Product Details Portlet

G7L-X PCB Power Relays

Compact Power Relay Capable of Switching 1,000 VDC Loads

  • DC high capacity switching for both normal and reverse polarity available by adding reverse polarity specification addition.
  • Two poles wired in series to break or switch 600 to 1,000 VDC.
  • Contribute for lower power consumption.
    (low power consumption of approx. 600 mW at 50% reduced coil voltage).
  • UL and EN conformed.
  • Designed for safety with 6.0-mm contact gap (two-pole series wiring).
RoHS Compliant
Note: This web page provides an excerpt from a datasheet. Refer to Product Datasheet and other applicable documents for more information.
Classification Contact Form Enclosure rating Terminal Shape Model Rated coil voltage Minimum
packing unit
Standard model DPST-NO* Flux protection PCB terminals G7L-2A-X 12 VDC, 24 VDC 20 pcs./tray
General purpose model G7L-2A-X-L
Note. When ordering, add the rated coil voltage to the model number.
  Example: G7L-2A-X DC24
    Rated coil voltage
  However, the notation of the coil voltage on the product case as well as on the packing will be marked as[][] VDC.
* It is assumed that the Relay will be used with 2-pole series wiring.
Coil
  Item
Rated Voltage (V)
Rated
current
(mA)
Coil
resistance
(Ω)
Must operate
voltage
Must release
voltage
Max. voltage
Power
consumption
(W)
% of rated voltage
DC 12 191.7 63 75% max. 10% min. 110% Approx. 2.3
Approx. 0.6 *
24 95.8 250
Note: 1. The rated current and coil resistance were measured at a coil temperature of 23°C with tolerances of ± 15%.
  2. The operating characteristics are measured at a coil temperature of 23°C.
  3. The maximum permissible 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.
* Power consumption with Holding Voltage is 0.6 W. Please confirm the detail in page 4 Coil Voltage Reduction (Holding Voltage).

Contacts (Two-pole Series Wiring)
  Model
Item Load
G7L-2A-X
G7L-2A-X-L
Resistive load
Contact type Double break
Contact material Ag alloy
Rated Load 30 A at 600 VDC
25 A at 1,000 VDC
20 A at 600 VDC
20 A at 1,000 VDC
Rated carry Current * 30 A 20 A
Max. switching voltage 1,000 VDC
Max. switching current 30 A 20 A
* Refer to Usage for continuous current on the page 5 for the continuous current more than 25 A.

Characteristics
Item
G7L-2A-X
G7L-2A-X-L
Contact resistance*1 100 mΩ max.
Operate time*2 30 ms max.
Release time*2 *5 30 ms max.
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 the same
polarity
2,000 VAC, 50/60 Hz for 1 min
Between contacts
of different polarity
2,000 VAC, 50/60 Hz for 1 min
Impulse
withstand
voltage *4
Between coil and
contacts
10 kV
Vibration resistance Destruction 10 to 55 to 10 Hz, 0.75 mm single amplitude (1.5 mm double amplitude)
Malfunction 10 to 55 to 10 Hz, 0.75 mm single amplitude (1.5 mm double amplitude)
Shock
resistance
Destruction 1,000 m/s2
Malfunction 100 m/s2
Mechanical durability *5 1,000,000 operations min. (at 1,800 operations/h)
Electrical durability *5 *6
(Resistive load, for
two-pole series wiring.)
Normal polarity 100 operations (25 A, 1,000 VDC, 85°C)
6,000 operations (30 A, 600 VDC, 85°C)
(at 360 operations/h, ON for 1 s and OFF for 9 s)
100 operations (20 A, 1,000 VDC, 85°C)
6,000 operations (20 A, 600 VDC, 85°C)
(at 360 operations/h, ON for 1 s and OFF for 9 s)
Reverse polarity 5,000 operations (-30 A, 600 VDC, 85°C)
(at 360 operations/h, ON for 1 s and OFF for 9 s)
5,000 operations (-20 A, 400 VDC, 85°C)
(at 360 operations/h, ON for 1 s and OFF for 9 s)
Ambient operating temperature −40° to 85°C (with no icing or condensation)
Ambient operating humidity 5% to 85%
Weight Approx. 100 g
Note:The values given above are initial values.
*1. Measurement conditions: 5 VDC, 1 A, voltage drop method.
*2. Measurement conditions: Rated operating voltage applied, not including contact bounce.
Ambient temperature: 23°C
*3. Measurement conditions: The insulation resistance was measured with a 1,000-VDC megohmmeter at the same locations as the dielectric strength was measured.
*4. JEC-212 (1981) Standard Impulse Wave Type (1.2×50μs).
*5. A diode and zener diode are connected to the relay coil
*6. The polarity can not be changed every switching. Refer to Polarity change when switching on the page 5.
(Unit: mm)
G7L-2A-X
G7L-2A-X-L
G7L-2A-X/G7L-2A-X-L

Terminal Arrangement/Internal
Connections (BOTTOM VIEW)

Terminal Arrangement/Internal Connections (BOTTOM VIEW)
Contacts are Polarized. Perform wiring
with care. The coil has no polarity.

Two-pole Series Wiring Diagram
(BOTTOM VIEW)

Two-pole Series Wiring Diagram (BOTTOM VIEW)
Wire the two poles in a series connection to use the Relay.

PCB Mounting Holes (BOTTOM VIEW)

Correct Use

●Installation

  • Contacts are polarized, and durability is the different by polarity. Failure to observe correct DC load connection will result in reduced durability and may risk failure in application.
  • The Relay is designed and manufactured under the assumption that it will be used with 2-pole series wiring. Do not use just one pole only.
  • Install the Relays in locations that are as dry as possible and have as little dust, dirt, and harmful gas.
  • Using the Relay under high temperature, high humidity, or harmful gas may deteriorate its performance characteristics due to condensation or corrosive materials, resulting in failure or burn damage to the Relay.
  • The Relay weighs approx. 100 g. Be sure that the PCB is strong enough to support it.
    We recommend dual-side through-hole PCBs to reduce solder cracking from heat stress.

●Micro Loads

  • These Power Relays are suitable for switching and breaking high-capacity DC. At high-voltage and low-current, breaking characteristics may become unstable. For 1 A or lower switching applications, please consult us.

●Soldering PCB Terminals

  • Do not perform automatic soldering. Always solder the terminals manually.
  • Solder with the following conditions: Soldering iron temperature (max.) 380°C, Soldering time within 10 seconds.
  • The G7L-X is not sealed. Do not wash the G7L-X with water or detergent.

●Coil Voltage Reduction (Holding Voltage) after Relay Operation

  • If the coil voltage is reduced to the holding voltage after Relay operation, first apply the rated voltage to the coil for at least 100 ms, as shown below.
  • A voltage of at least 50% of the rated voltage is required for the coil holding voltage. Do not allow voltage fluctuations to cause the coil holding voltage to fall below this level.

Coil Voltage Reduction (Holding Voltage) after Relay Operation

  Applied coil voltage Coil resistance* Power consumption
Rated voltage 100% 63Ω(DC12)
250Ω(DC24)
Approx. 2.3W
Holding voltage 50% Approx. 0.6W

* The coil resistance were measured at a coil temperature of 23°C with tolerances of ± 15%.

●Connection of Diodes to the Operation Coil

  • Connect the standard diode and zener diode (or varistors) to the relay coil. (Refer to the following figure.) The diode absorbs coil surge. Switching performance may be affected if only a diode is used, so use in combination with a zener diode.
  • The coil has no polarity. Connect the diodes in the reverse polarity of the voltage applied to the coil.
  • The recommended zener voltage of the zener diode is one to two times the rated coil voltage.
  • Use a diode with a reverse breakdown voltage at least 10 times the rated voltage of the coil, and a forward current equal to or greater than the rated current of the coil.

Connection of Diodes to the Operation Coil

●PCB Mounting Interval

  • When mounting Relays side by side on a PCB, use them at a holding voltage of 50%.

●Relay Service Life

  • These Relays must be used for high DC voltages. The final failure mode is failure to break the circuit. In a worst-case scenario, burning may extend to surrounding components. Do not use these Relays outside of the specified ratings and service life, or for any application other than high DC voltages. Implement safety circuits and other safety measures to minimize the risk in case of the unlikely event of a failure.
  • The electrical durability of these Relays is specified as the number of load switching operations under a resistive load and OMRON-specified standard testing conditions. The coil drive circuit, ambient environment, switching frequency, or load conditions (e.g., inductive load or capacitor load) may reduce the service life and possibly lead to failure to break. Always confirm the service life in the actual equipment.

●Usage for continuous current

  • Following initial operation, after 20 minutes with a steady state carry current of 25 A or more, the relay must be operated with a voltage of 100% or more than rated voltage.

●Polarity change when switching

  • During switching operation in application should the polarity change it will reduce switching lifetime performance. Please contact Omron for further information.