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G7Z

Power Relays

G7Z

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

Ratings

Coil Ratings

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.

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
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

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
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)
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 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.