Omron G7Z-4A-20Z, G7Z-4A-11Z, G7Z-4A-02Z, G7Z-3A1B-20Z, G7Z-3A1B-11Z User Manual
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Power Relays
G7Z
High-capacity Power Relays Capable
of Carrying and Switching 40 A at 440 VAC
Compact
40%
smaller than
contactors (IEC-
AC1, 50-A
High
specifications)
High
Capacity
IEC-AC1 40-A rating
4-pole power fully applied:
160 A
Mirror Contacts
for
Safety Function
Insulation
Load switching for
400-VAC systems
Low
Noise
Approx. 70 dB
Low Power
Consumption
Less than 4 W DC
RoHS
Compliant
Simple
Mounting
Current capacity
Conventional usage division
Contactor
current
range
G7Z
Expansion of relay range
G7Z
TH
SA
Downsizing of approximately 40% volume compared with contactors.*
Contributes to space savings in control panels.
* IEC-AC1 50-A specifications
The Relay can be easily mounted right on a DIN Track.
Application Example: General Safety Circuit
G9SA-301 (24-V AC/DC) (two limit switchinput channels with manual reset)
Compact Size
Safety Function with Mirror Contacts
Low Noise and
Low Power Consumption
DIN Track Mountable
Feedback circuit
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
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.
* IEC-AC1 50-A specifications
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.
* Always consult with your OMRON representative
before using the maximum current of 160 A.
High Capacity and
High Insulation
84 mm
60 mm
62 mm
45 mm
Feedbackloop
Control
circuit
Open
4 Power Relays G7Z
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 loa d capacity of 160 A when using 4-pole par allel
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: Re fer to th e Pr ecaut ions for Correct Use on page 9.
Model Number Structure
■Model Numbe r Legend
Relay with Auxiliary Contact Block
1. Relay Contact Configuration
4A: 4PST-NO
3A1B: 3PST-NO/SPS T-NC
2A2B: DPST-NO/DPST-NC
2. Contact 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
1. Contact Configuration of Auxiliary Contacts
20: DPST-NO
11: SPST-NO/SPST-NC
02: DPST-NC
2. Contact Mechanism of Auxiliary Contacts
Z: Bifurcated crossbar contact
■Configuration
Note: 1. Relay contact terminals are M5, and the coil terminals are M3.5.
2. Auxiliary contact block terminals are M3.5.
123
G7Z-@-@@
1 2
G73Z-@@
Structure Contact configuratio n Screw terminals
Classification Relay Auxiliary Contact
Block
Relay with Auxilia ry
Contact Block
4 poles +
2 poles
4PST-NO DPST-NO G7Z-4A-20Z
SPST-NO/SPST-NC G7Z-4A-11Z
DPST-NC G7Z-4A-02Z
3PST-NO/SPST-NC DPST-NO G7Z-3A1B-20Z
SPST-NO/SPST-NC G7Z-3A1B-11Z
DPST-NC G7Z-3A1B-02Z
DPST-NO/DPST-NC DPST-NO G7Z-2A2B-20Z
SPST-NO/SPST-NC G7Z-2A2B-11Z
DPST-NC G7Z-2A2B-02Z
Auxiliary Contact Block 2 poles --- DPST-NO G73Z-20Z
SPST-NO/SPST-NC G73Z-11Z
DPST-NC G73Z-02Z
Power R elay s G7Z 5
Ordering Information
■Relay with Auxiliary Contact
Block
Relay with Auxiliary Contact Block
(for Screw Terminals)
■Accessories (Order Separately)
Auxiliary Contact Block
Specifications
■Ratings
Coil Ratings
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 co il 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 ambi ent
temperature of 23
°C.
There is, however, no continuous allowance.
Contact Ratings
Relay
Note: The ratings for the auxiliary contact block mounted on the G7Z are the
same as those for the G73Z auxiliary contact block.
Auxiliary Contact Block
Contact configuratio n Rated voltage Model
Relay Auxiliary contact
block
4PST-NO DPST-NO 12, 24 VDC G7Z-4A-20Z
SPST-NO/SPST-NC 12, 24 VDC G7Z-4A-11Z
DPST-NC 12, 24 VDC G7Z-4A-02Z
3PST-NO/
SPST-NC
DPST-NO 12, 24 VDC G7Z-3A1B-20Z
SPST-NO/SPST-NC 12, 24 VDC G7Z-3A1B-11Z
DPST-NC 12, 24 VDC G7Z-3 A1B-02Z
DPST-NO/
DPST-NC
DPST-NO 12, 24 VDC G7Z-2A2B-20Z
SPST-NO/SPST-NC 12, 24 VDC G7Z-2A2B-11Z
DPST-NC 12, 24 VDC G7Z-2 A2B-02Z
Contact
configuration
Model
DPST-NO G73Z-20Z
SPST-NO/SPST-NC G73Z-11Z
DPST-NC G73Z-02Z
Item Rated current Coil resistance Must operate
voltage
Must release
voltage
Maximum
voltage
Power
consumption
Rated voltage Percentage of rated voltage
12 VDC 333 mA 39
Ω 75% max. 10% min. 110% Approx. 3.7 W
24 VDC 154 mA 156
Ω
Model G7Z-4A-@Z, G7Z-3A1B-@Z,
G7Z-2A2B-@Z
Item Load Resistive
load
Inductive
load cos
φ =
0.3
Resistive
load L/R = 1
ms
Contact structure Double break
Contact materia l Ag alloy
Rated load NO 40 A at
440 VAC
22 A at
440 VAC
5 A at
110 VDC
NC 25 A at
440 VAC
10 A at
440 VAC
5 A at
110 VDC
Rated carry current NO 40 A 22 A 5 A
NC 25 A 10 A 5 A
Maximum contact voltage 480 VAC 125 VDC
Maximum contact
current
NO 40 A
NC 25 A
Maximum switching
capacity
NO 17,600 VA 9,680 VA 550 W
NC 1 1,00 0 VA 4,400 VA 550 W
Failure rate P value (reference
value)
2 A at 24 VDC
Model G73Z-20Z, G73Z-11Z, G73Z-02Z
Item Load Resistive
load
Inductive
load cos
φ =
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
5 A at
110 VDC
Rated carry current 1 A
Maximum contact voltage 480 V AC 125 VDC
Maximum contact current 1 A
Maximum switching capacity 440 VA 220 VA 110 W
Failure rate P value (reference
value)
1 mA at 5 VDC
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