Product Details Portlet

G9EJ-1-E DC Power Relays

Compact DC Power Relays Capable of Switching 400 V 15 A DC loads

  • Actualize a high capacity interruption through the function of extinction of magnetic arc by adopting high-efficiency magnetic circuit.
  • Actualize improvement of inrush-withstand performance and a long-life by adopting Omron's own contact driving system.
  • Actualize the power saving.
  • Small and lightweight type.
    Size: H31 mm × W27 mm × L44 mm, Weight: approx. 45 g
RoHS Compliant
Model 2D/3D CAD ECAD(Download symbol,FootPrint,3DCAD)
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G9EJ-1-E-UVD DC12 Download Download
G9EJ-1-E-UVD DC24 Download Download
G9EJ-1-P-E-UVD DC12 Download Download
G9EJ-1-P-E-UVD DC24 Download Download
(*) Ultra Librarian uniquely created ECAD data based on the information provided by OMRON. Please note that OMRON does not guarantee the accuracy, concurrence or completeness of ECAD data.
Note: This web page provides an excerpt from a datasheet. Refer to Product Datasheet and other applicable documents for more information.
Models Terminals Contact form Rated coil voltage Model Minimum packing unit
Coil terminals Contact terminals
current conduction models
Tab terminals
Tab terminals
24 VDC
PCB terminals PCB terminals 12 VDC G9EJ-1-P-E-UVD
24 VDC
Rated voltage Rated current Coil resistance Must-operate voltage Must-release voltage Maximum voltage(See note 3) Power consumption
12 VDC 100 mA 120 Ω 60% max. of rated voltage 5% min. of rated voltage 130% of rated voltage
(at 23°C within 10 minutes)
Approx. 1.2 W
24 VDC 50 mA 480 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.

Item Resistive load
Rated load 15 A at 400 VDC
Rated carry current 15 A
Maximum switching voltage 400 V
Maximum switching current 15 A

Item G9EJ-1(-P)-E-UVD
Contact resistance *1 100 mΩ max.
Contact voltage drop 0.2 V max. (for a carry current of 15 A)
Operate time *2 50 ms max.
Release time *2 30 ms max.
Insulation resistance *3 Between coil and contacts 1,000 MΩ min.
Between contacts of the same polarity 1,000 MΩ min.
Dielectric strength Between coil and contacts 2,500 VAC 1 min
Between contacts of the same polarity 2,500 VAC 1 min
Impulse withstand voltage *4 4,500 V
Vibration resistance Destruction 10 to 55 to 10Hz, 0.75 mm single amplitude
(Acceleration: 2.94 to 88.9 m/s2)
Malfunction 10 to 55 to 10Hz, 0.75 mm single amplitude
(Acceleration: 2.94 to 88.9 m/s2)
Shock resistance Destruction 490 m/s2
Malfunction Energized 490 m/s2
Deenergized 98 m/s2
Mechanical endurance *5 200,000 ops. min.
Electrical endurance *6 400 VDC, 15 A, 10,000 ops. min.
Electrical endurance(condenser load) *6 400 VDC, 25 A, 100,000 ops. min.
Short-time carry current 30 A (20 sec.)
Overload switching 400 VDC, 30A, 100 ops. min.
Maximum interruption current 50 A at 400 VDC (5 times)
Reverse polarity interruption –15 A at 400 VDC (1,000 times min.)
Ambient operating temperature -40 to 70°C
(with no icing or condensation)
Ambient operating humidity 5% to 85%
Weight(including accessories) Approx. 45 g
Note: The above values are initial values at an ambient temperature of 23°C unless otherwise specified.
*1. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method.
*2. Measurement conditions: With rated operating voltage applied (without diode), not including contact bounce.
*3. The insulation resistance was measured with a 500 VDC megohmmeter.
*4. The impulse withstand voltage was measured with a JEC-212 (1981) standard impulse voltage waveform (1.2 × 50 μs).
*5. The mechanical endurance was measured at a switching frequency of 3,600 operations/hr.
*6. The electrical endurance was measured at a switching frequency of 60 operations/hr.
(Unit: mm)
Mounting Hole Dimensions

Note: Be sure to connect terminals with the correct polarity.
Coils do not have polarity.

Mounting Hole Dimensions
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5

Mounting Hole Dimensions

Note: Be sure to connect terminals with the correct polarity.
Coils do not have polarity.

Mounting Hole Dimensions
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5


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. The G9EJ Relays’ contacts have polarity. Be sure to perform connections with the correct polarity. If the contacts are connected with the reverse polarity, the switching characteristics specified in this document cannot be assured.
2. 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 and/or minute load switching, the contact resistance may increase and so confirm correct operation under the actual operating conditions.
6. 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.
7. 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%.
8. 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.
9. 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.
10.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.
11.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.
12.Be sure to turn OFF the power and confirm that there is no residual voltage before replacing the Relay or performing wiring.
13.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.
14.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.
15.Use two M3 screws to mount a Relay with tab terminals. (The tightening torque is 0.98 N·m.)
16.Manually mount Relays with PCB Terminals. Do not use automatic soldering for them.
Do not bend the terminals to secure the Relay to the PCB.
17.A Relay with PCB Terminals weighs approximately 45 g.
Be sure that the PCB is strong enough to support it.
18.For the PCBs, we recommend dual-side through-hole PCBs to reduce solder cracking from heat stress.
19.The coil terminals (A in the figure) and contact terminals (B in the figure) on Relays with PCB terminals have charged metal parts. Also, the shaded part in the following diagram may also be charged. When you use the Relay, make sure that there is no metal pattern on the corresponding part of the PCB.