{"id":280,"date":"2025-08-06T04:21:14","date_gmt":"2025-08-06T04:21:14","guid":{"rendered":"https:\/\/plcautomations.com\/products\/?post_type=product&p=280"},"modified":"2025-08-08T07:40:15","modified_gmt":"2025-08-08T07:40:15","slug":"omron-g3na-225b-dc5-24-solid-state-relay-zero-cross-function-yellow-indicator-phototriac-coupler-isolation-25-a-rated-load-current-24-to-240-vac-rated-load-voltage-5-to-24-vdc-input-voltage-omro","status":"publish","type":"product","link":"https:\/\/plcautomations.com\/products\/product\/omron-g3na-225b-dc5-24-solid-state-relay-zero-cross-function-yellow-indicator-phototriac-coupler-isolation-25-a-rated-load-current-24-to-240-vac-rated-load-voltage-5-to-24-vdc-input-voltage-omro\/","title":{"rendered":"Omron G3NA-225B DC5-24 Solid State Relay, Zero Cross Function, Yellow Indicator, Phototriac Coupler Isolation, 25 A Rated Load Current, 24 to 240 VAC Rated Load Voltage, 5 to 24 VDC Input Voltage OMRON Automation and Safety"},"content":{"rendered":"

The Omron G3NA-225B<\/strong> is a solid-state relay (SSR)<\/strong> designed for high-performance switching in industrial automation applications. Featuring zero-crossing functionality<\/strong>, phototriac coupler isolation<\/strong>, and a rated load current of 25A<\/strong>, this relay is capable of handling 24 to 240 VAC<\/strong> load voltages with a 5 to 24 VDC input<\/strong>. The yellow indicator<\/strong> provides a clear visual status, while the phototriac isolation<\/strong> ensures high noise resistance and improved durability in industrial environments.<\/p>\n

\n

Pros of the Omron G3NA-225B Solid State Relay<\/strong><\/h3>\n
    \n
  1. Zero-Crossing Functionality<\/strong>:\n
      \n
    • The zero-crossing function<\/strong> helps to minimize inrush current<\/strong> and reduce electrical noise during switching. This feature enhances the lifetime of both the relay and the connected equipment. It ensures that the relay switches when the AC voltage waveform crosses zero, making the operation smoother and more energy-efficient.<\/li>\n<\/ul>\n<\/li>\n
    • High Current Handling (25A Rated Load)<\/strong>:\n
        \n
      • With a 25A rated load current<\/strong>, the G3NA-225B<\/strong> is well-suited for controlling high-power equipment<\/strong> like motors, heating elements, and lighting systems. It is capable of managing large currents without the wear and tear of mechanical relays, making it ideal for industrial control systems that require high-power switching.<\/li>\n<\/ul>\n<\/li>\n
      • Wide Load Voltage Range (24-240 VAC)<\/strong>:\n
          \n
        • This relay supports a wide range of load voltages (24-240 VAC)<\/strong>, making it highly versatile and compatible with many industrial systems. It works well with equipment operating on standard AC power<\/strong>, and its flexibility makes it suitable for use in various regions with different power systems.<\/li>\n<\/ul>\n<\/li>\n
        • 5-24 VDC Input Voltage Range<\/strong>:\n
            \n
          • The 5-24 VDC input<\/strong> is a typical control voltage range for many PLC<\/strong> and microcontroller-based systems<\/strong>, allowing easy integration into existing control systems. This input voltage range provides flexibility for various automation applications.<\/li>\n<\/ul>\n<\/li>\n
          • Phototriac Coupler Isolation<\/strong>:\n
              \n
            • The phototriac coupler isolation<\/strong> offers high noise resistance<\/strong> and protects the relay\u2019s control side from electrical surges and spikes. This is particularly useful in environments with electromagnetic interference (EMI)<\/strong>, ensuring reliable operation and protecting the control circuitry from voltage transients.<\/li>\n<\/ul>\n<\/li>\n
            • Compact and Easy to Mount<\/strong>:\n
                \n
              • The compact design<\/strong> allows for easy integration into DIN rail systems<\/strong>, making installation simple and space-efficient in control panels. The size and form factor make it ideal for environments with limited space.<\/li>\n<\/ul>\n<\/li>\n
              • Clear Visual Feedback (Yellow Indicator)<\/strong>:\n
                  \n
                • The yellow indicator LED<\/strong> provides clear visual feedback<\/strong> on the status of the relay, allowing operators to easily monitor whether the relay is in an on<\/strong> or off<\/strong> state. This feature aids in troubleshooting and provides real-time system status without needing additional tools.<\/li>\n<\/ul>\n<\/li>\n
                • Long Operational Life<\/strong>:\n
                    \n
                  • As a solid-state relay<\/strong>, the G3NA-225B<\/strong> has no mechanical parts that wear out, ensuring a long operational lifespan<\/strong>. The lack of moving parts also means the relay can withstand more switching cycles than mechanical relays, which is ideal for applications requiring frequent switching.<\/li>\n<\/ul>\n<\/li>\n
                  • High Switching Speed<\/strong>:\n
                      \n
                    • The solid-state design<\/strong> allows for fast switching speeds<\/strong>, typically in the milliseconds range<\/strong>, which is beneficial for controlling high-speed equipment<\/strong> or systems that require precise timing.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
                      \n

                      Cons of the Omron G3NA-225B Solid State Relay<\/strong><\/h3>\n
                        \n
                      1. No Isolation for DC Load<\/strong>:\n
                          \n
                        • The G3NA-225B<\/strong> is designed for AC load switching and does not support DC load switching<\/strong>. If you need to control DC-powered equipment<\/strong>, you will need to look for a different SSR specifically designed for DC applications<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
                        • Limited to Single-Phase Loads<\/strong>:\n
                            \n
                          • This relay is designed for single-phase AC loads<\/strong> (24-240 VAC). It cannot be used for three-phase<\/strong> systems. For three-phase control, you would need to choose a relay that is designed specifically for multi-phase loads.<\/li>\n<\/ul>\n<\/li>\n
                          • Potential for Overheating at High Loads<\/strong>:\n
                              \n
                            • While the G3NA-225B<\/strong> can handle 25A<\/strong> of current, like all SSRs, it may require additional heat sinking<\/strong> or ventilation<\/strong> to avoid overheating<\/strong> under sustained heavy loads. In high-power applications, it\u2019s important to ensure that proper thermal management<\/strong> is in place to maintain reliable operation.<\/li>\n<\/ul>\n<\/li>\n
                            • Limited Surge Current Capacity<\/strong>:\n
                                \n
                              • While solid-state relays are generally more reliable than mechanical relays, they can still be susceptible to surge currents<\/strong> or spikes<\/strong> during switching. The G3NA-225B<\/strong> does not have the same surge tolerance as a mechanical relay<\/strong>, and a proper inrush current protection<\/strong> circuit might be necessary in certain applications.<\/li>\n<\/ul>\n<\/li>\n
                              • No Direct Digital Communication<\/strong>:\n
                                  \n
                                • The G3NA-225B<\/strong> does not support advanced features like Modbus<\/strong>, Ethernet<\/strong>, or other forms of digital communication<\/strong>. For remote monitoring or integration into a smart automation system<\/strong>, additional components would be required.<\/li>\n<\/ul>\n<\/li>\n
                                • Higher Cost Compared to Mechanical Relays<\/strong>:\n
                                    \n
                                  • While solid-state relays are more durable and faster, they are generally more expensive than traditional mechanical relays<\/strong>. If your application doesn\u2019t require the benefits of solid-state operation<\/strong>, the cost of the G3NA-225B<\/strong> may not justify the benefits for simple switching tasks.<\/li>\n<\/ul>\n<\/li>\n
                                  • Not Suitable for High-Voltage DC Loads<\/strong>:\n
                                      \n
                                    • Similar to its limitation with DC loads, the G3NA-225B<\/strong> is not suitable for controlling high-voltage DC loads<\/strong> (e.g., those used in photovoltaic systems or other high-power DC applications). A dedicated DC solid-state relay<\/strong> would be needed for those environments.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
                                      \n

                                      Q&A Section<\/strong><\/h3>\n

                                      Q: Can the Omron G3NA-225B relay be used for DC applications?<\/strong>
                                      \nA: No, the G3NA-225B<\/strong> is designed for AC applications only<\/strong>. If you need a relay for DC loads, you should look for a DC solid-state relay<\/strong> that is specifically designed for that purpose.<\/p>\n

                                      Q: How does the zero-crossing function work, and why is it important?<\/strong>
                                      \nA: The zero-crossing function<\/strong> ensures that the relay switches when the AC voltage waveform crosses zero<\/strong>. This reduces the impact of inrush current<\/strong> and minimizes electrical noise during the switching process. It helps improve the reliability and lifespan of both the relay and the connected load.<\/p>\n

                                      Q: Is the G3NA-225B suitable for high-frequency switching applications?<\/strong>
                                      \nA: Yes, the G3NA-225B<\/strong> is designed for fast switching<\/strong>, which makes it suitable for applications requiring high-frequency switching<\/strong> (e.g., motors, lighting control, etc.). Its solid-state design<\/strong> allows for near-instantaneous switching<\/strong> with very low latency.<\/p>\n

                                      Q: Can the Omron G3NA-225B relay be used with a 3-phase system?<\/strong>
                                      \nA: No, the G3NA-225B<\/strong> is designed for single-phase<\/strong> loads only. If you need to control 3-phase systems<\/strong>, you will need to select a 3-phase SSR<\/strong> that is designed to handle the power and switching requirements of a 3-phase setup.<\/p>\n

                                      Q: How do I integrate the Omron G3NA-225B into my automation system?<\/strong>
                                      \nA: The G3NA-225B<\/strong> can be easily integrated into your system by connecting the 5-24 VDC control input<\/strong> to a PLC<\/strong> or other control device. The AC load<\/strong> (24-240 VAC) can be connected to the load terminals<\/strong> of the SSR. Make sure to follow proper wiring and safety guidelines during installation.<\/p>\n

                                      Q: What is the typical lifespan of the Omron G3NA-225B solid-state relay?<\/strong>
                                      \nA: The G3NA-225B<\/strong> has a very long operational life due to its solid-state design<\/strong>. It can handle millions of switching cycles without the wear and tear associated with mechanical relays. However, like all SSRs, it may require heat sinking<\/strong> or cooling<\/strong> in high-power applications to ensure long-term reliability.<\/p>\n

                                      Q: Does the Omron G3NA-225B support remote monitoring or control?<\/strong>
                                      \nA: The G3NA-225B<\/strong> does not support remote monitoring<\/strong> or advanced communication<\/strong> features like Modbus or Ethernet. If you need digital communication or IoT integration, you may need additional components or an upgraded version of the SSR.<\/p>\n

                                      \n

                                       <\/p>\n","protected":false},"excerpt":{"rendered":"

                                        \n
                                      • Solid state relays for high-speed switching in low current applications<\/span><\/li>\n
                                      • Screw terminals for connecting to contacts<\/span><\/li>\n
                                      • Noise suppression activated when the load current rises suddenly<\/span><\/li>\n
                                      • Yellow operation indicator alerts users to operating status<\/span><\/li>\n
                                      • UL listed for safety, CSA certified for quality assurance, and RoHS compliant for hazardous substances<\/span><\/li>\n<\/ul>\n

                                        Product details<\/h2>\n
                                        \n
                                          \n
                                        • Product Dimensions \u200f : \u200e\u00a0<\/span>3 x 2.3 x 1.8 inches; 2.4 ounces<\/span><\/li>\n
                                        • Item model number \u200f : \u200e\u00a0<\/span>reles estado solido<\/span><\/li>\n<\/ul>\n<\/div>\n","protected":false},"featured_media":281,"comment_status":"open","ping_status":"closed","template":"","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":""},"product_brand":[33],"product_cat":[27],"product_tag":[28,36,37],"class_list":{"0":"post-280","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-omron","7":"product_cat-omron","8":"product_tag-omron","9":"product_tag-plcautomation","10":"product_tag-plcautomations","12":"first","13":"instock","14":"shipping-taxable","15":"product-type-external"},"yoast_head":"\nOmron G3NA-225B DC5-24 Solid State Relay, Zero Cross Function, Yellow Indicator, Phototriac Coupler Isolation, 25 A Rated Load Current, 24 to 240 VAC Rated Load Voltage, 5 to 24 VDC Input Voltage OMRON Automation and 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