{"id":371,"date":"2025-08-13T08:14:35","date_gmt":"2025-08-13T08:14:35","guid":{"rendered":"https:\/\/plcautomations.com\/products\/?post_type=product&p=371"},"modified":"2025-08-13T08:14:36","modified_gmt":"2025-08-13T08:14:36","slug":"omron-g2rv-1-s-dc21-slim-relay-plug-in-terminal-21-dc-load-voltage-omron-automation-and-safety","status":"publish","type":"product","link":"https:\/\/plcautomations.com\/products\/product\/omron-g2rv-1-s-dc21-slim-relay-plug-in-terminal-21-dc-load-voltage-omron-automation-and-safety\/","title":{"rendered":"Omron G2RV-1-S DC21 Slim Relay, Plug-In Terminal, 21 DC Load Voltage OMRON Automation and Safety"},"content":{"rendered":"

Here\u2019s a detailed Pros and Cons Q&A<\/strong> for the Omron G2RV-1-S DC21 Slim Relay<\/strong> \u2014 a plug-in style, slim-profile industrial relay designed for 21\u202fV\u202fDC control voltage and compact panel installations.<\/p>\n

\n

\u2705 Pros<\/strong><\/h2>\n

1. Slim Design (6.2 mm Width)<\/strong><\/h3>\n
    \n
  • Space-saving profile<\/strong> ideal for high-density control panels or compact enclosures.<\/li>\n
  • Helps reduce cabinet size and improve layout efficiency.<\/li>\n<\/ul>\n

    2. Plug-In Terminal Format<\/strong><\/h3>\n
      \n
    • Easy replacement and maintenance \u2014 relay can be swapped without rewiring.<\/li>\n
    • Compatible with screw or push-in terminal sockets<\/strong>.<\/li>\n<\/ul>\n

      3. Transparent Housing<\/strong><\/h3>\n
        \n
      • The relay’s clear body allows visual inspection<\/strong> of internal contacts and operation.<\/li>\n
      • Aids in diagnostics and manual verification.<\/li>\n<\/ul>\n

        4. Integrated LED Indicator<\/strong><\/h3>\n
          \n
        • Built-in coil status LED<\/strong> shows when the relay is energized \u2014 useful for troubleshooting and confirmation.<\/li>\n<\/ul>\n

          5. Wide Use in Industrial Automation<\/strong><\/h3>\n
            \n
          • Suitable for signal switching, PLC outputs, small actuators, and control logic<\/strong>.<\/li>\n
          • Often used in DIN rail-mounted relay banks<\/strong>.<\/li>\n<\/ul>\n

            6. DC21 Coil Voltage<\/strong><\/h3>\n
              \n
            • 21\u202fV\u202fDC coil voltage is ideal for low-voltage DC logic circuits<\/strong>, including PLC or microcontroller outputs.<\/li>\n<\/ul>\n

              7. Good Electrical Isolation<\/strong><\/h3>\n
                \n
              • Provides reliable galvanic separation<\/strong> between control and load sides.<\/li>\n<\/ul>\n
                \n

                \u274c Cons<\/strong><\/h2>\n

                1. Lower Power Handling<\/strong><\/h3>\n
                  \n
                • Not designed for high-power switching \u2014 typically handles up to 6A<\/strong> depending on the load type.<\/li>\n
                • Not suitable for motors, heavy heaters, or high inrush devices.<\/strong><\/li>\n<\/ul>\n

                  2. Narrow Operating Voltage<\/strong><\/h3>\n
                    \n
                  • Coil is rated specifically for 21\u202fV\u202fDC<\/strong> \u2014 little tolerance for voltage variation, so regulated supply is required.<\/li>\n<\/ul>\n

                    3. Requires Socket for Use<\/strong><\/h3>\n
                      \n
                    • Cannot be directly PCB-mounted \u2014 must be used with a compatible G2RV socket<\/strong>, which adds to system cost and space.<\/li>\n<\/ul>\n

                      4. Mechanical Contact Wear<\/strong><\/h3>\n
                        \n
                      • As an electromechanical relay, it is subject to contact wear<\/strong> over time, especially under frequent switching.<\/li>\n<\/ul>\n

                        5. Limited Environmental Durability<\/strong><\/h3>\n
                          \n
                        • No built-in sealing or protection<\/strong> against dust\/moisture \u2014 unsuitable for harsh environments without enclosure.<\/li>\n<\/ul>\n
                          \n

                          \u2753 Q&A<\/strong><\/h2>\n

                          Q: What is the coil voltage of this relay?<\/strong><\/h3>\n

                          A:<\/strong> It is rated for 21\u202fV\u202fDC<\/strong>, which must be supplied by a stable DC power source.<\/p>\n

                          \n

                          Q: Can I mount this relay on a DIN rail?<\/strong><\/h3>\n

                          A:<\/strong> Yes \u2014 when used with the appropriate DIN rail socket (e.g., P2RV series)<\/strong>, it can be easily DIN rail mounted.<\/p>\n

                          \n

                          Q: Does the relay have any indication features?<\/strong><\/h3>\n

                          A:<\/strong> Yes, it includes a built-in LED<\/strong> that lights up when the coil is energized.<\/p>\n

                          \n

                          Q: Can this relay switch AC loads?<\/strong><\/h3>\n

                          A:<\/strong> Yes, but only low-power AC loads<\/strong> \u2014 be sure to check the contact ratings and use arc suppression if necessary.<\/p>\n

                          \n

                          Q: What are common applications?<\/strong><\/h3>\n

                          A:<\/strong> Widely used in PLC output interfacing<\/strong>, signal relaying<\/strong>, light-duty load switching<\/strong>, and panel automation systems<\/strong>.<\/p>\n

                          \n

                          \ud83e\uddfe Summary<\/strong><\/h2>\n\n\n\n\n\n\n\n\n\n\n
                          Feature<\/th>\nRating<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
                          Size & Space Efficiency<\/td>\n\u2605\u2605\u2605\u2605\u2605<\/td>\nExtremely slim \u2014 excellent for dense installations<\/td>\n<\/tr>\n
                          Ease of Replacement<\/td>\n\u2605\u2605\u2605\u2605\u2605<\/td>\nPlug-in style with LED indicator<\/td>\n<\/tr>\n
                          Load Capacity<\/td>\n\u2605\u2605\u2605\u2606\u2606<\/td>\nGood for signals and light loads only<\/td>\n<\/tr>\n
                          Coil Voltage Flexibility<\/td>\n\u2605\u2605\u2606\u2606\u2606<\/td>\n21\u202fV\u202fDC only \u2014 no AC or wide DC support<\/td>\n<\/tr>\n
                          Mounting Versatility<\/td>\n\u2605\u2605\u2605\u2605\u2606<\/td>\nRequires compatible socket for DIN or panel mount<\/td>\n<\/tr>\n
                          Diagnostics & Visibility<\/td>\n\u2605\u2605\u2605\u2605\u2605<\/td>\nLED + transparent case aid troubleshooting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
                          \n

                          The Omron G2RV-1-S DC21<\/strong> is a compact, user-friendly signal relay<\/strong> perfect for tight-space control cabinets, automation panels<\/strong>, and PLC output interfacing<\/strong>. It offers easy diagnostics and clean wiring, but it\u2019s best reserved for low-power, non-inductive loads<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

                          \n
                          \n\n\n\n\n\n\n\n
                          Connector Type<\/span><\/td>\nPlug-In<\/span><\/td>\n<\/tr>\n
                          Contact Material<\/span><\/td>\nSilver<\/span><\/td>\n<\/tr>\n
                          Contact Type<\/span><\/td>\nNormally Open<\/span><\/td>\n<\/tr>\n
                          Current Rating<\/span><\/td>\n2 Amps<\/span><\/td>\n<\/tr>\n
                          Mounting Type<\/span><\/td>\nPlug In Mount<\/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
                          • Electric relay for receiving and controlling electric signals in low current applications<\/span><\/li>\n
                          • Large plug-in terminals for secure connection<\/span><\/li>\n
                          • SPDT for simple change-over switching<\/span><\/li>\n
                          • Replacement relay for G2RV-SL7 series Relay and Socket combination<\/span><\/li>\n
                          • UL recognized for safety, VDE and CE certified for quality assurance<\/span><\/li>\n<\/ul>\n

                            Product details<\/h2>\n
                            \n
                              \n
                            • Product Dimensions \u200f : \u200e\u00a0<\/span>0.08 x 0.08 x 0.04 inches; 1.27 ounces<\/span><\/li>\n
                            • Item model number \u200f : \u200e\u00a0<\/span>reles industriales<\/span><\/li>\n<\/ul>\n

                              Product Description<\/h2>\n
                              \n

                               <\/p>\n

                              This Omron G2RV-1-S DC21 slim relay has plug-in terminals for a socket connection, single pole double throw (SPDT) contacts, and is suitable for use with low voltage applications. This relay has an input current rating of 13.3 mA with a maximum load rating of 30VDC at 6 amp, and input of 21VDC. It has a slim design for saving space on a panel and large plug-in terminals for a secure connection. This relay is the replacement relay for the G2RV-SL7 series of relay and socket combinations and is suitable for use in HVAC, appliance, and security applications.<\/p>\n

                              Specifications<\/h5>\n

                              Contact FormSPDTInput Current Rating13.3 mAInput Voltage21VDCLoad Rating400VAC, 2 amp
                              \n250VAC, 6 amp
                              \n30VDC, 6 ampMaximum Switching Voltage440VAC, 125VDCOperating Temperature-40 to +55 degrees CEnclosure TypeSealedEnclosure Dimensions*33 x 5.2 x 30.5mm (H x W x D)Standards MetUL (Underwriter’s Laboratories)
                              \nCE (European Conformity)
                              \nVDE (Electrical, Electronic & Information Technologies)
                              \n*H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.<\/p>\n

                              Relay switches (also called an electrical relay or an electrical relay switch) use a small amount of power to control a larger source of power connected to electrical devices such as car motors, computers, and lighting installations. A basic relay switch has a control circuit with an electromagnetic coil and a load circuit with contacts and a lever. When current flows into the relay switch, it moves through the coil and a magnetic field is created, which causes the lever in the load circuit to move between contacts, either turning the device on or off. In a normally open (NO) relay switch, when power is supplied to the relay, the load circuit is closed and the power source connected to the relay is turned on. In a normally closed (NC) relay switch, when power is supplied to the relay, the load circuit is open and the power source connected to the relay is turned off. In other types of relay switches, non-moving parts such as transistors or semiconductors can be used as the control circuit to operate the switching mechanism. Relay switches can be controlled with an external switch, such as a light switch, or they can be connected to an automatically switched power source, such as a car ignition. One relay can operate multiple switches, and multiple relays can be operated with a single switch, with each relay operating independently from the other relays in the system.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"featured_media":372,"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-371","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 G2RV-1-S DC21 Slim Relay, Plug-In Terminal, 21 DC Load Voltage OMRON Automation and Safety - Products<\/title>\n<meta name=\"description\" content=\"Omron G2RV-1-S DC21 Slim Relay, Plug-In Terminal, 21 DC Load Voltage OMRON Automation and Safety Here\u2019s a detailed Pros and Cons Q&A for the Omron G2RV-1-S DC21 Slim Relay \u2014 a plug-in style, slim-profile industrial relay designed for 21\u202fV\u202fDC control voltage and compact panel installations.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/plcautomations.com\/products\/product\/omron-g2rv-1-s-dc21-slim-relay-plug-in-terminal-21-dc-load-voltage-omron-automation-and-safety\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Omron G2RV-1-S DC21 Slim Relay, Plug-In Terminal, 21 DC Load Voltage OMRON Automation and Safety - 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