Product Details Portlet

G9EN-1 DC Power Relays

DC Power Relays that Enable DC Load Interruption at High Voltage and Current

  • Enable downsizing, weight saving, and non-polarization in the main contact circuit (contact terminal) by using proprietary design of the contact block.
  • Contributes to improvements in the ease of wiring and mounting, and error-proofing against faulty wiring.
  • Class’ smallest: H50 mm × W28 mm × L40 mm
    Class’ lightest: approx. 140 g.
    Accomplished half-size reduction in volume and weight when compared to Omron's same class product (400 VDC, 60 A). *

    * Omron’s internal investigation of August 2012
  • Safety standard approvals obtained.
ModelsTerminalsContact formRated coil voltageModel
Coil terminalsContact terminals
Switching/current conduction modelsLead wireScrew terminalsSPST-NO12 VDCG9EN-1(-UVD)
24 VDC
Note:Two M4 screws are provided for the contact terminal connection.
Rated voltageRated currentCoil resistanceMust-operate voltageMust-release voltageMaximum voltage(See note 3)Power consumption
12 VDC417 mA28.8 Ω60% max. of rated voltage5% min. of rated voltage130% of rated voltage
(at 23°C within 10 minutes)
Approx. 5 W
24 VDC208 mA115.2 Ω
Note: 1.The figures for the rated current and coil resistance are for a coil temperature of 23°C and have a tolerance of ±10%.
Note: 2.The figures for the operating characteristics are for a coil temperature of 23°C.
Note: 3.The figure for the maximum voltage is the maximum voltage that can be applied to the relay coil.

ItemResistive load
Rated load60 A at 400 VDC
Rated carry current60 A
Maximum switching voltage400 V
Maximum switching current60 A

Contact voltage drop0.1 V max. (for a carry current of 60 A)
Operate time40 ms max.
Release time20 ms max.
Insulation resistance *1Between coil and contacts1,000 MΩ min.
Between contacts of the same polarity1,000 MΩ min.
Dielectric strengthBetween coil and contacts2,500 VAC 1 min
Between contacts of the same polarity2,500 VAC 1 min
Impulse withstand voltage *24,500 V
Vibration resistance *3Destruction5 to 200 to 5 Hz, Acceleration: 44.1 m/s2
Malfunction5 to 200 to 5 Hz, Acceleration: 44.1 m/s2
Shock resistanceDestruction490 m/s2
MalfunctionEnergized490 m/s2
Deenergized98 m/s2
Mechanical endurance *4200,000 min.
Electrical endurance *5 *6400 VDC, 60 A, 3,000 ops. min.
Short-time carry current180 A (1min)
Maximum interruption current *6500 A at 400 VDC (3 times)
Overload interruption *6250 A at 400 VDC (200 times min.)
Ambient operating temperature-40 to 85°C (with no icing or condensation)
Ambient operating humidity5% to 85%
WeightApprox. 140 g
Note:The above values are initial values at an ambient temperature of 23°C unless otherwise specified.
*1.The insulation resistance was measured with a 500-VDC megohmmeter.
*2.The impulse withstand voltage was measured with a JEC-212 (1981) standard impulse voltage waveform (1.2 × 50 μs).
*3.The Upper limit of double amplitude: 10 mm P-P
*4.The mechanical endurance was measured at a switching frequency of 3,600 operations/hr.
*5.The electrical endurance was measured at a switching frequency of 60 operations/hr.
*6.The switching performance and interruption performance were measured with a Zener diode and normal diode connected to absorb coil surge. These performances will be lower if only a normal diode is used.
(Unit: mm)
Terminal Arrangement/
Internal Connections

Mounting Hole Dimensions

Dimension (mm)Tolerance (mm)
10 or lower±0.3
10 to 50±0.5
50 or higher±1

Correct Use


Take measures to prevent contact with charged parts when using the Relay for high voltages.

Precautions for Correct Use

Refer to the relevant catalog for common precautions.
1. Be sure to tighten all screws to the appropriate torque given below. Loose screws may result in burning due to abnormal heat generation during energization.
• M5 screws: 1.57 to 2.35 N·m
• M4 screws: 0.98 to 1.37 N·m
• M3.5 screws: 0.75 to 1.18 N·m2. Do not drop or disassemble this Relay. Not only may the Relay fail to meet the performance specifications, it may also result in damage, electric shock, or burning.
3. Do not use these Relays in strong magnetic fields of 800 A/m or higher (e.g., near transformers or magnets). The arc discharge that occurs during switching may be bent by the magnetic field, resulting in flashover or insulation faults.
4. This Relay is a device for switching high DC voltages. If it is used for voltages exceeding the specified range, it may not be possible to interrupt the load and burning may result. In order to prevent fire spreading, use a configuration in which the current load can be interrupted in the event of emergencies.
In order to ensure safety of the system, replace the Relay on a regular basis.
5. If the Relay is used for no-load switching, the contact resistance may increase and so confirm correct operation under the actual operating conditions.
6. These Relays contain pressurized gas. Even in applications with low switching frequencies, the ambient temperature and heat caused by arc discharge in the contacts may allow permeation of the sealed gas, resulting in arc interruption failure.In order to ensure safety of the system, replace Relays on a regular basis.
7. With this Relay, if the rated voltage (or current) is continuously applied to the coil and contacts, and then turned OFF and immediately ON again, the coil temperature, and consequently the coil resistance, will be higher than usual. This means that the must operate voltage will also be higher than usual, exceeding the rated value (“hot start”). In this case, take the appropriate countermeasures, such as reducing the load current or restricting the energizing time or ambient operating temperature.
8. The ripple percentage for DC relays can cause fluctuations in the must-operate voltage or humming. For this reason, reduce the ripple percentage in full-wave rectified power supply circuits by adding a smoothing capacitor. Ensure that the ripple percentage is less than 5%.
9. Ensure that a voltage exceeding the specified maximum voltage is not continuously applied to the coil. Abnormal heating in the coil may shorten the lifetime of the insulation coating.
10.Do not use the Relay at a switching voltage or current greater than the specified maximum values. Doing so may result in arc discharge interruption failure or burning due to abnormal heating in the contacts.
11.The contact ratings are for resistive loads. The electrical endurance with inductive loads is inferior to that of resistive loads. Confirm correct operation under the actual operating conditions.
12.Do not use the Relay in locations where water, solvents, chemicals, or oil may come in contact with the case or terminals. Doing so may result in deterioration of the case resin or abnormal heating due to corrosion or contamination of the terminals. Also, if electrolyte adheres to the output terminals,
electrolysis may occur between the output terminals, resulting in corrosion of the terminals or wiring disconnections. 
13.Be sure to turn OFF the power and confirm that there is no residual voltage before replacing the Relay or performing wiring.
14.The distance between crimp terminals or other conductive parts will be reduced and insulation properties will be lowered if wires are laid in the same direction from the contact terminals.
Use insulating coverings, do not wire in the same direction, and take other measures as required to maintain insulation properties.
15.Use either a varistor, or a diode plus Zener diode as a protective circuit against reverse surge in the relay coil. Using a diode alone will reduce the switching characteristics.
16.Be sure to use the screws provided with the product for wiring coil terminals and contact terminals. The specified tightening torque cannot be achieved with different screws and may result in abnormal heat generation when energized.

Recommended Wire Size
Model                Size
G9EN-1 : 14 to 22 mm2.
*Note: Use flexible leads.