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0813 8742 8586
0878 7959 5522
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Feature :
Equipped with arc barrier.
Dielectric strength: 2,000 V.
Builtin diode models added to the LY Series.
Singlepole and doublepole models are applicable to operating coils with ratings of 100 ⁄ 110 VAC, 110 ⁄ 120 VAC, 200 ⁄ 220 VAC, 220 ⁄ 240 VAC, or 100 ⁄ 110 VDC.
Threepole and fourpole models are applicable to operating coils with ratings of 100 ⁄ 110 VAC, 200 ⁄ 220 VAC, or 100 ⁄ 110 VDC.
Coil Rating
Single and Doublepole Relays
Rated voltage 
Rated current  Coil Resistance 
Coil Induction (reference value) 
Must operate voltage 
Must release voltage 
Max. voltage 
Power Consumption (approx.) 

50 Hz  60 Hz  Arm. OFF  Arm. ON  % of rated voltage  
AC  6 V  214.1 mA  183 mA  12.2 Ω  0.04 H  0.08 H  80% max.  80% max.  110%  1.0 to 1.2 VA (60 Hz) 
12 V  106.5 mA  91 mA  46 Ω  0.17 H  0.33 H  
24 V  53.8 mA  46 mA  180Ω  0.69 H  1.30 H  
50 V  25.7 mA  22 mA  788ΩW  3.22 H  5.66 H  
100/ 110 V 
11.7/ 12.9 mA 
10/ 11 mA 
3,750 Ω  14.54 H  24.6 H  0.9 to 1 VA (60 Hz) 

110/ 120 V 
9.9/ 10.8 mA 
8.4/ 9.2 mA 
4,430 Ω  19.20 H  32.1 H  
200/ 220 V 
6.2/ 6.8 mA 
5.3/ 5.8 mA 
12,950 Ω  54.75 H  94.07 H  
220/ 240 V 
4.8/ 5.3 mA 
4.2/ 4.6 mA 
18,790 Ω  83.50 H  136.40 H  
DC  6 V  150 mA  40 Ω  0.16 H  0.33 H  10% min.  0.9 W  
12 V  75 mA  160 Ω  0.73 H  1.37 H  
24 V  36.9 mA  650 Ω  3.20 H  5.72 H  
48 V  18.5 mA  2,600 Ω  10.6 H  21.0 H  
100/ 110 V 
9.1/ 10 mA 
11,000 Ω  45.6 H  86.2 H 
Note:
1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15% ⁄ 20% for rated currents and ±15% for DC coil resistance.
2. Performance characteristic data are measured at a coil temperature of 23°C.
3. AC coil resistance and impedance are provided as reference values (at 60 Hz).
4. Power consumption drop was measured for the above data. When driving transistors, check leakage current and connect a bleeder resistor if required.
Threepole Relays
Rated voltage 
Rated current  Coil Resistance 
Coil Induction (reference value) 
Must operate voltage 
Must release voltage 
Max. voltage 
Power consumption (approx.) 

50 Hz  60 Hz  Arm. OFF  Arm. ON  % of rated voltage  
AC  6 V  310 mA  270 mA  6.7 Ω  0.03 H  0.05 H  80% max.  30% min.  110%  1.6 to 2.0 VA (60 Hz) 
12 V  159 mA  134 mA  24 Ω  0.12 H  0.21 H  
24 V  80 mA  67 mA  100 Ω  0.44 H  0.79 H  
50 V  38 mA  33 mA  410 Ω  2.24 H  3.87 H  
100/ 110 V 
14.1/ 16 mA 
12.4/ 13.7 mA 
2,300 Ω  10.5 H  18.5 H  
200/ 220 V 
9.0/ 10.0 mA 
7.7/ 8.5 mA 
8,650 Ω  34.8 H  59.5 H  
DC  6 V  234 mA  25.7 Ω  0.11 H  0.21 H  10% min.  1.4 W  
12 V  112 mA  107 Ω  0.45 H  0.98 H  
24 V  58.6 mA  410 Ω  1.89 H  3.87 H  
48 V  28.2 mA  1,700 Ω  8.53 H  13.9 H  
100 /110 V 
12.7/13 mA  8,500 Ω  29.6 H  54.3 H 
Note:
1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15 % ⁄ 20% for rated currents and ±15% for DC coil resistance.
2. Performance characteristic data are measured at a coil temperature of 23°C.
3. AC coil resistance and impedance are provided as reference values (at 60 Hz).
4. Power consumption drop was measured for the above data. When driving transistors, check leakage current and connect a bleeder resistor if required.
Fourpole Relays
Rated voltage 
Rated current  Coil Resistance 
Coil Induction (reference value) 
Must operate voltage 
Must release voltage 
Max. voltage 
Power consumption (approx.) 

50 Hz  60 Hz  Arm. OFF  Arm. ON  % of rated voltage  
AC  6 V  386 mA  330 mA  5 Ω  0.02 H  0.04 H  80% max.  30% min.  110%  1.95 to 2.5 VA (60 Hz) 
12 V  199 mA  170 mA  20 Ω  0.10 H  0.17 H  
24 V  93.6 mA  80 mA  78 Ω  0.38 H  0.67 H  
50 V  46.8 mA  40 mA  350 Ω  1.74 H  2.88 H  
100/ 110 V 
22.5/ 25.5 mA 
19/ 21.8 mA 
1,600 Ω  10.5 H  17.3 H  
200/ 220 V 
11.5/ 13.1 mA 
9.8/ 11.2 mA 
6,700 Ω  33.1 H  57.9 H  
DC  6 V  240 mA  25 Ω  0.09 H  0.21 H  10% min.  1.5 W  
12 V  120 mA  100 Ω  0.39 H  0.84 H  
24 V  69 mA  350 Ω  1.41 H  2.91 H  
48 V  30 mA  1,600 Ω  6.39 H  13.6 H  
100/ 110 V 
15/15.9 mA  6,900 Ω  32 H  63.7 H 
Note:
1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15% ⁄ 20% for rated currents and ±15% for DC coil resistance.
2. Performance characteristic data are measured at a coil temperature of 23°C.
3. AC coil resistance and impedance are provided as reference values (at 60 Hz).
4. Power consumption drop was measured for the above data. When driving transistors, check leakage current and connect a bleeder resistor if required.
Contact Rating
Relay  Single Contact  Bifurcated contacts  
1pole  2, 3 or 4pole  2pole  
Load  Resistive load (cosΦ = 1) 
Inductive load (cosΦ = 0.4, L/R = 7 ms) 
Resistive load (cosΦ = 1) 
Inductive load (cosΦ = 0.4, L/R = 7 ms) 
Resistive load (cosΦ = 1) 
Inductive load (cosΦ = 0.4, L/R = 7 ms) 
Rated Load  110 VAC 15 A 24 VDC 15 A 
110 VAC 10 A 24 VDC 7 A 
110 VAC 10 A 24 VDC 10 A 
110 VAC 7.5 A 24 VDC 5 A 
110 VAC 5A 24 VDC 5 A 
110 VAC 4 A 24 VDC 4A 
Rated Carry Current 
15 A  10A  7A  
Max. switching voltage 
250 VAC 125 VDC 
250 VAC 125 VDC 
250 VAC 125 VDC 

Max. switching current 
15 A  10A  7A  
Max. switching power 
1,700 VA 360 W 
1,100 VA 170 W 
1,100 VA 240 W 
825 VA 120 W 
550 VA 120 W 
440 VA 100 W 
Failure rate (reference value)* 
100 mA, 5 VDC  100 mA, 5 VDC  100 mA, 5 VDC 
*Note: P level: λ60 = 0.1 x 106⁄operation
Characteristics
Item  All except Relays with bifurcated contacts  Relays with bifurcated contacts 
Contact resistance  50 mΩ max.  
Operate time  25 ms max.  
Release time  25 ms max.  
Max. operating frequency  Mechanical: 18,000 operations/hr Electrical: 1,800 operations/hr (under rated load) 

Insulation resistance  100 MΩ min. (at 500 VDC)  
Dielectric strength  1,000 VAC, 50/60 Hz for 1 min between contacts of same polarity 2,000 VAC, 50/60 Hz for 1 min between contacts of different polarity 

Vibration resistance  Destruction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude) Malfunction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude) 

Shock resistance  Destruction: 1,000 m/s2 Malfunction: 200 m/s2 

Endurance  Mechanical: AC: 50,000,000 operations min. (at 18,000 operations/hr) DC: 1,00,000,000 operations min. (at 18,000 operations/hr) Electrical: Single, three, and fourpole: 200,000 operations min. (at 1,800 operations/hr under rated load) Doublepole: 500,000 operations min. (at 1,800 operations/hr under rated load) 

Ambient temperature*  Operating: Single and doublepole standard, bifurcatedcontact Relays: 25°C to 55°C (with no icing) (25°C to 70°C if carry current is 4 A or less) All other Relays: 25°C to 40°C (with no icing) (25°C to 55°C if carry current is 4 A or less) 

Ambient humidity  Operating: 5% to 85%  
Weight  Single and doublepole: approx. 40 g, threepole: approx. 50 g, fourpole: approx. 70 g 
Note:
1. The values given above are initial values
2. The upper limit of 40°C for some Relays is because of the relationship between diode junction temperature and the element used.
Endurance Under Real Loads (reference only)
LY1
Rated voltage  Load type  Conditions  Operating frequency  Electrical life 
100 VAC  AC motor  400 W, 100 VAC singlephase with 35A inrush current, 7A current flow 
ON for 10 s, OFF for 50 s  50,000 operations 
AC lamp  300 W, 100 VAC with 51A inrush current, 3A current flow 
ON for 5 s, OFF for 55 s  100,000 operations  
500 W, 100 VAC with 78A inrush current, 5A current flow 
25,000 operations  
Capacitor (2,000 μF) 
24 VDC with 50A inrush 1A current flow 
ON for 1 s, OFF for 6 s  100,000 operations  
AC solenoid  50 VA with 2.5A inrush current, 0.25A current flow 
ON for 1 s, OFF for 2 s  1,500,000 operations  
100 VA with 5A inrush current, 0.5A current flow 
800,000 operations 
LY2
Rated voltage  Load type  Conditions  Operating frequency  Electrical life 
100 VAC  AC motor  200 W, 100 VAC singlephase with 25A inrush current, 5A current flow 
ON for 10 s, OFF for 50 s  200,000 operations 
AC lamp  300 W, 100 VAC with 51A inrush current, 3A current flow 
ON for 5 s, OFF for 55 s  80,000 operations  
Capacitor (2,000 μF) 
24 VDC with 50A inrush current, 1A current flow 
ON for 1 s, OFF for 15 s  10,000 operations  
24 VDC with 20A inrush current, 1A current flow 
150,000 operations  
AC solenoid  50 VA with 2.5A inrush current, 0.25A current flow 
ON for 1 s, OFF for 2 s  1,000,000 operations  
100 VA with 5A inrush current, 0.5A current flow 
500,000 operations 
LY4
Rated voltage  Load type  Conditions  Operating frequency  Electrical life 
100 VAC  AC motor  200 W, 200 VAC triplephase with 5A inrush current, 1A current flow 
ON for 10 s, OFF for 50 s  500,000 operations 
750 W, 200 VAC triplephase with 18A inrush current, 3.5 A current flow 
70,000 operations  
AC lamp  300 W, 100 VAC with 51A inrush current, 3A current flow 
ON for 5 s, OFF for 55 s  50,000 operations  
Capacitor (2,000 μF) 
24 VDC with 50A inrush current, 1A current flow 
ON for 1 s, OFF for 15 s  5,000 operations  
24 VDC with 20A inrush current, 1A current flow 
ON for 1 s, OFF for 2 s  200,000 operations  
AC solenoid  50 VA with 2.5A inrush current, 0.25A current flow 
ON for 1 s, OFF for 2 s  1,000,000 operations  
100 VA with 5A inrush current, 0.5A current flow 
500,000 operations 