Omron, LY Series

• The standard models include models that are compliant with the UL, CSA, and SEV safety standards and with the Electrical Appliances and Material Safety Act.

• Equipped with an arc barrier for arc interruption.

• Withstand voltages up to 2,000 V.

• New built-in diode and built-in CR circuit models have joined the series.

• The lineup also includes models that are compliant with the LR and VDE safety standards.

• Single-pole and double-pole models have AC4 ratings and DC2 ratings (operating coil ratings: 100/110 VAC, 110/120 VAC, 200/220 VAC, 220/240 VAC, and 100/110 VDC).

• Three-pole and four-pole models have AC4 ratings and DC2 ratings (operating coil ratings: 100/110 VAC, 200/220 VAC and 100/110 VDC).

Ratings

Standard Models with Built-in Operation Indicators

Operating Coil, Single-pole and Double-pole 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	Coil resist- ance (Ω)	Armature OFF	Armature ON	Must- operate voltage (V)	Must- release voltage (V)	Maximum voltage (V)	Power con- sumption (VA, W)
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	Coil resist- ance (Ω)	Armature OFF	Armature ON	Must- operate voltage (V)	Must- release voltage (V)	Maximum voltage (V)	Power con- sumption (VA, W)
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	Coil resist- ance (Ω)	Armature OFF	Armature ON	Must- operate voltage (V)	Must- release voltage (V)	Maximum voltage (V)	Power con- sumption (VA, W)
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

Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/
-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 4-pole 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	Single-pole and double-pole models (standard models and bifurcated contact models)	Single-pole, double-pole models (models with built-in operation indicators, models with built-in diodes, and models with built-in CR circuits), 3-pole and 4-pole 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%

Note: 1. Some models in the LY1 and LY2 Series have an upper temperature limit of +40°C. This limitation is due to the
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,
PTF08A-E, 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 built-in operation indicators, models with built-in CR circuits, and models with built-in 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
Maximum operating frequency	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	2,000 VAC at 50/60 Hz for 1 min.
	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, 0.5-mm single amplitude (1.0-mm double amplitude)
Vibration resistance	Malfunction	10 to 55 to 10 Hz, 0.5-mm single amplitude (1.0-mm double amplitude)
Shock resistance	Destruction	1,000 m/s²
Shock resistance	Malfunction	200 m/s²
Endurance	Mechanical	AC: 50,000,000 operations min. DC: 100,000,000 operations min. (switching frequency: 18,000 operations/h)
Endurance	*Electrical 4**	1-, 3-, 4-pole: 200,000 operations min. 2-pole: 500,000 operations min. (rated load, operating frequency: 1,800 operations/h)	2-pole: 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		1-pole and 2-pole: 40 g, 3-pole: Approx. 50 g, 4-pole: Approx. 70 g

Note: The values at the left are initial values.
*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 single-phase with 35-A inrush current, 7-A current flow	ON for 10 s, OFF for 50 s	5	200 W, 100 VAC single-phase with 25-A inrush current, 5-A current flow	ON for 10 s, OFF for 50 s	20
AC lamp	300 W, 100 VAC with 51-A inrush current, 3-A current flow	ON for 5 s, OFF for 55 s	10	300 W, 100 VAC with 51-A inrush current, 3-A current flow	ON for 5 s, OFF for 55 s	8
AC lamp	500 W, 100 VAC with 78-A inrush current, 5-A current flow	ON for 5 s, OFF for 55 s	2.5	300 W, 100 VAC with 51-A inrush current, 3-A current flow	ON for 5 s, OFF for 55 s	8
Capacitor (2,000 μF)	24 VDC with 50-A inrush current, 1-A current flow	ON for 1 s, OFF for 6 s	10	24 VDC with 50-A inrush current, 1-A current flow	ON for 1 s, OFF for 15 s	1
Capacitor (2,000 μF)	24 VDC with 50-A inrush current, 1-A current flow	ON for 1 s, OFF for 6 s	10	24 VDC with 20-A inrush current, 1-A current flow	ON for 1 s, OFF for 15 s	15
AC solenoid	50 VA with 2.5-A inrush current, 0.25-A current flow	ON for 1 s, OFF for 2 s	150	50 VA with 2.5-A inrush current, 0.25-A current flow	ON for 1 s, OFF for 2 s	100
AC solenoid	100 VA with 5-A inrush current, 0.5-A current flow	ON for 1 s, OFF for 2 s	80	100 VA with 5-A inrush current, 0.5-A current flow	ON for 1 s, OFF for 2 s	50

Item	LY4, 100 VAC
Load type	Conditions	Operating frequency	Electrical life (×10,000 operations min.)
AC motor	200 W, 200 VAC three-phase with 5-A inrush current, 1-A current flow	ON for 10 s, OFF for 50 s	50
AC motor	750 W, 200 VAC three-phase with 18-A inrush current, 3.5-A current flow	ON for 10 s, OFF for 50 s	7
AC lamp	300 W, 100 VAC with 51-A inrush current, 3-A current flow	ON for 5 s, OFF for 55 s	5
Capacitor (2,000 μF)	24 VDC with 50-A inrush current, 1-A current flow	ON for 1 s, OFF for 15 s	0.5
Capacitor (2,000 μF)	24 VDC with 20-A inrush current, 1-A current flow	ON for 1 s, OFF for 2 s	20
AC solenoid	50 VA with 2.5-A inrush current, 0.25-A current flow	ON for 1 s, OFF for 2 s	100
AC solenoid	100 VA with 5-A inrush current, 0.5-A current flow	ON for 1 s, OFF for 2 s	50

(Unit: mm)

Solder terminals

LY1
LY1N
LY1-D
LY1N-D2

LY2, LY2-D
LY2Z, LY2Z-D
LY2N, LY2N-D2
LY2ZN, LY2ZN-D2

LY3
LY3N
LY3-D
LY3N-D2

LY4
LY4N
LY4-D
LY4N-D2

LY2-CR
LY2Z-CR
LY2N-CR
LY2ZN-CR

* These dimensions are for the LY2N-CR.

Relays with PCB Terminals

LY1-0, LY3-0, LY2-0, and LY4-0

Note: The dimensions depicted here are for the LY2-0.
The dimension with an asterisk (*) is 6.4 for the LY1-0.

Case-surface mounting

LY1F
LY2F

Note: The dimensions depicted here are for the LY1F. The LY2F is also conforms to these measurements.

LY3F

LY4F

Connection Sockets

PTF08A

PTF08A-E (Finger Protection Structure)

Mounting Hole Dimensions

PTF11A

Mounting Hole Dimensions

PTF14A

PTF14A-E (Finger Protection Structure)

Mounting Hole Dimensions

Note: If you use the PTF08A, PTF08A-E, or PT08 with an LY1 Relay, connect the following terminal pairs: 1-2, 3-4, and 5-6 (for usage at 10 A or higher).