Omron relays. General Purpose Relays. LY
Bipower RelaysPowerswitching Compact Generalpurpose Relays
Model Number Structure
Structure  Relays with Plugin Terminals 
Relays with PCB Terminals 
Casesurface mounting 

Classification  Number of poles 
With operation indicators 

Standard models Compliance with Electrical Appliances and Material Safety Act 
1  *LY1  **LY1N  *LY10  *LY1F  
2  *LY2  **LY2N  *LY20  *LY2F  
Bifur cated 
**LY2Z  **LY2ZN  **LY2Z0  **LY2ZF  
3  *LY3  **LY3N  *LY30  *LY3F  
4  *LY4  **LY4N  *LY40  *LY4F  
Models with diode for coil surge absorption (DC coil specification only) 
1  **LY1D  **LY1ND2      
2  **LY2D  **LY2ND2      
Bifur cated 
**LY2ZD  **LY2ZND2      
3  **LY3D  **LY3ND2      
4  **LY4D  **LY4ND2      
Models with CR circuits for coil surge absorption (AC coil specification only) 
1      
2  **LY2CR  **LY2NCR  
Bifur cated 
**LY2ZCR  **LY2ZNCR 
products for cells containing "" in the above table.
2. If #187 tab terminals are required, use the LY1FT2 or LY2FT2 (singlepole or doublepole models only).
3. Refer to Catalog for information on plugin terminal and socket combinations.
4. Items with an asterisk (*) in the table are certified for UL, CSA, and SEV. This is indicated with a certification
mark on the products.
5. Items with two asterisks (**) in the table are certified for UL and CSA. This is indicated with a certification mark
on the products.
6. All models in the table are certified for IEC (TÜV).
7. The models with plugin terminals (singlepole, doublepole, and 4pole) were combined with the PTFE for the
EC Declaration of Conformity. These products display the CE Marking.
Ordering Information
Models with Plugin Terminals
Number of poles  1 pole  2 poles  
Classification  Model  Rated voltage (V)  Model  Rated voltage (V)  
Models with single contacts 
Standard models  LY1  12, 24, 100/110, 110/120, or 200/220 VAC 
LY2  12, 24, 100/110,110/120, 200/220, or 220/240 VAC 

12, 24, 48, or 100/110 VDC  12, 24, 48, or 100/110 VDC  
Models with builtin operation indicators 
LY1N  12, 24, 100/110, 110/120, or 200/220 VAC 
LY2N  12, 24, 100/110, 110/120, 200/220, or 220/240 VAC 

12, 24, or 100/110 VDC  12, 24, 48, or 100/110 VDC  
Models with builtin diodes 
LY1D  12, 24, 48, or 100/110 VDC  LY2D  12, 24, 48, or 100/110 VDC  
Models with builtin diodes and operation indicators 
LY1ND2  12, 24, or 48 VDC  LY2ND2  12, 24, 48, or 100/110 VDC  
Models with builtin CR circuits 
    LY2CR  100/110, 110/120, 200/220, or 220/240 VAC 

Models with builtin CR circuits and operation indicators 
    LY2NCR  100/110, 110/120, 200/220, or 220/240 VAC 

Bifurcated contacts 
Standard models      LY2Z  100/110 or200/220 VAC  
    12, 24, 48, or 100/110 VDC  
Models with builtin operation indicators 
    LY2ZN  100/110, 110/120, 200/220, or 220/240 VAC 

    12 or 24 VDC  
Models with builtin diodes 
    LY2ZD  12, 24, or 48 VDC  
Models with builtin diodes and operation indicators 
    LY2ZND2  12, 24, or 100/110 VDC  
Models with builtin CR circuits 
    LY2ZCR  100/110 VAC  
Models with builtin CR circuits and operation indicators 
    LY2ZNCR  100, 110, 110/120, or 200/220 VAC 

Number of poles  3 poles  4 poles  
Classification  Model  Rated voltage (V)  Model  Rated voltage (V)  
Models with single contacts 
Standard models  LY3  12, 24, 100/110, or 200/220 VAC 
LY4  12, 24, 100/110, or 200/220 VAC 

12, 24, 48, or 100/110 VDC  12, 24, 48, or 100/110 VDC  
Models with builtin operation indicators 
LY3N  12, 24, 100/110, or 200/220 VAC 
LY4N  12, 24, 100/110, or 200/220 VAC 

12, 24, 48, or 100/110 VDC  12, 24, 48, or 100/110 VDC  
Models with builtin diodes 
LY3D  12, 24, 48, or 100/110 VDC  LY4D  12, 24, 48, or 100/110 VDC  
Models with builtin diodes and operation indicators 
LY3ND2  12, 24, or 100/110 VDC  LY4ND2  12, 24, 48, or 100/110 VDC  
Models with builtin CR circuits 
        
Models with builtin CR circuits and operation indicators 
        
Bifurcated contacts 
Standard models          
        
Models with builtin operation indicators 
        
        
Models with builtin diodes 
        
Models with builtin diodes and operation indicators 
        
Models with builtin CR circuits 
        
Models with builtin CR circuits and operation indicators 
       
Relays with PCB Terminals
Number of poles 
1 pole  2 poles  3 poles  4 poles  
Classification  Model  Rated voltage (V) 
Model  Rated voltage (V) 
Model  Rated voltage (V) 
Model  Rated voltage (V) 
Models with single contacts 
LY10  24,100/110, 110/120, or 200/220 VAC 
LY20  12, 24, 100/ 110, 110/120, 200/220, or 220/240 VAC 
LY30  24, 100/110, or 200/220 VAC 
LY40  24, 100/110, or 200/ 220 VAC 
12 or 24 VDC  12, 24, 48 or 100/110 VDC 
12, 24, 48, or 100/110 VDC 
12, 24, 48, or 100/110 VDC 

Bifurcated contacts 
    LY2Z0  100/110 VAC         
24, 48, or 100/110 VDC 
Casesurface Mounting
Number of poles  1 pole  2 poles  3 poles  4 poles  
Classification  Model  Rated voltage (V) 
Model  Rated voltage (V) 
Model  Rated voltage (V) 
Model  Rated voltage (V) 
Models with single contacts 
LY1F  24, 100/110, 110/120, 200/ 220, or 220/ 240 VAC 
LY2F  12, 24, 100/ 110, 110/120, 200/220, or 220/240 VAC 
LY3F  12, 24, 100/ 110, or 200/ 220 VAC 
LY4F  12, 24, 100/ 110, or 200/ 220 VAC 
6, 12, 24, or 100/110 VDC 
12, 24, 48, or 100/110 VDC 
12, 24, or 100/110 VDC 
12, 24, or 100/110 VDC 

Bifurcated contacts 
    LY2ZF  24, 100/110, or 200/220 VAC 
       
12 or 24 VDC 
Standard Models with Builtin Operation Indicators
Operating Coil, Singlepole and Doublepole Models
Item  Rated current (mA) 
Coil resist ance (Ω) 
Coil inductance (H)  Must operate voltage (V) 
Must release voltage (V) 
Maximum voltage (V) 
Power con sumption (VA, W) 

Rated voltage (V) 
50 Hz  60Hz  Armature OFF 
Armature ON 

AC  12  106.5  91  46  0.17  0.33  80% max. *1 
30% min. *2 
110% of rated voltage 
Approx. 1.0 to 1.2 (at 60 Hz) 
24  53.8  46  180  0.69  1.3  
50  25.7  22  788  3.22  5.66  
100/110  11.7/12.9  10/11  3,750  14.54  24.6  Approx. 0.9 to 1.1 (at 60 Hz) 

110/120  9.9/10.8  8.4/9.2  4,430  19.2  32.1  
200/220  6.2/6.8  5.3/5.8  12,950  54.75  94.07  
220/240  4.8/5.3  4.2/4.6  18,790  83.5  136.4  
DC  6  150  40  0.16  0.33  10% min. *2 
Approx. 0.9  
12  75  160  0.73  1.37  
24  36.9  650  3.2  5.72  
48  18.5  2,600  10.6  21.0  
100/110  9.1/10  11,000  45.6  86.2 
3 poles
Item  Rated current (mA) 
Coil resist ance (Ω) 
Coil inductance (H)  Must operate voltage (V) 
Must release voltage (V) 
Maximum voltage (V) 
Power con sumption (VA, W) 

Rated voltage (V) 
50 Hz  60Hz  Armature OFF 
Armature ON 

AC  12  159  134  24  0.12  0.21  80% max. *1 
30% min. *2 
110% of rated voltage 
Approx. 1.6 to 2.0 (at 60 Hz) 
24  80  67  100  0.44  0.79  
100/110  14.1/16  12.4/13.7  2,300  10.5  18.5  
200/220  9.0/10.0  7.7/8.5  8,650  34.8  59.5  
DC  12  112  107  0.45  0.98  10% min. *2 
Approx. 1.4  
24  58.6  410  1.89  3.87  
48  28.2  1,700  8.53  13.9  
100/110  12.7/13  8,500  29.6  54.3 
4 poles
Item  Rated current (mA) 
Coil resist ance (Ω) 
Coil inductance (H)  Must operate voltage (V) 
Must release voltage (V) 
Maximum voltage (V) 
Power con sumption (VA, W) 

Rated voltage (V) 
50 Hz  60Hz  Armature OFF 
Armature ON 

AC  12  199  170  20  0.1  0.17  80% max. *1 
30% min. *2 
110% of rated voltage 
Approx. 1.95 to 2.5 (at 60 Hz) 
24  93.6  80  78  0.38  0.67  
100/110  22.5/25.5  19/21.8  1,800  10.5  17.3  
200/220  11.5/13.1  9.8/11.2  6,700  33.1  57.9  
DC  12  120  100  0.39  0.84  10% min. *2 
Approx. 1.5  
24  69  350  1.41  2.91  
48  30  1,600  6.39  13.6  
100/110  15/15.9  6,900  32.0  63.7 
20% for the AC rated current and ±15% for the DC coil resistance.
2. The AC coil resistance and inductance values are reference values only. (at 60 Hz).
3. Operating characteristics were measured at a coil temperature of 23°C.
4. The maximum voltage capacity was measured at an ambient temperature of 23°C.
*1. There is variation between products, but actual values are 80% max.
To ensure operation, apply at least 80% of the rated value (at a coil temperature of +23° C).
*2. The actual values are 30% min. for AC and 10% min. for DC. To ensure release, use a value that is lower than the
specified value.
Refer to List of Certified Models for a list of models that are certified for safety standards and the Electrical Appliances and Material Safety Act.
Classification  1 pole  Double, 3, and 4pole models 
Bifurcated contacts  
Load  Resistive load 
Inductive load (cos φ = 0.4, L/R = 7 ms) 
Resistive load 
Inductive load (cos φ = 0.4, L/R = 7 ms) 
Resistive load 
Inductive load (cos φ = 0.4, L/R = 7 ms) 

Contact type  Single  Bifurcated  
Contact materials 
Ag alloy  Ag  
Rated load  15 A at 110 VAC 15 A at 24 VDC 
10 A at 110 VAC 7 A at 24 VDC 
10 A at 110 VAC 10 A at 24 VDC 
7.5 A at 110 VAC 5 A at 24 VDC 
5 A at 110 VAC 5 A at 24 VDC 
4 A at 110 VAC 4 A at 24 VDC 

Rated carry current 
15 A  10 A  7 A  
Maximum contact voltage 
250 VAC 125 VDC 
250 VAC 125 VDC 
250 VAC 125 VDC 

Maximum contact current 
15 A  15 A  10 A  10 A  7 A  7 A  
Type  Singlepole and doublepole models (standard models and bifurcated contact models) 
Singlepole, doublepole models (models with builtin operation indicators, models with builtin diodes, and models with builtin CR circuits), 3pole and 4pole models 

Ambient operating temperature 
25 to 55°C (with no icing or condensation) *1 
25 to +40°C (with no icing or condensation) *2 

Ambient operating humidity 
5% to 85% 
diode junction temperature and the elements used.
2. Refer to the ambient temperature and contact carry current characteristics data on Catalog for information on
operation in temperature conditions that are not described here.
3. When you apply a minimum of 10 A of current to an LY1 when it is used in combination with a PTF08A,
PTF08AE, or PT08, connect each of the following terminal pairs: (1) to (2), (3) to (4), and (5) to (6).
*1. If the carry current is 4 A or less, the usable ambient temperature range is −25 to 70° C.
*2. If the flowing current is 4 A or less, the usable ambient temperature range is 25 to 55° C.
Characteristics
Type  Standard models, models with builtin operation indicators, models with builtin CR circuits, and models with builtin diodes 
Bifurcated contacts  
Contact resistance *1  50 mΩ max.  
Operating time *2  25 ms max.  
Release time *2  25 ms max.  
Maximum operating frequency 
Mechanical  18,000 operations/h  
Rated load  1,800 operations/h  
Insulation resistance *3  100 MΩ min.  
Dielectric strength 
Between coil and contacts 
2,000 VAC at 50/60 Hz for 1 min.  
Between contacts of different polarity 

Between contacts of the same polarity 
1,000 VAC at 50/60 Hz for 1 min.  
Vibration resistance 
Destruction  10 to 55 to 10 Hz, 0.5mm single amplitude (1.0mm double amplitude)  
Malfunction  10 to 55 to 10 Hz, 0.5mm single amplitude (1.0mm double amplitude)  
Shock resistance 
Destruction  1,000 m/s2  
Malfunction  200 m/s2  
Endurance  Mechanical  AC: 50,000,000 operations min. DC: 100,000,000 operations min. (switching frequency: 18,000 operations/h) 

Electrical *4  1, 3, 4pole: 200,000 operations min. 2pole: 500,000 operations min. (rated load, operating frequency: 1,800 operations/h) 
2pole: 500,000 operations min. (rated load, operating frequency: 1,800 operations/h) 

Failure rate P value (reference value) *5 
100 mA at 5 VDC  10mA at 5 VDC  
Weight  1pole and 2pole: 40 g, 3pole: Approx. 50 g, 4pole: Approx. 70 g 
*1. Measurement conditions: 1 A at 5 VDC using the voltage drop method
*2. Measurement conditions: With rated operating power applied, not including contact bounce.
Ambient temperature condition: 23° C
*3. Measurement conditions: For 500 VDC applied to the same location as for dielectric strength measurement.
*4. Ambient temperature condition: 23° C
*5. This value was measured at a switching frequency of 120 operations per minute.
Endurance Under Real Loads (Reference Only)
Item  LY1, 100 VAC  LY2, 100 VAC  
Load type  Conditions  Operating frequency 
Electrical life (×10,000 operations min.) 
Conditions  Operating frequency 
Electrical life (×10,000 operations min.) 

AC motor  400 W, 100 VAC singlephase with 35A inrush current, 7A current flow 
ON for 10 s, OFF for 50 s 
5  200 W, 100 VAC singlephase with 25A inrush current, 5A current flow 
ON for 10 s, OFF for 50 s 
20  
AC lamp  300 W, 100 VAC with 51A inrush current, 3A current flow 
ON for 5 s, OFF for 55 s 
10  300 W, 100 VAC with 51A inrush current, 3A current flow 
ON for 5 s, OFF for 55 s 
8  
500 W, 100 VAC with 78A inrush current, 5A current flow 
2.5  
Capacitor (2,000 μF) 
24 VDC with 50A inrush current, 1A current flow 
ON for 1 s, OFF for 6 s 
10  24 VDC with 50A inrush current, 1A current flow 
ON for 1 s, OFF for 15 s 
1  
24 VDC with 20A inrush current, 1A current flow 
15  
AC solenoid  50 VA with 2.5A inrush current, 0.25A current flow 
ON for 1 s, OFF for 2 s 
150  50 VA with 2.5A inrush current, 0.25A current flow 
ON for 1 s, OFF for 2 s 
100  
100 VA with 5A inrush current, 0.5A current flow 
80  100 VA with 5A inrush current, 0.5A current flow 
50  
Item  LY4, 100 VAC  
Load type  Conditions  Operating frequency  Electrical life (×10,000 operations min.) 

AC motor  200 W, 200 VAC threephase with 5A inrush current, 1A current flow 
ON for 10 s, OFF for 50 s 
50  
750 W, 200 VAC threephase with 18A inrush current, 3.5A current flow 
7  
AC lamp  300 W, 100 VAC with 51A inrush current, 3A current flow 
ON for 5 s, OFF for 55 s 
5  
Capacitor (2,000 μF) 
24 VDC with 50A inrush current, 1A current flow 
ON for 1 s, OFF for 15 s 
0.5  
24 VDC with 20A inrush current, 1A current flow 
ON for 1 s, OFF for 2 s 
20  
AC solenoid  50 VA with 2.5A inrush current, 0.25A current flow 
ON for 1 s, OFF for 2 s 
100  
100 VA with 5A inrush current, 0.5A current flow 
50 
Solder terminals
LY1
LY1N
LY1D
LY1ND2
LY2, LY2D
LY2Z, LY2ZD
LY2N, LY2ND2
LY2ZN, LY2ZND2
LY3
LY3N
LY3D
LY4
LY4N
LY4D
LY4ND2
LY2CR
LY2ZCR
LY2NCR
LY2ZNCR
* These dimensions are for the LY2NCR.
Relays with PCB Terminals
LY10, LY30, LY20, and LY40
Note: The dimensions depicted here are for the LY20.
The dimension with an asterisk (*) is 6.4 for the LY10.
Casesurface mounting
LY1F
LY2F
Note: The dimensions depicted here are for the LY1F. The LY2F is also conforms to these measurements.