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G7Z

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• 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.

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Ratings

Coil

 

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

 

 

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
NC 25 A at 440 VAC 10 A at 440 VAC 5 A at 110 VDC
Rated carry current NO 40 A *
NC 25 A
Maximum contact voltage 480 VAC 125 VDC
Maximum contact current NO 40 A 22 A 5 A
NC 25 A 10 A 5 A
Maximum switching capacity NO 17,600 VA 9,680 VA 550 W
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
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
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)
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
Malfunction NO: 100 m/s2
NC: 25 m/s2
Durability Mechanical 1,000,000 operations min. (at 1,800 operations/h, contact no load)
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
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
NC
contact		 D300
(1-A
current
applied)

 

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
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
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
NC contact 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
NC 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

 

last update: January 5, 2022

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