Power Relays
G7Z
Multi-pole Power Relay for Carrying and Switching
Contactor Current Range of 40 A at 440 VAC
• 40 A can be carried and switched on each of 4 poles.
• Possible to reach a maximum load capacity of 160 A when
using 4-pole parallel connections.
• EN 60947-4-1 certification for mirror contact mechanisms
has been obtained by using a combination of the relay and
auxiliary contact blocks.
• Typical applications: high current or high inrush power
supplies, commercial and industrial.
• RoHS compliant.
Model Number Structure
■ Model Number Legend
Relay with Auxiliary Contact Block
Auxiliary Contact Block
G7Z- @ - @ @
G73Z- @ @
1
2 3
1. Relay Contact Configuration
4A: 4PST-NO
3A1B: 3PST-NO/SPST-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
1 2
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
Structure
Contact configuration
Relay
Auxiliary Contact
Block
Classification
Relay with Auxiliary Contact Block 4 poles +
2 poles
4PST-NO
3PST-NO/SPST-NC
DPST-NO/DPST-NC
Auxiliary Contact Block
2 poles
—
DPST-NO
SPST-NO/SPST-NC
DPST-NC
DPST-NO
SPST-NO/SPST-NC
DPST-NC
DPST-NO
SPST-NO/SPST-NC
DPST-NC
DPST-NO
SPST-NO/SPST-NC
DPST-NC
Screw terminals
(See notes 1 and 2)
G7Z-4A-20Z
G7Z-4A-11Z
G7Z-4A-02Z
G7Z-3A1B-20Z
G7Z-3A1B-11Z
G7Z-3A1B-02Z
G7Z-2A2B-20Z
G7Z-2A2B-11Z
G7Z-2A2B-02Z
G73Z-20Z
G73Z-11Z
G73Z-02Z
Note: 1. Relay contact terminals are M5, and the coil terminals are M3.5.
2. Auxiliary contact block terminals are M3.5.
Power Relays
G7Z
329
Ordering Information
■ Relay with Auxiliary Contact
Block
■ Accessories (Order Separately)
Relay with Auxiliary Contact Block (for
Screw Terminals)
Contact
configuration
DPST-NO
SPST-NO/SPST-NC
DPST-NC
Contact configuration
Relay
Auxiliary contact block
4PST-NO DPST-NO
SPST-NO/SPST-NC
DPST-NC
3PST-NO/ DPST-NO
SPST-NC SPST-NO/SPST-NC
DPST-NC
DPST-NO/ DPST-NO
DPST-NC SPST-NO/SPST-NC
DPST-NC
Auxiliary Contact Block
Rated
voltage
Model
12, 24 VDC
12, 24 VDC
12, 24 VDC
12, 24 VDC
12, 24 VDC
12, 24 VDC
12, 24 VDC
12, 24 VDC
12, 24 VDC
G7Z-4A-20Z
G7Z-4A-11Z
G7Z-4A-02Z
G7Z-3A1B-20Z
G7Z-3A1B-11Z
G7Z-3A1B-02Z
G7Z-2A2B-20Z
G7Z-2A2B-11Z
G7Z-2A2B-02Z
Model
G73Z-20Z
G73Z-11Z
G73Z-02Z
Specifications
■ Ratings
Coil Ratings
Item Rated current
Coil
resistance
Rated voltage
12 VDC
24 VDC
333 mA
154 mA
39 Ω
156 Ω
Must operate
Must release
Maximum voltage
Power
voltage
voltage
consumption
Percentage of rated voltage
75% max.
10% min.
110%
Approx. 3.7 W
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
Auxiliary Contact Block
G7Z-4A-@Z, G7Z-3A1B-@Z,
G7Z-2A2B-@Z
Item
Load Resistive Inductive load Resistive load
load
cosφ = 0.3
L/R = 1 ms
Contact structure
Double break
Contact material
AgSnIn
Rated load
NO
40 A at
22 A at
5 A at
440 VAC 440 VAC
110 VDC
NC
25 A at
10 A at
5 A at
440 VAC 440 VAC
110 VDC
Rated carry
NO
40 A
22 A
5A
current
NC
25 A
10 A
5A
Maximum contact voltage 480 VAC
125 VDC
Maximum contact NO
40 A
current
NC
25 A
Maximum
NO
17,600 VA 9,680 VA
550 W
switching capacity NC
11,000 VA 4,400 VA
550 W
Minimum load
2 A at 24 VDC
Model
Note: The ratings for the auxiliary contact block mounted on the G7Z
are the same as those for the G73Z auxiliary contact block.
330
Power Relays
G7Z
Model
G73Z-20Z, G73Z-11Z, G73Z-02Z
Load Resistive Inductive
Resistive
load
load cosφ = load L/R =
0.3
1 ms
Contact structure
Double break
Contact material
AgSnIn + Ag Rotary
Rated load
1 A at
0.5 A at
5 A at
440 VAC 440 VAC
110 VDC
Rated carry current
1A
Maximum contact voltage
480 VAC
125 VDC
Maximum contact current
1A
Maximum switching capacity 440 VA
220 VA
110 W
Minimum load
1 mA at 5 VDC
Item
■ Characteristics
Classification
Item
Relay (See note 6.)
Auxiliary contact block
Model G7Z-4A-@Z, G7Z-3A1B-@Z, G7Z-2A2B-@Z
Contact resistance (See note 2.)
100 mΩ max.
Operating time (See note 3.)
50 ms max.
Release time (See note 3.)
50 ms max.
Maximum operating Mechanical
frequency
Rated load
1,800 operations/h
G73Z-20Z, G73Z-11Z, G73Z-02Z
1,200 operations/h
Insulation resistance (See note 4.)
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 x 50 μs
Between contacts of different polarity
10 kV, 1.2 x 50 μs
—
Between contacts of the same polarity 4.5 kV, 1.2 x 50 μs
Vibration resistance Destruction
Shock resistance
Endurance
10 to 55 to 10 Hz, 0.5-mm single amplitude (1.0-mm double amplitude)
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)
Destruction
Screw mounting: 800 m/s2, DIN Track mounting: 500 m/s2
Malfunction
NO: 100 m/s2
NO: 25 m/s2
Mechanical
1,000,000 operations min. (at 1,800 operations/h, contact no load)
Electrical (See note 5.)
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)
Minimum load
2 A at 24 VDC
Ambient operating temperature
-25 to 60°C (with no icing or condensation)
1 mA at 5 VDC
Ambient operating humidity
5% to 85%
Weight
Approx. 330 g
Note: 1. The above values are initial values.
2. 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.
3. The operate time was measured with the rated voltage imposed with any contact bounce ignored at the ambient temperature of 23°C.
4. The insulation resistance was measured with a 1,000-VDC megohmmeter applied to the same places as those used for checking the
dielectric strength.
5. The electrical endurance was measured at an ambient temperature of 23°C.
6. The specifications for the auxiliary contact block mounted on the G7Z are the same as those for the G73Z auxiliary contact block.
Power Relays
G7Z
331
■ Approved Standards
UL Recognized (File No. E41643) - - Ambient Temp = 40°C
Model
G7Z
Coil
ratings
12, 24
VDC
Contact ratings
NO
40 A, 480 VAC, 60 Hz
contact (Resistive)
5 A, 120 VDC (Resistive)
22 A, 480 VAC, 60 Hz (General Use)
D300* (1-A current applied)
NC
25 A, 480 VAC, 60 Hz
contact (Resistive)
5 A, 120 VDC (Resistive)
10 A, 480 VAC, 60 Hz
(General Use)
D300* (1-A current applied)
Number of
test
operations
80,000
EN Standard/TÜV Certification: EN 60947-4-1
(Certification No. R50079155)
Model
G7Z
Coil ratings
12, 24 VDC
Contact ratings
NO contact AC-1: 40 A, 440 V, 50/60 Hz
AC-3: 16 A, 440 V, 50/60 Hz
DC-1: 5 A, 110 V
100,000
100,000
*AC15: 0.5 A, 440 V, 50/60 Hz
*DC13: 0.5 A, 110 V
—
100,000
NC contact AC-1: 25 A, 440 V, 50/60 Hz
DC-1: 5 A, 110 V
*AC15: 0.5 A, 440 V, 50/60 Hz
*DC13: 0.5 A, 110 V
G73Z
—
—
NO contact AC15: 0.5 A, 440 V, 50/60 Hz
NC contact DC13: 0.5 A, 110 V
Note: Auxiliary contact ratings
Note: Auxiliary contact ratings
Model
G73Z
NO contact
NC contact
Contact ratings
D300 (1-A current applied)
CSA Certification by
332
Power Relays
G7Z
Connections
■ Terminal Arrangement/Internal Connections
Relay with Auxiliary Contact Block
Note: non-polarized coil.
G7Z-4A-20Z
G7Z-4A-11Z
G7Z-4A-02Z
62
5
7
A1 1
3
5
7
A1 1
3
5
7
A2 2
4
6
8
A2 2
4
6
8
A2 2
4
6
8
54 63
G7Z-3A1B-20Z
53
54 63
G7Z-3A1B-11Z
64
A1 1
3
5
21
A2 2
4
6
22
G7Z-2A2B-20Z
53
54 63
62
52 61
53
3
53
54 61
51
64
A1 1
53
54 61
G7Z-3A1B-02Z
62
52 61
62
3
5
21
A1 1
3
5
21
A2 2
4
6
22
A2 2
4
6
22
G7Z-2A2B-11Z
64
51
A1 1
53
54 61
G7Z-2A2B-02Z
62
51
52 61
62
A1 1
3
11
21
A1 1
3
11
21
A1 1
3
11
21
A2 2
4
12
22
A2 2
4
12
22
A2 2
4
12
22
Auxiliary Contact Block
G73Z-20Z
53
54 63
G73Z-11Z
64
53
54 61
G73Z-02Z
62
51
52 61
62
Power Relays
G7Z
333
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Relay (12 VDC, 24 VDC) with Auxiliary Contact Block
4 Poles
Mounting Hole Dimensions
Two, M4
45
39±0.2
15
Four, M3.5
47
Eight, M5
92
84
75.5
Two, M3.5
70.7
51.5
62
Note: The dimensions are typical values.
Auxiliary Contact Block
13
47
32.2
24.2
30
M3.5 x 4
15.7
11
15
Note: The dimensions are typical values.
DIN Track Mounting Height
(when using the PFP-100N or PFP-50N mounting rail)
15
96.3
88.3
75.0
64.3
Note: The dimensions are typical values.
334
Power Relays
G7Z
60
Precautions
Be sure to read the common precautions provided in Best Control Devices Catalog Version 17 before using the Relay.
!WARNING
Take measures to prevent contact with charged
parts when using the Relay for high voltages.
• Mount the Relay sideways when it is mounted on a rail.
• Use End Plates (PFP-M) on both sides of the Relay to make sure
that it is properly secured.
Up
!CAUTION
Do not touch the terminal section (charged parts)
when power is being supplied.
Always use the Relay with terminal covers
mounted. Contact with charged parts may result in
electric shock.
Do not touch the Relay when power is being supplied or right after the power has been turned OFF.
The hot surface may cause burn injury.
DIN Track
(35 mm)
• Provide at least 5 mm of space between the sides and top of the
Relay and nearby grounded metal surfaces.
5 mm min.
■ Precautions for Correct Use
Grounded metal surface
Installation
• Mount the G7Z with the coil terminal at the top.
Up
5 mm min.
Coil terminal
5 mm min.
• Provide at least 30 mm of space between Relays when two or more
Relays are mounted in a row.
30 mm min.
• Do not use the Relay with the terminal screw surfaces facing down.
• The auxiliary contact block (G73Z) can be mounted on the Relay.
Mounting and Removal
Mounting
Terminal screw surface
• To mount the Relay, secure M4 screws in two locations. Use a
screw-tightening torque of 1.2 to 1.3 N•m.
(1)
Hook
Insert the tab on the auxiliary contact
block into the groove on the Relay and
press down until the hook on the auxiliary contact block catches in the
mounting hole on the Relay.
Tab
(2)
39 mm
Removing
(1)
Slide the auxiliary contact block,
remove the auxiliary contact block tab
from the groove on the Relay, and
remove the auxiliary contact block
hook from the Relay.
Tab
(2)
Hook
Be careful not to apply excessive force
on the hook.
Washer (external dia.: 7 max.)
• The Relay can be mounted directly on a mounting rail (PTP) or a
DIN Track (EN 50022-35 x 7.5, 15). The Relay cannot be mounted,
however, to some reinforced rails (e.g., those produced by Kameda
Denki or Toyogiken).
Power Relays
G7Z
335
Connecting
Operating Coil
• Use round or open-end (Y-type) crimp terminals and connect the
terminals with the appropriate tightening torque. Refer to the terminal section space in the following figure for the crimp terminal
dimensions.
(Internal Connections of Coils)
DC Coil
Relay Contacts (Unit: mm)
A2
A1
14.5
12.5
11
6
6
• If a transistor drives the G7Z, check the leakage current and connect a bleeder resistor if necessary.
• The must operate voltage is the minimum value for the Relay armature to operate and the contacts to turn ON. Therefore, fundamentally apply the rated voltage to the coils, taking into consideration
the increases in coil resistance caused by voltage fluctuation and
coil temperature rise.
M5
Mirror Contact Mechanism
Relay Coil
By combining a Relay with an auxiliary contact block, all NC contacts
of the auxiliary contact block will satisfy an impulse withstand voltage
of more than 2.5 kV or maintain a gap of more than 0.5 mm when the
coil is de-energized even if at least one NO contact (main contact) of
the Relay is welded (according to EN 60947-4-1).
6.8
4.3
M3.5
Description of Mirror Contact Mechanism
Auxiliary Contact Block
Impulse withstand voltage: 2.5 kV min. or
contact separation (a + b): 0.5 mm min.
9.5
a
6.8
b
Auxiliary contact block
5.5
5.5
Relay
NC
M3.5
• One crimp terminal can be used for the Relay contact section (M5
screw). Two crimp terminals can be connected for the coil terminal
and auxiliary contact block.
NO
Recommended Crimp Terminals and Wire
Contact welding
Location
Contact
section
Crimp
terminals
Appropriate wire size
5.5-5
2.63 to 6.64 mm2 (AWG12, 10)
8-5
6.64 to 10.52 mm2 (AWG8)
Coil section 1.25-3.5
0.5 to 1.65 mm2 (AWG20 to 16)
• Use the following tightening torque when tightening screws. Loose
screws may result in fire caused by abnormal heat generated when
the power is being supplied.
M5 screws: 2.0 to 2.2 N•m
M3.5 screws: 0.8 to 0.9 N•m
• Allow suitable slack on leads when wiring, and do not subject the
terminals to excessive force.
Microloads
The G7Z is used for switching power loads, such as current carry for
device power supplies and heater loads. Use an auxiliary contact
block (G73Z) if microloads are required for signal applications and
operation status feedback.
336
Power Relays
G7Z
NC
NO
NO
NO
Omron Electronic Components, LLC
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assumed for clerical, typographical or proofreading errors or omissions.
6. Export Controls: Buyer shall comply with all applicable laws, regulations and licenses
regarding (a) export of the Products or information provided by Seller; (b) sale of
Products to forbidden or other proscribed persons or organizations; (c) disclosure to noncitizens of regulated technology or information.
VI. MISCELLANEOUS
1. Waiver: No failure or delay by Seller in exercising any right and no course of dealing
between Buyer and Seller shall operate as a waiver of rights by Seller.
2. Assignment: Buyer may not assign its rights hereunder without Seller's written consent.
3. Law: These Terms are governed by Illinois law (without regard to conflict of laws).
Federal and state courts in Cook County, Illinois have exclusive jurisdiction for any
dispute hereunder.
4. Amendment: These Terms constitute the entire agreement between Buyer and Seller
relating to the Products, and no provision may be changed or waived unless in writing
signed by the parties.
5. Severability: If any provision hereof is rendered ineffective or invalid, such provision shall
not invalidate any other provision.
Power Relays
G7Z
Certain Precautions on Specifications and Use
1. Suitability for Use. Seller shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in
Buyer's application or use of the Product. At Buyer's request, Seller will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not
sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use.
Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer's application, product or system. Buyer
shall take application responsibility in all cases but the following is a nonexhaustive list of applications for which particular attention must be given:
(i) Outdoor use, uses involving potential chemical contamination or electrical
interference, or conditions or uses not described in this document.
(ii) Energy control systems, combustion systems, railroad systems, aviation
systems, medical equipment, amusement machines, vehicles, safety
equipment, and installations subject to separate industry or government
regulations.
(iii) Use in consumer products or any use in significant quantities.
(iv) Systems, machines and equipment that could present a risk to life or
property. Please know and observe all prohibitions of use applicable to this
product.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS
RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE SYSTEM
AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT
THE OMRON PRODUCT IS PROPERLY RATED AND INSTALLED FOR THE
INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
2. Programmable Products. Seller shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
3. Performance Data. Performance data given in this publication is provided as
a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Seller's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to
Seller's Warranty and Limitations of Liability.
4. Change in Specifications. Product specifications and accessories may be
changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed,
or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for
your application. Please consult with your Seller representative at any time to
confirm actual specifications of purchased Product.
5. Errors and Omissions. The information in this publication has been carefully
checked and is believed to be accurate; however, no responsibility is assumed
for clerical, typographical or proofreading errors, or omissions.
6. RoHS Compliance. Where indicated, our products currently comply, to the
best of our knowledge as of the date of this publication, with the requirements
of the European Union's Directive on the Restriction of certain Hazardous
Substances ("RoHS"), although the requirements of RoHS do not take effect
until July 2006. These requirements may be subject to change. Please consult
our website for current information.
Complete “Terms and Conditions of Sale” for product purchase and use are on Omron’s website
at http://www.components.omron.com – under the “About Us” tab, in the Legal Matters section.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
OMRON ON-LINE
OMRON ELECTRONIC
COMPONENTS LLC
55 E. Commerce Drive, Suite B
Schaumburg, IL 60173
Global - http://www.omron.com
USA - http://www.components.omron.com
847-882-2288
Cat. No. X301-E-1
Power Relays
06/09
G7Z
Specifications subject to change without notice
Printed in USA