122

D4N-4222

D4N-4A22

D4N-4B22

M12 connector

D4N-9122

D4N-9222

D4N-9A22

D4N-9B22

2-conduit

G1/2

D4N-6122

D4N-6222

D4N-6A22

D4N-6B22

M20

D4N-8122

D4N-8222

D4N-8A22

D4N-8B22

Roller lever
 (metal lever,
 metal roller)
 
image

1-conduit

Pg13.5

D4N-1125

D4N-1225

D4N-1A25

D4N-1B25

G1/2

D4N-2125

D4N-2225

D4N-2A25

D4N-2B25

M20

D4N-4125

D4N-4225

D4N-4A25

D4N-4B25

M12 connector

D4N-9125

D4N-9225

D4N-9A25

D4N-9B25

Roller lever
 (metal lever,
 bearing roller)
 
image

1-conduit

Pg13.5

D4N-1126

D4N-1226

D4N-1A26

---

G1/2

D4N-2126

D4N-2226

D4N-2A26

D4N-2B26

M20

D4N-4126

D4N-4226

D4N-4A26

D4N-4B26

M12 connector

D4N-9126

D4N-9226

D4N-9A26

---

Adjustable roller
 lever, form lock
 (metal lever,
 resin roller)
 
image

1-conduit

Pg13.5

D4N-112G

D4N-122G

D4N-1A2G

D4N-1B2G

G1/2

D4N-212G

D4N-222G

D4N-2A2G

D4N-2B2G

M20

D4N-412G

D4N-422G

D4N-4A2G

D4N-4B2G

M12 connector

D4N-912G

D4N-922G

D4N-9A2G

D4N-9B2G

2-conduit

G1/2

D4N-612G

D4N-622G

D4N-6A2G

D4N-6B2G

M20

D4N-812G

---

---

D4N-8B2G

Adjustable roller
 lever, form lock
 (metal lever,
 rubber roller)
 
image

1-conduit

Pg13.5

D4N-112H

D4N-122H

D4N-1A2H

D4N-1B2H

G1/2

D4N-212H

D4N-222H

D4N-2A2H

D4N-2B2H

M20

D4N-412H

D4N-422H

D4N-4A2H

D4N-4B2H

M12 connector

D4N-912H

D4N-922H

D4N-9A2H

---

2-conduit

G1/2

D4N-612H

---

D4N-6A2H

---

M20

D4N-812H

D4N-822H

D4N-8A2H

D4N-8B2H

Plunger
 
image

1-conduit

Pg13.5

D4N-1131

D4N-1231

D4N-1A31

D4N-1B31

G1/2

D4N-2131

D4N-2231

D4N-2A31

D4N-2B31

M20

D4N-4131

D4N-4231

D4N-4A31

D4N-4B31

M12 connector

D4N-9131

D4N-9231

D4N-9A31

D4N-9B31

2-conduit

G1/2

D4N-6131

D4N-6231

D4N-6A31

D4N-6B31

M20

D4N-8131

D4N-8231

D4N-8A31

D4N-8B31

Roller plunger
 
image

1-conduit

Pg13.5

D4N-1132

D4N-1232

D4N-1A32

D4N-1B32

G1/2

D4N-2132

D4N-2232

D4N-2A32

D4N-2B32

M20

D4N-4132

D4N-4232

D4N-4A32

D4N-4B32

M12 connector

D4N-9132

D4N-9232

D4N-9A32

D4N-9B32

2-conduit

G1/2

D4N-6132

D4N-6232

D4N-6A32

D4N-6B32

M20

D4N-8132

D4N-8232

D4N-8A32

D4N-8B32

One-way roller
 arm lever
 (horizontal)
 
image

1-conduit

Pg13.5

D4N-1162

D4N-1262

D4N-1A62

D4N-1B62

G1/2

D4N-2162

D4N-2262

D4N-2A62

D4N-2B62

M20

D4N-4162

D4N-4262

D4N-4A62

D4N-4B62

M12 connector

D4N-9162

D4N-9262

D4N-9A62

D4N-9B62

2-conduit

G1/2

D4N-6162

D4N-6262

D4N-6A62

D4N-6B62

M20

D4N-8162

D4N-8262

D4N-8A62

D4N-8B62

One-way roller
 arm lever
 (vertical)
 
image

1-conduit

Pg13.5

D4N-1172

D4N-1272

D4N-1A72

D4N-1B72

G1/2

D4N-2172

D4N-2272

D4N-2A72

D4N-2B72

M20

D4N-4172

D4N-4272

D4N-4A72

D4N-4B72

M12 connector

D4N-9172

D4N-9272

D4N-9A72

D4N-9B72

2-conduit

G1/2

D4N-6172

---

---

---

M20

D4N-8172

D4N-8B72

Switches with Three Contacts and MBB Contacts (with Direct Opening Mechanism)

Actuator

Conduit size

Built-in switch mechanism

2NC/1NO
 (Slow-action)

3NC
 (Slow-action)

1NC/1NO MBB
 (Slow-action)

2NC/1NO MBB
 (Slow-action)

Model

Model

Model

Model

Roller lever
 (resin lever, resin roller)
 
image

1-conduit

Pg13.5

D4N-1C20

D4N-1D20

---

D4N-1F20

G1/2

D4N-2C20

D4N-2D20

D4N-2E20

D4N-2F20

M20

D4N-4C20

D4N-4D20

D4N-4E20

D4N-4F20

2-conduit

G1/2

D4N-6C20

D4N-6D20

---

D4N-6F20

M20

D4N-8C20

---

---

Roller lever
 (metal lever, resin roller)
 
image

1-conduit

Pg13.5

D4N-1C22

D4N-1D22

D4N-1E22

---

G1/2

D4N-2C22

D4N-2D22

---

D4N-2F22

M20

D4N-4C22

D4N-4D22

D4N-4E22

D4N-4F22

2-conduit

G1/2

D4N-6C22

D4N-6D22

---

---

M20

D4N-8C22

---

D4N-8F22

Roller lever
 (metal lever, metal roller)
 
image

1-conduit

Pg13.5

D4N-1C25

D4N-1D25

---

---

G1/2

D4N-2C25

D4N-2D25

D4N-2E25

D4N-2F25

M20

D4N-4C25

D4N-4D25

---

D4N-4F25

Roller lever
 (metal lever, bearing roller)
 
image

1-conduit

Pg13.5

D4N-1C26

D4N-1D26

---

D4N-1F26

G1/2

D4N-2C26

D4N-2D26

D4N-2F26

M20

D4N-4C26

D4N-4D26

D4N-4F26

Adjustable roller lever,
 form lock
 (metal lever, resin roller)
 
image

1-conduit

Pg13.5

D4N-1C2G

D4N-1D2G

---

---

G1/2

D4N-2C2G

D4N-2D2G

D4N-2E2G

D4N-2F2G

M20

D4N-4C2G

D4N-4D2G

D4N-4E2G

D4N-4F2G

2-conduit

G1/2

D4N-6C2G

D4N-6D2G

---

---

M20

D4N-8C2G

---

Adjustable roller lever,
 form lock
 (metal lever, rubber roller)
 
image

1-conduit

Pg13.5

D4N-1C2H

D4N-1D2H

---

---

G1/2

D4N-2C2H

D4N-2D2H

M20

D4N-4C2H

---

D4N-4F2H

Plunger
 
image

1-conduit

Pg13.5

D4N-1C31

D4N-1D31

---

D4N-1F31

G1/2

D4N-2C31

D4N-2D31

D4N-2E31

D4N-2F31

M20

D4N-4C31

D4N-4D31

D4N-4E31

D4N-4F31

2-conduit

G1/2

D4N-6C31

---

D4N-6E31

D4N-6F31

M20

D4N-8C31

D4N-8D31

---

D4N-8F31

Roller plunger
 
image

1-conduit

Pg13.5

D4N-1C32

D4N-1D32

D4N-1E32

D4N-1F32

G1/2

D4N-2C32

D4N-2D32

D4N-2E32

D4N-2F32

M20

D4N-4C32

D4N-4D32

D4N-4E32

D4N-4F32

2-conduit

G1/2

D4N-6C32

D4N-6D32

D4N-6E32

---

M20

D4N-8C32

D4N-8D32

---

D4N-8F32

One-way roller arm lever
 (horizontal)
 
image

1-conduit

Pg13.5

D4N-1C62

D4N-1D62

D4N-1E62

---

G1/2

D4N-2C62

D4N-2D62

---

D4N-2F62

M20

D4N-4C62

D4N-4D62

D4N-4E62

D4N-4F62

2-conduit

G1/2

D4N-6C62

D4N-6D62

---

D4N-6F62

M20

D4N-8C62

D4N-8D62

---

One-way roller arm lever
 (vertical)
 
image

1-conduit

Pg13.5

D4N-1C72

D4N-1D72

D4N-1E72

---

G1/2

D4N-2C72

D4N-2D72

---

D4N-2F72

M20

D4N-4C72

D4N-4D72

---

2-conduit

M20

D4N-8C72

D4N-8D72

---

---

General-purpose Switches with Two Contacts

Actuator

Conduit size

Built-in switch mechanism

1NC/1NO
 (Snap-action)

2NC
 (Snap-action)

1NC/1NO
 (Slow-action)

2NC
 (Slow-action)

Model

Model

Model

Model

Fork lever lock
 (right operation)

image

1-conduit

G1/2

---

---

D4N-2ARE

D4N-2BRE

M20

D4N-4ARE

D4N-4BRE

Fork lever lock
 (left operation)

image

G1/2

D4N-2ALE

D4N-2BLE

M20

D4N-4ALE

D4N-4BLE

Cat whisker

image

G1/2

D4N-2180

D4N-2280

---

D4N-2B80

M20

D4N-4180

D4N-4280

D4N-4B80

Plastic rod

image

G1/2

D4N-2187

D4N-2287

D4N-2B87

M20

D4N-4187

D4N-4287

D4N-4B87

Note: Mechanically speaking, these models are general-purpose switches with no direct opening mechanism. 

General-purpose Switches with Three Contacts and MBB Contacts

Actuator

Conduit size

Built-in switch mechanism

2NC/1NO
 (Slow-action)

3NC
 (Slow-action)

1NC/1NO MBB
 (Slow-action)

2NC/1NO MBB
 (Slow-action)

Model

Model

Model

Model

Fork lever lock
 (right operation)

image

1-conduit

G1/2

D4N-2CRE

---

---

D4N-2FRE

M20

D4N-4CRE

D4N-4DRE

D4N-4ERE

D4N-4FRE

Fork lever lock
 (left operation)

image

G1/2

D4N-2CLE

---

---

D4N-2FLE

M20

D4N-4CLE

D4N-4DLE

D4N-4ELE

---

Cat whisker

image

G1/2

---

D4N-2D80

---

---

M20

D4N-4D80

Plastic rod

image

G1/2

D4N-2D87

M20

D4N-4D87

Note: Mechanically speaking, these models are general-purpose switches with no direct opening mechanism.