G7Z

Category General Purpose Relays Tag Omron

• One pole carries 40 A. UL NO contacts (resistive 40 A 480 VAC, 60 Hz, 80,000 operations). EN 60947-4-1 NO contacts (AC1 40 A 440 VAC, 50/60 Hz, 80,000 operations).

• Ideal for supply power to industrial inverters, servo drivers, and other devices, and switching power to motors and other equipment.

• The maximum load capacity of 160 A when using 4-pole parallel connections.

• EN 60947-4-1 certification for mirror contact mechanism obtained by combining the Relay with an Auxiliary Contact Block.

• Conforms to European PV standard (VDE0126).

• Approx. 30% less operation noise than a standard electromagnetic contactor.* (Approx. 100 dB reduced to approx. 70 dB.)

• Approx. 50% the volume of a standard electromagnetic contactor* to help downsize control panels.

* According to OMRON investigation of IIEC-AC1 50 A specifications.

Ratings

Coil

Item	Rated current (mA)	Coil resistance (Ω)	Must operate voltage	Must release voltage	Maximum voltage	Power consumption (W)
Rated voltage	Rated current (mA)	Coil resistance (Ω)	Percentage of rated voltage			Power consumption (W)
12 VDC	308	39	75% max.	10% min.	110%	Approx. 3.7
24 VDC	154	156	75% max.	10% min.	110%	Approx. 3.7

Note: 1. Rated current and coil resistance were measured at a coil temperature of 23°C with coil resistance of ±15%.
2. Operating characteristics were measured at a coil temperature of 23°C.
3. The maximum allowable voltage is the maximum value of the fluctuation range for the Relay coil operating
power supply and was measured at an ambient temperature of 23°C.
There is, however, no continuous allowance.

Contacts

Relay, Relay with Auxiliary Contact Block

Model		G7Z-4A-[]Z-R, G7Z-3A1B-[]Z-R, G7Z-2A2B-[]Z-R
Load		Resistive load	Inductive load cosφ = 0.3	Resistive load L/R = 1 ms
Contact structure		Double break
Contact material		Ag alloy
Rated load	NO	40 A at 440 VAC	22 A at 440 VAC	5 A at 110 VDC
Rated load	NC	25 A at 440 VAC	10 A at 440 VAC	5 A at 110 VDC
Rated carry current	NO	40 A *
Rated carry current	NC	25 A
Maximum contact voltage		480 VAC		125 VDC
Maximum contact current	NO	40 A	22 A	5 A
Maximum contact current	NC	25 A	10 A	5 A
Maximum switching capacity	NO	17,600 VA	9,680 VA	550 W
Maximum switching capacity	NC	11,000 VA	4,400 VA	550 W
Failure rate P value (reference value)		2 A at 24 VDC

Note: The ratings for the auxiliary contact block mounted on the G7Z are the same as those for the G73Z auxiliary
contact block.
* Set of Relay and Auxiliary Contact Block: 45 to 60°C; for the continuous carry current, reduce 40 A by 0.7 A/°C.

Auxiliary Contact Block

Item	G73Z-20Z-R, G73Z-11Z-R, G73Z-02Z-R
Item	Resistive load	Inductive load cosφ = 0.3	Resistive load L/R = 1 ms
Contact structure	Single break
Contact material	Au clad + AgNi
Rated load	1 A at 440 VAC	0.5 A at 440 VAC	0.5 A at 110 VDC
Rated carry current	1A
Maximum contact voltage	480 VAC		125 VDC
Maximum contact current	1A	0.5 A
Maximum switching capacity	440 VA	220 VA	55 W
Failure rate P value (reference value)	1 mA at 1 VDC

Characteristics

Classification		*Relay with auxiliary contact block 5**	Auxiliary contact block
Model		G7Z-4A-[]Z-R, G7Z-3A1B-[]Z-R, G7Z-2A2B-[]Z-R	G73Z-20Z-R, G73Z-11Z-R, G73Z-02Z-R
*Contact resistance 1**		400 mΩ max.	100 mΩ max.
*Operating time 2**		50 ms max.
*Release time 2**		50 ms max.
Maximum operating frequency	Mechanical	1,800 operations/h
Maximum operating frequency	Rated load	1,200 operations/h
*Insulation resistance 3**		1,000 MΩ min.
Dielectric strength	Between coil and contacts	4,000 VAC, 50/60 Hz for 1 min	—
	Between contacts of different polarity	4,000 VAC, 50/60 Hz for 1 min
	Between contacts of the same polarity	2,000 VAC, 50/60 Hz for 1 min
Impulse withstand voltage	Between coil and contacts	10 kV, 1.2 × 50 μs	—
	Between contacts of different polarity	10 kV, 1.2 × 50 μs
	Between contacts of the same polarity	4.5 kV, 1.2 × 50 μs	3.0 kV, 1.2 × 50 μs
Vibration resistance	Destruction	10 to 55 to 10 Hz, 0.5-mm single amplitude (1.0-mm double amplitude)
Vibration resistance	Malfunction	NO: 10 to 55 to 10 Hz, 0.5-mm single amplitude (1.0-mm double amplitude) NC: 10 to 32 to 10 Hz, 0.5-mm single amplitude (1.0-mm double amplitude)
Shock resistance	Destruction	Screw mounting: 700 m/s², DIN Track mounting: 500 m/s²
Shock resistance	Malfunction	NO: 100 m/s² NC: 25 m/s²
Durability	Mechanical	1,000,000 operations min. (at 1,800 operations/h, contact no load)
Durability	*Electrical 4**	AC resistive load: 80,000 operations AC inductive load: 80,000 operations DC resistive load: 100,000 operations (at 1,200 operations/h, rated load)
Failure rate (P level) (reference value) *6		2 A at 24 VDC	1 mA at 1 VDC
Ambient operating temperature		-25 to 60°C (with no icing or condensation)
Ambient operating humidity		5% to 85%
Weight		Approx. 330 g	Approx. 18 g

Note: The above values are initial values.
*1. The contact resistance for the Relay (G7Z) was measured with 1 A at 5 VDC using the voltage drop method.
The contact resistance for the auxiliary contact block (G73Z) was measured with 0.1 A at 5 VDC using the voltage
drop method.
*2. The operate time was measured with the rated voltage imposed with any contact bounce ignored at the ambient
temperature of 23℃.
*3. The insulation resistance was measured with a 1,000-VDC megohmmeter applied to the same places as those used
for checking the dielectric strength.
*4. The electrical endurance was measured at an ambient temperature of 23℃.
*5. The specifications for the auxiliary contact block mounted on the G7Z are the same as those for the G73Z auxiliary
contact block.
*6. The failure rate is based on an operating frequency of 1,800 operations/h.

Approved Standards

UL Standard: (File No. E41643)

Classifi-cation	Con-tact Mecha-nism of Auxi-liary Con-tacts	Model	Num-ber of poles	Contact ratings			Number of test opera-tions	Coil ratings	Category	Listed/ Recog-nized
Relay with Auxiliary Contact Block	Single-break models	G7Z-4A-20Z-R G7Z-4A-11Z-R G7Z-4A-02Z-R G7Z-3A1B-20Z-R G7Z-3A1B-11Z-R G7Z-3A1B-02Z-R G7Z-2A2B-20Z-R G7Z-2A2B-11Z-R G7Z-2A2B-02Z-R	4 poles + 2 poles (Relay unit + auxi-liary con-tact)	NO contact	Relay	40 A, 480 VAC, 60 Hz (Resistive)	80,000	12, 24 VDC	NLDX2, NLDX8	Recog-nized
						5 A, 120 VDC (Resistive)	100,000
						22 A, 480 VAC, 60 Hz (General Use)	100,000
					Auxiliary Contact	D300 (1-A current applied)	—
				NC contact	Relay	25 A, 480 VAC, 60 Hz (Resistive) 5 A, 120 VDC (Resistive) 10 A, 480 VAC, 60 Hz (General Use)	100,000
				NC contact	Auxiliary Contact	D300 (1-A current applied)	—
Relay	—	G7Z-4A G7Z-3A1B G7Z-2A2B	4 poles (Relay)	NO contact	(Relay)	40 A, 480 VAC, 60 Hz (Resistive)	80,000	12, 24 VDC	NLDX2, NLDX8	Recog-nized
						5 A, 120 VDC (Resistive)	100,000
						22 A, 480 VAC, 60 Hz (General Use)	100,000
				NC contact		25 A, 480 VAC, 60 Hz (General Use)	100,000
						5 A, 120 VDC (Resistive)
						10 A, 480 VAC, 60 Hz (General Use)
Auxiliary Contact Block	Single-break models	G73Z-20Z-R G73Z-11Z-R G73Z-02Z-R	2 poles (Auxi-liary Con-tact Block)	NO contact	(Auxiliary Contact)	D300 (1-A current applied)	—	—	NLDX2, NLDX8	Recog-nized
Auxiliary Contact Block	Single-break models	G73Z-20Z-R G73Z-11Z-R G73Z-02Z-R	2 poles (Auxi-liary Con-tact Block)	NC contact	(Auxiliary Contact)	D300 (1-A current applied)	—	—	NLDX2, NLDX8	Recog-nized

CSA Standard: CSA Certification by cUL
EN Standard/TÜV Certification: EN 60947-4-1 (Certification No. R50079155)

Category	Contact Mechanism of Auxiliary Contacts	Model	Number of poles	Contact ratings
Relay with Auxiliary Contact Block	Single-break models	G7Z-4A-20Z-R G7Z-4A-11Z-R G7Z-4A-02Z-R G7Z-3A1B-20Z-R G7Z-3A1B-11Z-R G7Z-3A1B-02Z-R G7Z-2A2B-20Z-R G7Z-2A2B-11Z-R G7Z-2A2B-02Z-R	4 poles + 2 poles (Relay unit + auxiliary contact)	NO contact	Relay	AC-1: 40 A 440 V 50/60 Hz AC-3: 16 A 440 V 50/60 Hz DC-1: 5 A 110 V
				NO contact	Auxiliary Contact	AC-15: 0.3 A 440 V 50/60 Hz DC-13: 0.3 A 110 V
				NC contact	Relay	AC-1: 25 A 440 V 50/60 Hz DC-1: 5 A 110 V
				NC contact	Auxiliary Contact	AC-15: 0.3 A 440 V 50/60 Hz DC-13: 0.3 A 110 V
Relay	—	G7Z-4A G7Z-3A1B G7Z-2A2B	4 poles (Relay)	NO contact	(Relay)	AC-1: 40 A 440 V 50/60 Hz AC-3: 16 A 440 V 50/60 Hz DC-1: 5 A 110 V
Relay	—	G7Z-4A G7Z-3A1B G7Z-2A2B	4 poles (Relay)	NC contact	(Relay)	AC-1: 25 A 440 V 50/60 Hz DC-1: 5 A 110 V
Auxiliary Contact Block	Single-break models	G73Z-20Z-R G73Z-11Z-R G73Z-02Z-R	2 poles (Auxiliary Contact Block)	NO contact	(Auxiliary Contact)	AC-15: 0.3 A 440 V 50/60 Hz DC-13: 0.3 A 110 V
Auxiliary Contact Block	Single-break models	G73Z-20Z-R G73Z-11Z-R G73Z-02Z-R	2 poles (Auxiliary Contact Block)	NC contact	(Auxiliary Contact)	AC-15: 0.3 A 440 V 50/60 Hz DC-13: 0.3 A 110 V

CCC Certification

Classification	Contact Mechanism of Auxiliary Contacts	Model	Standard No.	Certification No.
Relay with Auxiliary Contact Block	Single-break models	G7Z-4A-20Z-R G7Z-4A-11Z-R G7Z-4A-02Z-R G7Z-3A1B-20Z-R G7Z-3A1B-11Z-R G7Z-3A1B-02Z-R G7Z-2A2B-20Z-R G7Z-2A2B-11Z-R G7Z-2A2B-02Z-R	GB/T 14048.4	2009010304361493
Relay	—	G7Z-4A G7Z-3A1B G7Z-2A2B	GB/T 14048.4	2009010304361493

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