Omron, G7Z Series

• One pole carries 40 A. UL 508 and UL 840 NC contacts (resistive 40 A 480 VAC, 60 Hz, 80,000 operations). EN 60947-4-1 NC 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.

High Capacity and High Insulation

Continuously apply 40 A at 440 VAC, or apply up to a maximum of 160 A by using 4-pole parallel connections for full power application.*
The Relays are highly insulated to support load switching of 40 A at 440 VAC.
* Always consult with your OMRON representative before using the maximum current of 160 A.

Compact Size

Downsizing of approximately 40% volume compared with contactors.*
Contributes to space savings in control panels.
* IEC-AC1 50-A specifications

DIN Track Mountable

Safety Function with Mirror Contacts

EN 60947-4-1 certification for mirror contact mechanisms has been obtained by using a combination of a relay and auxiliary contact blocks (5 VDC, 1 mA), enabling application in feedback circuits of safety circuits.

Low Noise and Low Power Consumption

Low noise of approx. 70 dB compared with the approx. 100 dB for contactors.*
Low power consumption of less than 4 W DC. Environmentally friendly specifications.
* IEC-AC1 50-A specifications

Saving Space and Energy (Applications)

last update: December 06, 2012

Ratings

Coil Ratings

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.

Contact Ratings

Relay

Model		G7Z-4A-[]Z, G7Z-3A1B-[]Z, G7Z-2A2B-[]Z
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

Model	G73Z-20Z, G73Z-11Z, G73Z-02Z
Load	Resistive load	Inductive load cosΦ = 0.3	Resistive load L/R = 1 ms
Contact structure	Double break
Contact material	Au clad + Ag
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 5 VDC

Characteristics

Classification		*Relay 5**	Auxiliary contact block
Model		G7Z-4A-[]Z, G7Z-3A1B-[]Z, G7Z-2A2B-[]Z	G73Z-20Z, G73Z-11Z, G73Z-02Z
*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
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 5 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.

last update: December 06, 2012

Relay (12 VDC, 24 VDC) with Auxiliary Contact Block
4 Poles

Note: The dimensions are typical values.

Relay (12 VDC, 24 VDC)
4 Poles

Note: The dimensions are typical values.

Contact Block

Note: The dimensions are typical values.

Auxiliary DIN Track Mounting Height
(when using the PFP-100N or PFP-50N mounting rail)

Note: The dimensions are typical values.

TITLE	DOCUMENT TYPE	SIZE
G7Z	Catalog	2520 KB
Relay Defects Causes & Solutions (General-purpose Relay Edition)	Technical Guide	4100 KB