DC Power Relays (25-A Models) G9EB-1 DC Power Relays Capable of Interrupting High-voltage, High-current DC Load Utilizes a unique gas-filled, fully sealed, non-ceramic construc- tion achieved by using resin with a metal case. This reduces the need for special processing and materials that were required with previous models, resulting in a low-cost relay that is both compact and lightweight. Smallest and lightest in its class at 25 60 58 mm and approx- imately 135 g. This is approximately half the volume and a third of the weight of other DC Power Relays in the same class (400 VDC, 25 A).* The unique design of the contact switching component and per- manent magnet for blowing out the arc eliminates the need for polarity in the main circuit (contact terminal). This improves ease of wiring and installation, and contributes to providing fail- safe measures against incorrect wiring. * Based on our investigation as of December 2004. Note: Refer to Precautions on page 22. Model Number Structure Model Number Legend G9EB- - - - 12 34 1. Number of Poles 1: 1 pole 2. Contact Form Blank: SPST-NO 3. Coil Terminals B: M4 screw terminals 4. Special Functions Ordering Information List of Models Models Terminals Contact form Coil rated voltage Model Coil terminals Contact terminals Switching/current con- Screw terminals (See note 2.) Screw terminals SPST-NO 12 VDC G9EB-1-B duction models (See note 1.) 24 VDC 48 VDC 60 VDC 100 VDC Note: 1. Two M4 screws are provided for the contact terminal connection. 2. Two M4 screws are provided for the coil terminal connection. DC Power Relays (25-A Models) G9EB-1 17Specifications Ratings Coil Rated voltage Rated current Coil resistance Must-operate Must-release Maximum voltage Power voltage voltage (See note 3.) consumption 12 VDC 166.7 mA 72 75% max. of rated 10% min. of rated 130% of rated volt- Approx. 2 W voltage voltage age (at 23C within 24 VDC 83.3 mA 288 10 minutes) 48 VDC 41.7 mA 1,152 60 VDC 33.3 mA 1,800 100 VDC 20 mA 5,000 Note: 1. The figures for the rated current and coil resistance are for a coil temperature of 23C and have a tolerance of 10%. 2. The figures for the operating characteristics are for a coil temperature of 23C. 3. The figure for the maximum voltage is the maximum voltage that can be applied to the relay coil. Contacts Item Resistive load G9EB-1(-B) Rated load 25 A at 250 VDC Rated carry current 25 A Maximum switching voltage 250 V Maximum switching current 25 A Characteristics Item G9EB-1-B Contact resistance (See note 2.) 30 m max. Contact voltage drop 0.1 V max. (for a carry current of 25 A) Operate time 30 ms max. Release time 15 ms max. Insulation resistance Between coil and contacts 1,000 M min. (See note 3.) Between contacts of the same polarity 1,000 M 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 (See note 4.) 4,500 V 2 Vibration resistance Destruction 10 to 55 to 10 Hz, 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s ) 2 Malfunction 10 to 55 to 10 Hz, 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s ) 2 Shock resistance Destruction 490 m/s 2 Malfunction 100 m/s Mechanical endurance (See note 5.) 100,000 operations min. Electrical endurance (resistive load) (See note 6 and 7.) 250 VDC, 25 A, 30,000 ops. min. Short-time carry current 50 A (5 min), 40 A (10 min) Maximum interruption current (See note 7.) 100 A at 250 VDC (5 times) Overload interruption (See note 7.) 50 A at 250 VDC (50 times min.) Ambient operating temperature 40 to 70C (with no icing or condensation) Ambient operating humidity 5% to 85% Weight (including accessories) Approx. 135 g Note: 1. The above values are initial values at an ambient temperature of 23C unless otherwise specified. 2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method. 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 s). 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. 7. These values are for when a varistor is used as the protective circuit against reverse surge in the relay coil. Using a diode will reduce the switching characteristics. 18 DC Power Relays (25-A Models) G9EB-1