New Product News DC Power Relays G9EJ DC Power Relays Capable of DC Loading at High Voltage and Current • Actualize improvement of inrush-withstand performance and a long-life by adopting Omron’s own contact driving system. • Actualize a high capacity interruption through the function of extinction of magnetic arc by adopting high-efficiency magnetic circuit. • Small and lightweight type. Size: H30 mm × W27 mm × L31 mm, Weight: approx. 50 g. RoHS Compliant Refer to the Precautions on page 4. Model Number Structure G9EJ-@-@-@-@ ——— — 1 2 3 4 1. Number of Poles 1: 1 pole 3. Coil Terminals Blank: Tab terminal 2. Contact Form Blank: SPST-NO 4. Special Functions Ordering Information Terminals Models Coil terminals Contact terminals #250 Tab #250 Tab Switching type Contact form Rated coil voltage Model SPST-NO 12 VDC G9EJ-1 Ratings ● Coil Rated voltage 12 VDC Rated current 167 mA Coil resistance 72 Ω Must-operate voltage 60% max. of rated voltage Must-release voltage 5% min. of rated voltage Maximum voltage(See note 3) 130% of rated voltage (at 23°C within 2 minutes) Power consumption Approx. 2 W 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. ● Contacts Item Rated load Condenser load 25 A at 400 VDC Maximum switching voltage 400 V Maximum switching current 25 A 1 G9EJ DC Power Relays Characteristics Item G9EJ-1 Contact voltage drop 0.5 V max. (for a carry current of 5 A) Operate time 50 ms max. Release time 30 ms max. Between coil and contacts Insulation resistance *1 1,000 MΩ min. Between contacts of the same polarity 1,000 MΩ min. Between coil and contacts Dielectric strength 2,500 VAC 1 min Between contacts of the same polarity 2,500 VAC 1 min Impulse withstand voltage *2 Vibration resistance *3 4,000 V Destruction 5 to 200 to 5 Hz, Acceleration: 44.1 m/s2 Malfunction 5 to 200 to 5 Hz, Acceleration: 44.1 m/s2 490 m/s2 Destruction Shock resistance 490 m/s2 Energized Malfunction 98 m/s2 Deenergized Mechanical endurance *4 200,000 min. Electrical endurance (condenser load) *5 400 VDC, 25 A, 100,000 ops. min. Short-time carry current 20 A (1 min) Maximum interruption current (resistive load) 30 A at 400 VDC (100 times min.) Overload interruption (resistive load) 20 A at 400 VDC (300 times min.) Ambient operating temperature -40 to 85°C (with no icing or condensation) Ambient operating humidity 5% to 85% Weight (including accessories) Approx. 50 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. Engineering Data ● Electrical Endurance (Interruption Performance) 100 Operations Operations (×10,000) ● Electrical Endurance (Inrush Current Performance) 50 10,000 5,000 3,000 1,000 30 500 300 100 10 50 30 5 10 3 5 3 10 30 50 1 100 1 3 5 10 30 Switching current (A) 10,000 5,000 3,000 1,000 500 300 100 50 30 100 ● Must-operate Voltage and Mustrelease Voltage Distributions (Number of Relays × Percentage of Rated Voltage) Number of Relays Energizing time (s) ● Carry Current vs. Energizing Time 50 Switching current (A) 30 Must-operate Voltage Must-release Voltage 25 20 ● Time Characteristic Distributions (Number of Contacts × Time (ms)) Number of Contacts 1 30 Operate time Release time 25 20 15 15 10 10 5 5 10 5 3 1 1 3 5 10 30 50 100 Carry current (A) 2 0 20 40 60 80 100 Percentage of rated voltage (%) 0 3 6 9 12 15 Time (ms) G9EJ ● Vibration Malfunction ● Vibration Resistance Acceleration (m/s2) Rate of change (%) DC Power Relays 60 50 Unconfirmed area 40 10.0 ● Shock Malfunction Must-operate Voltage 8.0 Z Z´ Z 500 Must-release Voltage 6.0 400 4.0 300 X Y´ X X´ Y Y 200 2.0 100 30 0.0 Confirmed area −2.0 100 20 200 −4.0 Y´ Deenergized 300 −6.0 10 400 −8.0 0 1 3 5 10 30 50 100 Start Energized 500 Z´ −10.0 300 500 1000 Frequency (Hz) X´ After test The value at which malfunction occurred was measured after applying shock to the test piece 3 times each in 6 directions along 3 axes. Characteristics were measured after applying vibration at a frequency of 5 to 200 to 5 Hz, acceleration of 44.1 m/s2 to the test piece (not energized) for 2 hours each in 3 directions. The percentage rate of change is the average value for all of the samples. Note: The Upper limit of double amplitude: 10 mm P-P Rate of change (%) ● Shock Resistance 10.0 Must-operate Voltage 8.0 Must-release Voltage 6.0 4.0 2.0 0.0 −2.0 −4.0 −6.0 −8.0 −10.0 Start After test Characteristics were measured after applying a shock of 490 m/s2 to the test piece 3 times each in 6 directions along 3 axes. The percentage rate of change is the average value for all of the samples. Dimensions (Unit: mm) G9EJ-1 Terminal Arrangement (BOTTOM VIEW) 27 31 2 (−) 4 30 (+) 1 3 11 0.8 6.3 6.3 Conecter terminal (Tab 250) 0.8 Dimension (mm) Tolerance (mm) 10 or lower ±0.3 10 to 50 ±0.5 15.5 15.4 8.5 0.8 20.9 3 G9EJ DC Power Relays Precautions WARNING 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 low-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. • Application examples provided in this document are for reference only. In actual applications, confirm equipment functions and safety before using the product. • Consult your OMRON representative before using the product under conditions which are not described in the manual or applying the product to nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems or equipment that may have a serious influence on lives and property if used improperly. Make sure that the ratings and performance characteristics of the product provide a margin of safety for the system or equipment, and be sure to provide the system or equipment with double safety mechanisms. Note: Do not use this document to operate the Unit. OMRON Corporation ELECTRONIC AND MECHANICAL COMPONENTS COMPANY Contact: www.omron.com/ecb Cat. No. J193-E1-02 0114 (0413) (O)