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D4A-[]N

General-purpose Limit Switch

D4A-[]N

The Limit Switch with Better Seal, Shock Resistance, and Strength

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last update: April 1, 2021

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SPDT, Double-break Switches

Receptacle box G 1/2 Conduit
Indicator Without indicator With neon lamp
indicator (AC)		 With LED
indicator (DC)
Actuator Model Approved
standards		 Model Approved
standards		 Model
Roller
lever *1		 Standard 328_lu_1_1
D4A-3101N UL,
CSA		 D4A-3301N UL,
CSA		 D4A-3E01N
High-
sensitivity		 328_lu_1_2
D4A-3102N UL,
CSA		 D4A-3302N UL,
CSA		 D4A-3E02N
Low-torque 328_lu_1_3
D4A-3103N UL,
CSA		 --- --- ---
High-
sensitivity,
Low-
torque		 328_lu_1_4
D4A-3104N UL,
CSA		 D4A-3304N UL,
CSA		 ---
Maintained *2 328_lu_1_5 D4A-3105N UL,
CSA		 D4A-3305N UL,
CSA		 D4A-3E05N
Side
plunger		 Standard 328_lu_1_6 D4A-3106N UL,
CSA		 --- UL,
CSA		 ---
Vertical
roller		 328_lu_1_7 D4A-3107-VN UL,
CSA		 D4A-3307-VN UL,
CSA		 D4A-3E07-VN
Horizontal
roller		 328_lu_1_8 D4A-3107-HN UL,
CSA		 D4A-3307-HN UL,
CSA		 ---
Adjustable 328_lu_1_9 D4A-3108N UL,
CSA		 D4A-3308N UL,
CSA		 D4A-3E08N
Top
plunger		 Standard 328_lu_1_10 D4A-3109N UL,
CSA		 D4A-3309N UL,
CSA		 ---
Roller 328_lu_1_11 D4A-3110N UL,
CSA		 D4A-3310N UL,
CSA		 ---
Adjustable 328_lu_1_12 D4A-3111N UL,
CSA		 D4A-3311N UL,
CSA		 ---
Flexible
rod		 Spring wire 328_lu_1_13 D4A-3112N UL,
CSA		 D4A-3312N UL,
CSA		 D4A-3E12N
Plastic rod 328_lu_1_14 D4A-3114N UL,
CSA		 D4A-3314N UL,
CSA		 D4A-3E14N
Cat whisker 328_lu_1_15 D4A-3115N UL,
CSA		 D4A-3315N UL,
CSA		 D4A-3E15N
Coil spring 328_lu_1_16 D4A-3116N UL,
CSA		 D4A-3316N UL,
CSA		 D4A-3E16N

Note: 1. Switches are also available with []1/2-14 NPT conduits. The model numbers correspond as follows:
              (Examples) G 1/2 Conduits 1/2-14 NPT Conduits
                                    D4A-3[][][]N D4A-1[][][]N
                                    D4A-4[][][]N D4A-2[][][]N
           2. Switches are also available with fluoro-rubber seals for higher resistance to chemicals. (The operating
                temperature range for these Switches, however, is −10 to +120°C.) Add “-F” to the model number. (Example:
                D4A-3101N becomes D4A-3101N-F.) Ask your nearest OMRON representative for details.
                Not all combinations are possible. Ask your OMRON representative for details.
*1. The lever is not included with the Roller Level Models. Select the lever from those listed in this data sheet and order it
       separately (refer to Levers on Data Sheet).
*2. The Maintained Switches have a lock mechanism for the switch operation and thus use a Fork Lever Lock.

DPDT, Double-break Switches

Receptacle box G 1/2 Conduit
Indicator Without indicator With neon lamp
indicator (AC)		 With LED
ndicator (DC)
Actuator Model Approved
standards		 Model Model
Roller
lever *1		 Standard 328_lu_2_1 D4A-4501N UL,
CSA		 D4A-4L01N D4A-4P01N
High-
sensitivity		 328_lu_2_2 D4A-4502N UL,
CSA		 --- ---
Low-
torque		 328_lu_2_3 D4A-4503N UL,
CSA		 --- ---
High-
sensitivity,
Low-torque		 328_lu_2_4 D4A-4504N UL,
CSA		 --- ---
Maintained * 2 328_lu_2_5 D4A-4505N UL,
CSA		 --- ---
Sequential
operation		 328_lu_2_6 D4A-4717N UL,
CSA		 --- ---
Center neutral
operation		 328_lu_2_7 D4A-4918N UL,
CSA		 --- ---
Side
plunger		 Standard 328_lu_2_8 D4A-4506N UL,
CSA		 --- ---
Vertical roller 328_lu_2_9 D4A-4507-VN UL,
CSA		 --- ---
Horizontal roller 328_lu_2_10 D4A-4507-HN UL,
CSA		 --- ---
Adjustable 328_lu_2_11 D4A-4508N UL,
CSA		 --- ---
Top
plunger		 Standard 328_lu_2_12 D4A-4509N UL,
CSA		 --- ---
Roller 328_lu_2_13 D4A-4510N UL,
CSA		 D4A-4L10N D4A-4P10N
Adjustable 328_lu_2_14 D4A-4511N UL,
CSA		 --- ---
Flexible
rod		 Spring wire 328_lu_2_15 D4A-4512N UL,
CSA		 --- ---
Plastic rod 328_lu_2_16 D4A-4514N UL,
CSA		 --- ---
Cat whisker 328_lu_2_17 D4A-4515N UL,
CSA		 --- ---
Coil spring 328_lu_2_18 D4A-4516N UL,
CSA		 --- ---

Note: 1. Switches are also available with []1/2-14 NPT conduits. The model numbers correspond as follows:
              (Examples) G 1/2 Conduits 1/2-14 NPT Conduits
                                    D4A-3[][][]N D4A-1[][][]N
                                    D4A-4[][][]N D4A-2[][][]N
          2. Switches are also available with fluoro-rubber seals for higher resistance to chemicals. (The operating
               temperature range for these Switches, however, is −10 to +120°C.) Add “-F” to the model number. (Example:
               D4A-4501N becomes D4A-4501N-F.) Ask your nearest OMRON representative about delivery times and prices.
*1. The lever is not included with the Roller Level Models. Select the lever from those listed in this data sheet and order it
     separately (refer to Levers on Data Sheet).
*2. The Maintained Switches have a lock mechanism for the switch operation and thus use a Fork Lever Lock.

Individual Parts

Receptacle box

Type G1/2 conduit * 1 1/2-14NPT conduit * 2
Appearance Model Approved standards Model Approved standards
SPDT double-break 328_lu_3_1 D4A-3000N UL, CSA D4A-1000N UL, CSA
DPDT double-break 328_lu_3_2 D4A-4000N UL, CSA D4A-2000N UL, CSA

*1. M6-screw mounting (standard mounting)
*2. 10-32UNF-screw mounting (standard mounting)

Switch Box

Indicator Without
indicator		 With neon lamp
indicator (AC)		 With LED
indicator (DC)
Appearance Model Approved
standards		 Model Approved
standards		 Model
SPDT
double-break		 328_lu_4_1
(Without indicator lamp)		 D4A-0100N UL,
CSA		 D4A-0300N UL,
CSA		 D4A-0E00N
DPDT
double-break		 328_lu_4_2
(Without indicator lamp)		 Simultaneous
operation		 D4A-0500N UL,
CSA		 D4A-0L00N --- D4A-0P00N
Sequential
operation		 D4A-0700N UL,
CSA		 --- --- ---
Center neutral
operation		 D4A-0900N UL,
CSA		 --- --- ---

Heads

Appearance Model Approved standards
Roller lever * 1 328_lu_5_1 Standard D4A-0001N UL, CSA
High-sensitivity D4A-0002N UL, CSA
Low-torque * 2 D4A-0003N UL, CSA
Sequential operation: * 3 D4A-0017N UL, CSA
Center neutral operation: * 3 D4A-0018N UL, CSA
328_lu_5_2 Maintained D4A-0005N UL, CSA
Side plunger 328_lu_5_3 Standard D4A-0006N UL, CSA
328_lu_5_4 Vertical roller D4A-0007-VN UL, CSA
328_lu_5_5 Horizontal roller D4A-0007-HN UL, CSA
328_lu_5_6 Side adjustable D4A-0008N UL, CSA

*1. Levers for Roller Lever Switches are optionally available. Select the lever from those listed in this data sheet and
        order (refer to Levers on Data Sheet).
*2. The D4A-C00 adjustable roller lever is too heavy and long for these heads and it should not be used or mechanical
       malfunction will result.
*3. These heads cannot be used for double break operations.

Appearance Type Model Approved standards
Top plunger 328_lu_6_1 Standard D4A-0009N UL, CSA
328_lu_6_2 Roller D4A-0010N UL, CSA
328_lu_6_3 Adjustable D4A-0011N UL, CSA
Flexible rod 328_lu_6_4 Spring wire D4A-0012N UL, CSA
328_lu_6_5 Plastic rod D4A-0014N UL, CSA
328_lu_6_6 Cat whisker D4A-0015N UL, CSA
328_lu_6_7 Coil spring D4A-0016N UL, CSA

Levers

Actuator Model
Roller Lever D4A-A00
D4A-A10
D4A-A20
D4A-A30
D4A-B06
Adjustable Roller Lever D4A-C00
D4A-D00
Resin Loop Lever D4A-F00
Fork Lever Lock D4A-E30
D4A-E20
D4A-E10
D4A-E00

Note: Refer to Dimensions for Lever shapes and applicable models.

last update: April 1, 2021

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