Omron G7Z DATASHEET

New Product News

Power Relays

G7Z

High-capacity Power Relays Capable
of Carrying and Switching 40 A at 440 VAC

High

Compact

High

Insulation

Load switching for

400-VAC systems

Low

Noise

Approx. 70 dB

40%

smaller than

contactors (IEC-

AC1, 50-A

specifications)

Low Power

Consumption

Less than 4 W DC

Capacity

IEC-AC1 40-A rating

4-pole power fully applied:

160 A

RoHS

Compliant

Mirror Contacts

for

Safety Function

Simple

Mounting

High-capacity Power Relays
for Use in Contactor Current Ranges

G7Z

Customers want to use contactors with greater ease for
AC 1 class (IEC load) switching, and the G7Z Power
Relays were developed to meet those needs. As the
No.1 leader in production performance in Relays,
OMRON has implemented crossover technologies for the
new design of the G7Z.
Along with providing switching in the conventional
contactor range of 40 A with the size
and convenience of a conventional relay,
we have also achieved an ecological
relay-the user-friendly, high-capacity G7Z.

Number of poles

45 mm

62 mm

84 mm

60 mm

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

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.

G7Z

4 poles

3 poles
2 poles

1 pole

Up to 20 A 25 A 30 A 40 A

G7J

Expansion of relay range

Conventional usage division

Contactor
current
range

Current capacity

Application Example: General Safety Circuit

G9SA-301 (24-V AC/DC) (two limit switch input channels with manual reset)

Feedback loop

Open

TH

SA

Control

circuit

Feedback circuit

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

DIN Track Mountable

The Relay can be easily mounted right on a DIN Track.

Power Relays Contactors

Power Relays

G7Z

Multi-pole Power Relay fo r Contactor Current
Range Capable of Carrying and Switching
40 A at 440 VAC

• One pole, 40 A can be carried and switched.

• The maximum load capa city of 160 A when usi ng 4-pole parallel
connections.

• All materials used are compliant with the RoHS Directive

• EN 60947-4-1 certification for mirror contact mechanisms has
been obtained b y us ing a co mbin ation of t he rela y and auxi liary
contact blocks.

Note: Refer to the Precautions for Correct Use on page 9.

Model Number Structure

■Model Number Legend

Relay with Auxiliary Contact Block

G7Z-@-@@

123

1. Relay Contact Configuration

4A: 4PST-NO
3A1B: 3PST-NO/SPST-NC
2A2B: DPST-NO/DPST-NC

2. Co ntact Configuration of Auxiliary Contacts

20: DPST-NO
11: SPST-NO/SPST-NC
02: DPST-NC

3. Contact Mechanism of Auxiliary Contacts

Z: Bifurcated crossbar contact

Auxiliary Contact Block

G73Z-@@

1 2

1. Co ntact Configuratio n of Auxiliary Contacts

20: DPST-NO
11: SPST-NO/SPST-NC
02: DPST-NC

2. Co ntact Mechanism of Auxiliary Contacts

Z: Bifurcated crossbar contact

■Configuration

Structure Contact configuratio n Screw terminals

Classification Relay Auxiliary Contact

Relay with Auxilia ry
Contact Block

Auxiliary Contact Block 2 poles --- DPST-NO G73Z-20Z

Note: 1. Relay contact terminals are M5, and the coil terminals are M3.5.

2. Auxiliary contact block terminals are M3.5.

4 poles +
2 poles

4PST-NO DPST-NO G7Z-4A-20Z

3PST-NO/SPST-NC DPST-NO G7Z-3A1B-20Z

DPST-NO/DPST-NC DPST-NO G7Z-2A2B-20Z

Block

SPST-NO/SPST-NC G7Z-4A-11Z
DPST-NC G7Z-4A-02Z

SPST-NO/SPST-NC G7Z-3A1B-11Z
DPST-NC G7Z-3A1B-02Z

SPST-NO/SPST-NC G7Z-2A2B-11Z
DPST-NC G7Z-2A2B-02Z

SPST-NO/SPST-NC G73Z-11Z
DPST-NC G73Z-02Z

4 Power Relays G7Z

Ordering Information

■Relay with Auxiliary Contact

Block

Relay with Auxiliary Contact Block
(for Screw Terminals)

Contact configuratio n Rated voltage Model

Relay Auxiliary contact

4PST-NO DPST-NO 12, 24 VDC G7Z-4A-20Z

3PST-NO/
SPST-NC

DPST-NO/
DPST-NC

block

SPST-NO/SPST-NC 12, 24 VDC G7Z-4A-11Z
DPST-NC 12, 24 VDC G7Z-4A-02Z
DPST-NO 12, 24 VDC G7Z-3A1B-20Z
SPST-NO/SPST-NC 12, 24 VDC G7Z-3A1B-11Z
DPST-NC 12, 24 VDC G7Z-3A1B-02Z
DPST-NO 12, 24 VDC G7Z-2A2B-20Z
SPST-NO/SPST-NC 12, 24 VDC G7Z-2A2B-11Z
DPST-NC 12, 24 VDC G7Z-2A2B-02Z

Specifications

■Ratings

Coil Ratings

■Accessories (Order Separately)

Auxiliary Contact Block

Contact

configuration

DPST-NO G73Z-20Z
SPST-NO/SPST-NC G73Z-11Z
DPST-NC G73Z-02Z

Model

Item Rated current Coil resistance Must operate

Rated voltage Percentage of rated voltage
12 VDC 333 mA 39
24 VDC 154 mA 156

Note: 1. Rated current and coil resistance were measured at a coil temperature of 23°C with coil resistance of ±15%.

2. Operating characteristic s were measured at a coil temperature of 23

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
There is, however, no continuous allowance.

°C.

Ω 75% max. 10% min. 110% Approx. 3.7 W

Ω

voltage

Must release

voltage

°C.

Maximum

voltage

Power

consumption

Contact Ratings

Relay

Model G7Z-4A-@Z, G7Z-3A1B-@Z,

Item Load Resistive

Contact structure Double break
Contact materia l Ag alloy
Rated load NO 40 A at

Rated carry current NO 40 A 22 A 5 A

Maximum contact voltage 480 VAC 125 VDC
Maximum contact

current
Maximum switching

capacity
Failure rate P value (reference

value)

Note: The ratings for the auxiliary contact block mounted on the G7Z are the

same as those for the G73Z auxiliary contact block.

440 VAC

NC 25 A at

440 VAC

NC 25 A 10 A 5 A

NO 40 A
NC 25 A
NO 17,600 VA 9,680 VA 550 W
NC 1 1,00 0 VA 4,400 VA 550 W

2 A at 24 VDC

load

G7Z-2A2B-@Z

Inductive

load cos

φ =

0.3

22 A at
440 VAC

10 A at
440 VAC

Resistive

load L/R = 1

ms

5 A at
110 VDC

5 A at
110 VDC

Auxiliary Contact Block

Model G73Z-20Z, G73Z-11Z, G73Z-02Z

Item Load Resistive

Contact structure Double break
Contact material Au clad + Ag
Rated load 1 A at

Rated carry current 1 A
Maximum contact voltage 480 VAC 125 VDC
Maximum contact current 1 A
Maximum switching capacity 440 VA 220 VA 110 W
Failure rate P value (reference

value)

load

440 VAC

1 mA at 5 VDC

Inductive

load cos

0.3

0.5 A at
440 VAC

φ =

Resistive

load L/R = 1

ms

5 A at
110 VDC

Powe r Re la ys G7Z 5