Omron G5NB-1A-E 24VDC relay


The Omron G5NB-1A-E 24VDC relay is a versatile electromechanical device with the following functions and features:

1. Control Function

  • Electrical Switching: It serves as an electrical switch that can open or close an electrical circuit. When a control voltage of 24VDC is applied to its coil, the internal contacts of the relay change their state. The normally open (NO) contact closes, allowing current to flow through the connected circuit, and the normally closed (NC) contact (if applicable) opens, interrupting the current in its associated circuit. This enables precise control of electrical loads such as motors, lamps, solenoids, and other electrical devices.
  • Isolation: The relay provides electrical isolation between the control circuit (where the 24VDC control voltage is applied to the coil) and the load circuit (connected to the contacts). This isolation helps protect sensitive control components from electrical surges, spikes, and high voltages present in the load circuit. It also allows different electrical systems with different voltage levels to be interfaced safely.

2. Contact Ratings

  • Contact Current Capacity: The G5NB-1A-E is designed to handle a certain amount of current through its contacts. It can switch both AC and DC loads within its specified current ratings. For example, it may be capable of switching a maximum load current of a few amperes (the specific value depends on the application conditions and load type), ensuring reliable operation when controlling moderate electrical loads.
  • Contact Voltage Ratings: It has specific voltage ratings for both AC and DC. This determines the maximum voltage that the contacts can safely interrupt and switch. The relay is suitable for use in circuits with voltages within its rated range, preventing arcing and contact damage during operation.

3. Coil Characteristics

  • 24VDC Coil: The relay has a coil that is designed to operate at a DC voltage of 24V. When the 24VDC voltage is applied to the coil, it generates a magnetic field that activates the internal mechanical mechanism to change the contact state. The coil has a certain power consumption and resistance value, which are important parameters for ensuring proper operation of the relay within the control circuit.
  • Coil Sensitivity: It is designed to be sensitive enough to respond to the 24VDC control voltage with a relatively low power input. This allows it to be easily controlled by various types of control circuits, such as microcontroller output ports or other low-power control sources.

4. Reliability and Durability

  • Mechanical Life: The relay is engineered to have a long mechanical life, with a high number of contact operations (such as hundreds of thousands or even millions of operations) under normal operating conditions. This makes it suitable for applications where frequent switching is required, ensuring consistent performance over an extended period.
  • Electrical Life: In addition to mechanical life, it also has a specified electrical life. The contacts are designed to withstand the electrical stresses associated with repeated switching of the load current and voltage, maintaining their integrity and conductivity over time. This helps ensure reliable operation of the electrical circuit that the relay controls.

5. Compact Design

  • Space-saving: The G5NB-1A-E has a compact form factor, which makes it suitable for applications where space is limited. It can be easily integrated into small electrical enclosures, control panels, or printed circuit boards, allowing for efficient use of available space in various electrical systems.

6. Environmental Adaptability

  • Operating Temperature Range: It is designed to operate within a specific temperature range, such as -40°C to +70°C (this may vary depending on the exact specifications). This enables it to be used in a wide variety of environmental conditions, from relatively cold industrial settings to warmer indoor applications.
  • Humidity Resistance: The relay is built to resist the effects of humidity to a certain extent. It can maintain its performance and reliability even in environments with moderate levels of humidity, reducing the risk of corrosion or electrical failures due to moisture.
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