G7L-X PCB Power Relays
Compact Power Relay Capable of Switching 1,000 VDC Loads
- Compact design that achieves high-capacity DC breaking and switching.
(52.5 × 35.5 × 41.0 mm (L×W×H))
- Two poles wired in series to break or switch 600 to 1,000 VDC.
- Complies with solar inverter safety standards (UL and EN).
- Designed for safety with 6.0-mm contact gap (two-pole series wiring).
- UL and VDE conformed.
|Classification||Contact Form||Enclosure rating||Terminal Shape||Model||Rated coil voltage||Minimum|
|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.|
|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.|
|% of rated voltage|
|DC||12||191.7||63||75% max.||10% min.||110%||Approx. 2.3|
|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.|
Contacts (Two-pole Series Wiring)
|Contact type||Double break|
|Contact material||Ag alloy|
|Rated Load||25 A at 600 VDC|
25 A at 1,000 VDC
|20 A at 600 VDC|
20 A at 1,000 VDC
|Rated carry Current||25 A||20 A|
|Max. switching voltage||1,000 VDC|
|Max. switching current||25 A||20 A|
|Contact resistance*1||100 mΩ max.|
|Operate time*2||30 ms max.|
|Release time*3||30 ms max.|
|Insulation resistance*3||1,000 MΩ min.|
|Dielectric strength||Between coil and|
|4,000 VAC, 50/60 Hz for 1 min|
of the same
|2,000 VAC, 50/60 Hz for 1 min|
of different polarity
|2,000 VAC, 50/60 Hz for 1 min|
|Between coil and|
|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)|
|Durability||Mechanical *5||1,000,000 operations min. (at 1,800 operations/h)|
(Resistive load) *6
|100 operations (25 A, 1,000 VDC, 85°C)|
6,000 operations (25 A, 600 VDC, 85°C)
(at 360 operations/h under resistive load,
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 under rated load,
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|
|*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 standard diode and zener diode are connected to the relay coil.|
|*6.||For two-pole series wiring. Also, a standard diode and zener diode are connected to the relay coil.|
• The relay contacts are polarized. Incorrect wiring may cause a failure to break the circuit. Wire the Relay with care.
• 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.
• These Power Relays are suitable for switching and breaking high-capacity DC. Do not use them for switching minute loads, such as signals.
●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.
|Applied coil voltage||Coil resistance*||Power consumption|
|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 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.
●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.