{"id":353,"date":"2025-08-08T08:58:00","date_gmt":"2025-08-08T08:58:00","guid":{"rendered":"https:\/\/plcautomations.com\/products\/?post_type=product&p=353"},"modified":"2025-08-08T08:58:02","modified_gmt":"2025-08-08T08:58:02","slug":"omron-g3na-220b-utu-dc5-24-solid-state-relay-vde-certified-model-zero-cross-function-yellow-indicator-phototriac-coupler-isolation-20-a-rated-load-current-24-to-240-vac-rated-load-voltage-5-to","status":"publish","type":"product","link":"https:\/\/plcautomations.com\/products\/product\/omron-g3na-220b-utu-dc5-24-solid-state-relay-vde-certified-model-zero-cross-function-yellow-indicator-phototriac-coupler-isolation-20-a-rated-load-current-24-to-240-vac-rated-load-voltage-5-to\/","title":{"rendered":"Omron G3NA-220B-UTU DC5-24 Solid State Relay, VDE Certified Model, Zero Cross Function, Yellow Indicator, Phototriac Coupler Isolation, 20 A Rated Load Current, 24 to 240 VAC Rated Load Voltage, 5 to 24 VDC Input Voltage OMRON Automation and Safety"},"content":{"rendered":"

Here\u2019s a detailed Pros and Cons Q&A<\/strong> for the Omron G3NA-220B-UTU<\/strong> Solid State Relay:<\/p>\n

\n

\ud83d\udd27 Product Overview:<\/strong><\/h3>\n
    \n
  • Model<\/strong>: Omron G3NA-220B-UTU<\/strong><\/li>\n
  • Type<\/strong>: Solid State Relay (SSR)<\/strong><\/li>\n
  • Load Voltage<\/strong>: 24\u2013240 VAC<\/strong><\/li>\n
  • Load Current<\/strong>: 20 A (AC)<\/strong><\/li>\n
  • Input Control Voltage<\/strong>: 5\u201324 VDC<\/strong><\/li>\n
  • Control Method<\/strong>: Zero-crossing switching<\/strong><\/li>\n
  • Isolation<\/strong>: Phototriac coupler (optical isolation)<\/strong><\/li>\n
  • Indicator<\/strong>: Yellow LED (shows input status)<\/strong><\/li>\n
  • Mounting<\/strong>: Panel mount with heatsink (recommended)<\/strong><\/li>\n
  • Certifications<\/strong>: VDE Certified (German safety standard)<\/strong><\/li>\n<\/ul>\n
    \n

    \u2705 Pros:<\/strong><\/h3>\n
      \n
    1. Long Life & High Reliability (No Mechanical Contacts)<\/strong>\n
        \n
      • No moving parts<\/strong> = no wear<\/strong>. Ideal for high-frequency switching<\/strong> and long-term reliability, especially in industrial automation<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
      • Zero-Cross Function = Reduced Electrical Noise<\/strong>\n
          \n
        • Switching occurs when the AC load voltage crosses zero, minimizing inrush currents<\/strong> and EMI<\/strong>, which protects other components in the circuit.<\/li>\n<\/ul>\n<\/li>\n
        • Wide Input Voltage Range (5\u201324 VDC)<\/strong>\n
            \n
          • Flexible control using standard DC logic signals<\/strong> from PLCs, microcontrollers, or manual switches\u2014no extra interface needed<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
          • High Current Capacity (20 A)<\/strong>\n
              \n
            • Handles moderate-to-high AC loads<\/strong>, such as heaters, motors, solenoids, or lights, within its rated current and voltage range.<\/li>\n<\/ul>\n<\/li>\n
            • Clear LED Status Indicator<\/strong>\n
                \n
              • A yellow LED<\/strong> indicates when the input control signal is active\u2014makes diagnostics and installation verification<\/strong> simple.<\/li>\n<\/ul>\n<\/li>\n
              • Phototriac Isolation = Excellent Input\/Output Separation<\/strong>\n
                  \n
                • Ensures high dielectric strength<\/strong> and electrical safety, ideal in industrial or noisy environments<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
                • Silent Operation<\/strong>\n
                    \n
                  • Unlike electromechanical relays, SSRs are completely silent<\/strong>, making them ideal for environments where noise is undesirable<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
                  • Certified for Safety (VDE)<\/strong>\n
                      \n
                    • Meets strict German electrical safety standards<\/strong>, useful in regulated industries like medical, food, and EU manufacturing<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
                      \n

                      \u274c Cons:<\/strong><\/h3>\n
                        \n
                      1. Requires Heatsink for Full Load Operation<\/strong>\n
                          \n
                        • At 20 A<\/strong>, external heatsinking<\/strong> is essential to prevent overheating\u2014failure to do so will reduce life or cause failure.<\/li>\n<\/ul>\n<\/li>\n
                        • No Built-in Overload or Short Circuit Protection<\/strong>\n
                            \n
                          • SSRs are less tolerant of overcurrent<\/strong> compared to mechanical relays. External fuses or circuit breakers<\/strong> are strongly recommended.<\/li>\n<\/ul>\n<\/li>\n
                          • Higher Cost than Mechanical Relays<\/strong>\n
                              \n
                            • SSRs are more expensive upfront, especially for higher-current models like this one. Not always cost-effective for low-duty applications<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
                            • Leakage Current on Output (Typically a few mA)<\/strong>\n
                                \n
                              • SSRs have a small leakage current<\/strong> even when “off”\u2014may cause issues with very sensitive or low-current loads<\/strong> unless properly managed.<\/li>\n<\/ul>\n<\/li>\n
                              • One-Way Control (AC Output Only)<\/strong>\n
                                  \n
                                • Only works with AC loads<\/strong>\u2014not suitable for DC load switching<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
                                • Fixed Output Type (No Form C Switching)<\/strong>\n
                                    \n
                                  • SSRs like this model are single-pole (SPST-NO)<\/strong> only\u2014no switching between two outputs<\/strong>, which some electromechanical relays offer.<\/li>\n<\/ul>\n<\/li>\n
                                  • Sensitive to Surge\/Overvoltage Conditions<\/strong>\n
                                      \n
                                    • Needs transient voltage suppression (TVS)<\/strong> or MOVs<\/strong> for protection if installed in environments with frequent voltage spikes<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
                                      \n

                                      \u2753 Q&A \u2013 Practical Use Considerations<\/strong><\/h3>\n

                                      Q1: Can this relay control a heater directly from a PLC?<\/strong>
                                      \n\ud83d\udd39 Yes<\/strong>, if the PLC can supply 5\u201324 VDC<\/strong> at a few mA. You can use a PLC digital output<\/strong> to turn the SSR on\/off and control an AC heater<\/strong> (within 20 A).<\/p>\n

                                      \n

                                      Q2: Does it need a heatsink?<\/strong>
                                      \n\ud83d\udd39 Yes<\/strong>, especially when switching loads above 5\u201310 A<\/strong> continuously. Omron provides thermal derating charts<\/strong>\u2014at 20 A, a properly sized aluminum heatsink<\/strong> is essential.<\/p>\n

                                      \n

                                      Q3: Is this relay bi-directional?<\/strong>
                                      \n\ud83d\udd39 No<\/strong>\u2014the AC output<\/strong> can handle current in both directions (typical for AC), but it only turns on<\/strong> when triggered by a DC input<\/strong> (5\u201324 VDC).<\/p>\n

                                      \n

                                      Q4: Can it replace a mechanical relay?<\/strong>
                                      \n\ud83d\udd39 In many cases, yes<\/strong>, especially where silent, fast switching<\/strong> and long life<\/strong> are needed. But it lacks contact flexibility<\/strong> (e.g., no NC contact) and manual override<\/strong>.<\/p>\n

                                      \n

                                      Q5: Can it be used without a heatsink for short-duty cycles?<\/strong>
                                      \n\ud83d\udd39 Possibly, but only for low current (<5\u20136 A)<\/strong> or intermittent use<\/strong>. Continuous use without a heatsink will quickly overheat<\/strong> the device.<\/p>\n

                                      \n

                                      \ud83e\udde9 Ideal Applications:<\/strong><\/h3>\n
                                        \n
                                      • Heater control in industrial ovens or extruders<\/strong><\/li>\n
                                      • AC motor switching (within rated specs)<\/strong><\/li>\n
                                      • Lighting automation (industrial or stage lighting)<\/strong><\/li>\n
                                      • Pump control in quiet or harsh environments<\/strong><\/li>\n
                                      • Fan speed or cycle control (with phase angle circuit)<\/strong><\/li>\n
                                      • PLC-controlled switching where mechanical wear is a concern<\/strong><\/li>\n<\/ul>\n
                                        \n

                                        \u2705 Summary:<\/strong><\/h3>\n

                                        The Omron G3NA-220B-UTU<\/strong> is a rugged, zero-cross solid state relay<\/strong> built for quiet, reliable, and high-frequency AC switching<\/strong>. It\u2019s ideal for controlling resistive loads like heaters or lamps<\/strong> via low-voltage DC signals<\/strong>, with optical isolation<\/strong> and built-in surge suppression<\/strong> via diode coupling.<\/p>\n

                                        Just be aware: it requires a heatsink<\/strong> for full-capacity loads, lacks built-in protections<\/strong>, and can\u2019t switch DC loads<\/strong>. For its class, though, it delivers excellent industrial-grade performance<\/strong>.<\/p>\n

                                        \n

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

                                        \n
                                        \n\n\n\n\n\n\n\n
                                        Contact Type<\/span><\/td>\nSpst<\/span><\/td>\n<\/tr>\n
                                        Current Rating<\/span><\/td>\n20 Amps<\/span><\/td>\n<\/tr>\n
                                        Mounting Type<\/span><\/td>\nSurface Mount<\/span><\/td>\n<\/tr>\n
                                        Brand<\/span><\/td>\nOmron<\/span><\/td>\n<\/tr>\n
                                        Operation Mode<\/span><\/td>\nAutomatic<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                                        <\/div>\n
                                        <\/div>\n
                                        \n
                                        \n
                                        \n

                                        About this item<\/h1>\n
                                          \n
                                        • AC Ouput Relays with 75-A and 90-A output added<\/span><\/li>\n
                                        • All models feature a uniform mounting pitch<\/span><\/li>\n
                                        • Built-in Varistor effectively absorbs external surges<\/span><\/li>\n
                                        • Operation indicator enable monitoring operation<\/span><\/li>\n
                                        • Standard Models certified by UL and CSA and UTU models by VDE<\/span><\/li>\n<\/ul>\n
                                          \n

                                          Product details<\/h2>\n
                                          \n
                                            \n
                                          • Product Dimensions \u200f : \u200e\u00a0<\/span>3 x 2 x 3 inches; 1.6 ounces<\/span><\/li>\n
                                          • Item model number \u200f : \u200e\u00a0<\/span>reles estado solido<\/span><\/li>\n<\/ul>\n

                                            Product Description<\/h2>\n
                                            \n

                                            1 AMP, 1-POLE, 24-240 VAC, SCREW MOUNTING, SOLID STATE RELAY, SURFACE MOUNTING, ZERO CROSSING; Part Number: G3NA-220B-UTU DC5-24; Category: Panel Accessories; Subcategory: Relay\/Socket<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"featured_media":354,"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-353","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-220B-UTU DC5-24 Solid State Relay, VDE Certified Model, Zero Cross Function, 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