Industrial Automation

LY

Bi-power Relays

Power-switching Compact General-purpose Relays

last update: November 18, 2024

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				Approx. 1.0 to 1.2 (at 60 Hz)
	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 250 VAC	10 A at 110 VAC 7 A at 24 VDC	10 A at 110 VAC 10 A at 24 VDC	10 A at 250 VAC	7.5 A at 110 VAC 5 A at 24 VDC 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
*Electrical endurance1**	200,000 operations min.	200,000 operations min.	200,000 operations min.	3-, 4-pole: 200,000 operations min. 2-pole: 500,000 operations min.	50,000 operations min.	3-, 4-pole: 200,000 operations min. 2-pole: 500,000 operations min.	2-pole: 500,000 operations min.
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			10 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) *2	-25 to +40°C (with no icing or condensation) *3
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 Ambient Temperature vs. Coil Temperature Rise in Engineering 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 the PTF-08-PU or
PTF-08-PU-L, connect each of the following terminal pairs: terminal No.12 (1) to 42 (4), 14 (5) to 44 (8), and
11 (9) to 41 (12).
When you apply a minimum of 10 A of current to an LY1 when it is used in combination with the PTF08A,
PTFZ-08-E, or PT08, connect each of the following terminal pairs: (1) to (2), (3) to (4), and (5) to (6).
*1. Ambient temperature condition: 23° C
　　Rated load, operating frequency: 1,800 operations/h
*2. If the carry current is 4 A or less, the usable ambient temperature range is -25 to 70° C.
*3. 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)
Failure rate P value (reference value) *4		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. 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

Details on Safety-standard-certified Models, LY[]

• Standard models are certified for the UL and CSA safety standards.
• Refer to Model Number Structure on Lineup for a list of applicable models.
• The rated values for safety standard certification are not the same as individually defined performance values. Always check the specifications before use.

UL-certified Models (File No. E41643)

Model	Coil ratings	Number of poles	Contact ratings	Certified number of operations
LY	6 to 240VAC 6 to 125VDC	1	15A, 120VAC (General use)	100,000 operations
			15A, 240VAC (General use)	6,000 operations
			15A, 30VDC (Resistive)	6,000 operations
			1/2HP, 120VAC	100,000 operations
			8.5FLA, 30LRA, 120VAC	100,000 operations
			TV-5, 120VAC	25,000 operations
			470VA, Pilot duty, 120VAC	6,000 operations
	6 to 240VAC 6 to 125VDC	2	15A, 120VAC (General use)	100,000 operations
			12A, 240VAC (General use)	6,000 operations
			7A, 250VAC (General use)
			15A, 30VDC (Resistive)
			5A, 38VDC (Resistive)
			1/2HP, 120VAC	100,000 operations
			1/3HP, 240VAC	1,000 operations
			8.5FLA, 30LRA, 120VAC	100,000 operations
			5FLA, 50LRA, 50VDC	100,000 operations
			TV-3, 120VAC	25,000 operations
			345VA, Pilot duty, 120-240VAC	6,000 operations
			B300/R300	6,000 operations
	6 to 240VAC 6 to 125VDC	3 4	10A, 240VAC (General use) (Same polarity)	6,000 operations
			10A, 30VDC (General use) (Same polarity)
			2A, 40VDC (Resistive) (Same polarity)
			1/2HP, 240VAC	1,000 operations
			0.6A, 100VDC (Resistive) (Same polarity)	6,000 operations

CSA-certified Models (File No. LR31928)

Model	Coil ratings	Number of poles	Contact ratings	Certified number of operations
LY	6 to 240VAC 6 to 125VDC	1	15A, 120VAC (General use)	100,000 operations
			15A, 240VAC (General use)	6,000 operations
			15A, 30VDC (Resistive)	6,000 operations
			1/2HP, 120VAC	100,000 operations
			8.5FLA, 30LRA, 120VAC	100,000 operations
			TV-5, 120VAC	25,000 operations
			470VA, Pilot duty, 120VAC	6,000 operations
	6 to 240VAC 6 to 125VDC	2	15A, 120VAC (General use)	6,000 operations
			12A, 240VAC (General use)
			7A, 250VAC (General use)
			15A, 30VDC (Resistive)
			5A, 38VDC (Resistive)
			1/2HP, 120VAC	100,000 operations
			1/3HP, 240VAC	1,000 operations
			8.5FLA, 30LRA, 120VAC	100,000 operations
			5FLA, 50LRA, 50VDC	100,000 operations
			TV-3, 120VAC	25,000 operations
			345VA, Pilot duty, 120-240VAC	6,000 operations
			B300/R300 Pilot duty	6,000 operations
	6 to 240VAC 6 to 125VDC	3 4	10A, 240VAC (General use) (Same polarity)	6,000 operations
			10A, 30VDC (Resistive) (Same polarity)	6,000 operations
			1/8HP, 240VAC (Same polarity)	1,000 operations
			1/2HP, 240VAC (Same polarity)
			1/3HP, 240VAC (Same polarity)
			2A, 40VDC (Resistive)	6,000 operations
			0.6A, 100VDC (Resistive)	6,000 operations

TÜV-certified Models (File No. R50030064, EN 61810-1)

Model	Coil ratings	Number of poles	Contact ratings	Certified number of operations
LY[]	6 to 240 VAC 6 to 110 VDC	1	15 A, 110 VAC resistive load	200,000 operations
			10 A, 110 VAC inductive load
			10 A, 250 VAC resistive load
			7A, 250 VAC inductive load
			10 A, 30 VDC resistive load
			7 A, 30 VDC inductive load
	6 to 240 VAC 6 to 125 VDC	2	10 A, 250 VAC resistive load	50,000 operations
			10 A, 110 VAC resistive load	200,000 operations
			7.5A, 110 VAC inductive load
			7A, 250 VAC resistive load
			4 A, 250 VAC inductive load
			7 A, 30 VDC resistive load
			4 A, 30 VDC inductive load
	6 to 240 VAC 6 to 110 VDC	3	10 A, 250 VAC resistive load	50,000 operations
			10 A, 110 VAC resistive load	100,000 operations
			7.5A, 110 VAC inductive load	100,000 operations
	6 to 240 VAC 6 to 125 VDC	4	10 A, 250 VAC resistive load	50,000 operations
			10 A, 110 VAC resistive load	100,000 operations
			7.5A, 110 VAC inductive load	100,000 operations

• When ordering a model that is certified for VDE or Lloyd’s Register (LR) standards, always specify “VDE-certified Model” or “LR Standard-certified Model” with your order.

VDE Certification (Certificate No. 6359, EN 61810-1)

Model	Coil ratings	Number of poles	Contact ratings	Certified number of operations
LY[]-VD	6, 12, 24, 50, 110, or 220 VAC 6, 12, 24, 48, or 110 VDC	1	10 A, 220 VAC resistive load	200,000 operations
			7 A, 220 VAC inductive load
			10 A, 28 VDC resistive load
			7 A, 28 VDC inductive load
		2	7 A, 220 VAC resistive load
			4 A, 220 VAC inductive load
			7 A, 28 VDC resistive load
			4 A, 28 VDC inductive load

LR-certified Models (File No. 00/10047)

Model	Coil ratings	Number of poles	Contact ratings
LY[]	6 to 240 VAC 6 to 110 VDC	2	7.5 A, 230 VAC inductive load
LY[]	6 to 240 VAC 6 to 110 VDC	4	5 A, 24 VDC inductive load

Details on Safety-standard-certified Models, Sockets

UL-certified Models (File No. E87929)

Model	Ratings	Listed/Recognized
PTF-08-PU	10A 250V	Recognized
PTF-14-PU	10A 250V (Same polarity)
PTFZ-08-E	15A 250V (at 50 deg) 12A 250V (at 70 deg)
PTFZ-14-E	15A 250V (at 50 deg) 12A 250V (at 70 deg)
PTF08A PT08	15A 250V
PTF11A PTF14A PT11 PT14	10A 250V

CSA-certified Models (File No. LR31928)

Model	Ratings	Class number
PTF-08-PU	10A 250V	3211 07
PTF-14-PU	10A 250V (Same polarity)
PTFZ-08-E	15A 250V (at 50 deg) 12A 250V (at 70 deg)
PTFZ-14-E	15A 250V (at 50 deg) 12A 250V (at 70 deg)
PTF08A	15A 240V AC
PTF11A PTF14A	10A 240V AC

CE Marking Compliance

Model	EMC Directive	Low Voltage Directive	Machinery Directive	Safety Category
PTFZ-08-E	Not applicable	○	Not applicable	1
PTFZ-14-E
PTF-08-PU(-L)
PTF-14-PU(-L)

Note: 1. CE compliance is achieved when used with a relay (LY).
2. The Safety Category refers to the maximum applicable category selected when constructing control system safety
components. The category does not apply to individual components.

TÜV Rheinland certification

Model	Ratings	Standard number	Certification number
PTF-08-PU	10A 250V *1	EN 61984	R50327595
PTF-14-PU	10A 250V *2		R50327595
PTFZ-08-E	15A 250V (at 50 deg) 12A 250V (at 70 deg)		R50438680
PTFZ-14-E	15A 250V (at 50 deg) 12A 250V (at 70 deg)		R50438680

*1. Ratings are for an ambient temperature of 55°C. At an ambient temperature of 70°C, the value is 7A.
*2. Ratings are for an ambient temperature of 40°C. At an ambient temperature of 70°C, the value is 7A.

Compliance with Electrical Appliances and Material Safety Act, LY[]

All standard models comply with the Electrical Appliances and Material Safety Act.

Model	Coil ratings	Number of poles	Contact ratings
LY[]	6 to 240 VAC 6 to 120 VDC	1	15 A at 200 VAC
LY[]	6 to 240 VAC 6 to 120 VDC	2 3 4	10A at 200 VAC

Accessories (Order Separately)

Socket Characteristics

Model	Continuous carry current	Dielectric strength	Insulation resistance *1
PTF-[]-PU(L)	10 A	Between contact terminals of same polarity: 2,000 VAC, 1 min	1,000 MΩ min.
		Between contact terminals of different polarity: 2,000 VAC, 1 min
		Between coil and contact terminals: 2,000 VAC, 1 min
PTFZ-[][]-E	12 A (@70°C) 15 A (@50°C) *2	Between contact terminals of different polarity: 2,500 VAC, 1 min	1,000 MΩ min.
		Between contact terminals of same polarity: 2,500 VAC, 1 min
		Between ground terminals: 2,500 VAC, 1 min
		Between coil and contact terminals: 2,500 VAC, 1 min
PTF[][]A	10 A	Between terminals: 2,000 VAC for 1 min	100 MΩ min.
PT-[][]	10 A	Between terminals: 2,000 VAC for 1 min	100 MΩ min.
PT[][]-0	10 A	Between terminals: 2,000 VAC for 1 min	100 MΩ min.
PT[][]QN	10 A	Between terminals: 2,000 VAC for 1 min	100 MΩ min.

*1. The insulation resistance was measured with a 500-VDC insulation resistance meter at the same places as those used
for measuring the dielectric strength.
*2. However, do not exceed the continuous carry current of the socket to be mounted.

last update: November 18, 2024

Product Category

Relays
- General Purpose Relays
  - For Control Panel
    - G2RV-ST
    - MY-GS
    - MY
    - LY
    - G2R-[]-S (S)
    - G7T
    - MK-S
    - MM
    - MMK

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