{"id":278,"date":"2025-08-06T04:05:25","date_gmt":"2025-08-06T04:05:25","guid":{"rendered":"https:\/\/plcautomations.com\/products\/?post_type=product&#038;p=278"},"modified":"2025-08-08T07:38:43","modified_gmt":"2025-08-08T07:38:43","slug":"omron-g7l-1a-tub-cb-ac100-120-general-purpose-relay-class-b-insulation-quickconnect-terminal-upper-bracket-mounting-spst-no-contacts-30a-250v-omron-automation-and-safety","status":"publish","type":"product","link":"https:\/\/plcautomations.com\/products\/product\/omron-g7l-1a-tub-cb-ac100-120-general-purpose-relay-class-b-insulation-quickconnect-terminal-upper-bracket-mounting-spst-no-contacts-30a-250v-omron-automation-and-safety\/","title":{"rendered":"Omron G7L-1A-TUB-CB-AC100\/120 General Purpose Relay, Class B Insulation, QuickConnect Terminal, Upper Bracket Mounting, SPST-NO Contacts, 30A, 250V OMRON Automation and Safety"},"content":{"rendered":"<p>The <strong>Omron G7L-1A-TUB-CB-AC100\/120<\/strong> is a <strong>general-purpose relay<\/strong> designed for industrial automation and control systems. It features <strong>SPST-NO contacts<\/strong>, <strong>30A current rating<\/strong>, and operates at <strong>250V AC<\/strong>. The relay is also equipped with <strong>Class B insulation<\/strong>, <strong>QuickConnect terminals<\/strong>, and <strong>upper bracket mounting<\/strong> for easy integration into control panels. This relay is particularly suited for high-current switching applications, including controlling motors, lighting, and heating systems.<\/p>\n<hr \/>\n<h3><strong>Pros of the Omron G7L-1A-TUB-CB-AC100\/120 Relay<\/strong><\/h3>\n<ol>\n<li><strong>High Current Rating (30A)<\/strong>:\n<ul>\n<li>With a <strong>30A<\/strong> current rating, the <strong>G7L-1A-TUB-CB-AC100\/120<\/strong> relay is capable of handling <strong>high-power loads<\/strong>, making it suitable for industrial machinery, HVAC systems, motor control, and large-scale automation systems.<\/li>\n<\/ul>\n<\/li>\n<li><strong>SPST-NO (Single Pole Single Throw, Normally Open) Contacts<\/strong>:\n<ul>\n<li>The <strong>SPST-NO contacts<\/strong> provide reliable switching for applications requiring the opening and closing of a single circuit, typically used for controlling simple devices like motors, lights, and heaters.<\/li>\n<li><strong>NO contacts<\/strong> allow the relay to only complete the circuit when it is energized, which is ideal for on-off control functions.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Class B Insulation<\/strong>:\n<ul>\n<li>The <strong>Class B insulation<\/strong> ensures the relay can operate reliably in environments where <strong>temperature ranges<\/strong> of up to <strong>130\u00b0C (266\u00b0F)<\/strong> are present. This makes it suitable for use in high-temperature settings like industrial plants, HVAC systems, and motor control panels.<\/li>\n<\/ul>\n<\/li>\n<li><strong>QuickConnect Terminal Design<\/strong>:\n<ul>\n<li>The <strong>QuickConnect terminals<\/strong> allow for fast and easy wiring, reducing installation time and making it easier to integrate the relay into existing systems. This feature improves efficiency and reliability during both installation and maintenance.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Upper Bracket Mounting<\/strong>:\n<ul>\n<li>The <strong>upper bracket mounting<\/strong> provides a secure and stable installation. It simplifies the mounting process in electrical enclosures or on DIN rails, ensuring the relay stays in place during operations. This makes it easier to organize and position relays in control panels, improving system ergonomics.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Versatile Voltage Operation (AC 100-120V)<\/strong>:\n<ul>\n<li>This relay operates at <strong>AC100\/120V<\/strong>, which is commonly used in many industrial and automation applications, especially in North America. Its wide compatibility ensures it works with standard electrical systems, which is convenient for widespread use.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Compact and Durable Design<\/strong>:\n<ul>\n<li>The <strong>compact design<\/strong> of the relay allows for easy integration into control panels where space may be limited, without compromising its strength and reliability.<\/li>\n<li><strong>Durability<\/strong> is a key feature of the G7L series, ensuring that the relay can withstand the wear and tear of industrial environments.<\/li>\n<\/ul>\n<\/li>\n<li><strong>High Reliability and Long Lifecycle<\/strong>:\n<ul>\n<li>Omron is known for the <strong>reliability<\/strong> of its components. The <strong>G7L-1A-TUB-CB<\/strong> is built to handle frequent switching and has a long operational life. This makes it an excellent choice for industries that rely on continuous operations without frequent relay replacements.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<h3><strong>Cons of the Omron G7L-1A-TUB-CB-AC100\/120 Relay<\/strong><\/h3>\n<ol>\n<li><strong>Limited Contact Configuration (SPST-NO)<\/strong>:\n<ul>\n<li>The <strong>SPST-NO configuration<\/strong> may be limiting for applications that require more complex switching functions (such as <strong>DPDT<\/strong> or <strong>SPDT<\/strong> relays). If your application needs to control multiple circuits simultaneously or requires both normally open and normally closed contacts, this relay may not be the ideal choice.<\/li>\n<\/ul>\n<\/li>\n<li><strong>AC Voltage Only (No DC Operation)<\/strong>:\n<ul>\n<li>The <strong>G7L-1A-TUB-CB-AC100\/120<\/strong> relay is designed for <strong>AC operation only<\/strong> (100\/120V AC). It cannot be used for DC-based circuits, limiting its flexibility in applications that require <strong>DC voltage control<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Mechanical Wear Over Time<\/strong>:\n<ul>\n<li>As with most mechanical relays, the <strong>G7L-1A-TUB-CB<\/strong> is subject to <strong>mechanical wear<\/strong> due to frequent switching cycles. While durable, the contacts may degrade after extensive use, especially in high-frequency switching applications. In such cases, a <strong>solid-state relay<\/strong> (SSR) could be a more appropriate solution for longer lifespan and fewer maintenance requirements.<\/li>\n<\/ul>\n<\/li>\n<li><strong>No Integrated Feedback or Monitoring<\/strong>:\n<ul>\n<li>The <strong>G7L-1A-TUB-CB<\/strong> relay does not include any built-in <strong>diagnostic or feedback capabilities<\/strong>. If your system requires real-time monitoring, health diagnostics, or feedback loops for control, you would need to pair this relay with other devices or incorporate external monitoring components.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Not Ideal for Fast Switching<\/strong>:\n<ul>\n<li>The relay may not be suitable for applications requiring <strong>fast switching<\/strong> speeds, as mechanical relays tend to have slower response times compared to <strong>solid-state relays<\/strong>. If you need to switch loads rapidly (e.g., in high-frequency control applications), this relay may not meet your needs.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Higher Power Consumption Compared to Solid-State Relays<\/strong>:\n<ul>\n<li>Mechanical relays, like the <strong>G7L-1A-TUB-CB<\/strong>, generally consume more power for operation (especially when energized) compared to <strong>solid-state relays<\/strong> (SSRs), which can operate more efficiently with lower power consumption in certain applications.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Limited Protection Features<\/strong>:\n<ul>\n<li>While it has good <strong>Class B insulation<\/strong>, the <strong>G7L-1A-TUB-CB<\/strong> lacks built-in <strong>overcurrent protection<\/strong>, <strong>short-circuit protection<\/strong>, or <strong>surge suppression<\/strong>. In harsh environments where such protection is critical, additional external components may be necessary to prevent damage to the relay or connected equipment.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<h3><strong>Q&amp;A Section<\/strong><\/h3>\n<p><strong>Q: Can the Omron G7L-1A-TUB-CB relay be used for both AC and DC applications?<\/strong><br \/>\nA: No, the <strong>G7L-1A-TUB-CB<\/strong> relay is specifically designed for <strong>AC<\/strong> voltage applications only (100\/120V AC). It cannot be used in <strong>DC circuits<\/strong>. If you need a relay for <strong>DC applications<\/strong>, you should consider an appropriate DC relay.<\/p>\n<p><strong>Q: How does the Omron G7L-1A-TUB-CB compare to solid-state relays?<\/strong><br \/>\nA: The <strong>G7L-1A-TUB-CB<\/strong> is a <strong>mechanical relay<\/strong>, which means it involves physical moving parts for switching. While it\u2019s reliable and robust for many industrial uses, it is <strong>slower<\/strong> than a <strong>solid-state relay<\/strong> (SSR) and will experience <strong>wear over time<\/strong>. SSRs have no moving parts and are better suited for <strong>high-frequency switching<\/strong> or environments that require <strong>minimal maintenance<\/strong>.<\/p>\n<p><strong>Q: What type of applications is the G7L-1A-TUB-CB most suited for?<\/strong><br \/>\nA: The <strong>G7L-1A-TUB-CB<\/strong> is ideal for general-purpose <strong>high-current switching<\/strong> applications. It is commonly used in <strong>motor control<\/strong> circuits, <strong>lighting systems<\/strong>, <strong>heating control<\/strong>, <strong>HVAC systems<\/strong>, and other industrial control systems where reliable, high-current switching is needed.<\/p>\n<p><strong>Q: How do I wire the Omron G7L-1A-TUB-CB relay?<\/strong><br \/>\nA: The <strong>QuickConnect terminals<\/strong> make wiring straightforward. You\u2019ll simply connect the input control signal to the coil terminals and wire your high-power load to the <strong>NO (Normally Open)<\/strong> contact terminals. Ensure that the relay is installed securely using the <strong>upper bracket mounting<\/strong> and that the voltage ratings are adhered to.<\/p>\n<p><strong>Q: What is the lifespan of the Omron G7L-1A-TUB-CB relay?<\/strong><br \/>\nA: The <strong>G7L-1A-TUB-CB<\/strong> is designed for <strong>long-term reliability<\/strong> and can handle numerous switching cycles, but like all mechanical relays, its lifespan depends on the frequency of use. High-frequency switching may lead to <strong>contact wear<\/strong>, reducing the lifespan. In applications with low switching frequency, it can last for many years.<\/p>\n<p><strong>Q: Can this relay be used in a control panel with limited space?<\/strong><br \/>\nA: Yes, the <strong>compact size<\/strong> (22.5mm wide) and <strong>DIN rail mounting<\/strong> make the <strong>G7L-1A-TUB-CB<\/strong> suitable for control panels with limited space. The <strong>QuickConnect terminals<\/strong> further simplify installation in tight spaces.<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<div id=\"productOverview_feature_div\" class=\"celwidget\" data-feature-name=\"productOverview\" data-csa-c-type=\"widget\" data-csa-c-content-id=\"productOverview\" data-csa-c-slot-id=\"productOverview_feature_div\" data-csa-c-asin=\"B0073U6CXY\" data-csa-c-is-in-initial-active-row=\"false\" data-csa-c-id=\"ytxr5w-pg47d2-lh9j9y-p1ck13\" data-cel-widget=\"productOverview_feature_div\">\n<div class=\"a-section a-spacing-small a-spacing-top-small\">\n<table class=\"a-normal a-spacing-micro\">\n<tbody>\n<tr class=\"a-spacing-small po-connector_type\">\n<td class=\"a-span3\"><span class=\"a-size-base a-text-bold\">Connector Type<\/span><\/td>\n<td class=\"a-span9\"><span class=\"a-size-base po-break-word\">Quick Connect<\/span><\/td>\n<\/tr>\n<tr class=\"a-spacing-small po-contact.material\">\n<td class=\"a-span3\"><span class=\"a-size-base a-text-bold\">Contact Material<\/span><\/td>\n<td class=\"a-span9\"><span class=\"a-size-base po-break-word\">Silver Alloy<\/span><\/td>\n<\/tr>\n<tr class=\"a-spacing-small po-contact.type\">\n<td class=\"a-span3\"><span class=\"a-size-base a-text-bold\">Contact Type<\/span><\/td>\n<td class=\"a-span9\"><span class=\"a-size-base po-break-word\">Normally Open<\/span><\/td>\n<\/tr>\n<tr class=\"a-spacing-small po-current_rating\">\n<td class=\"a-span3\"><span class=\"a-size-base a-text-bold\">Current Rating<\/span><\/td>\n<td class=\"a-span9\"><span class=\"a-size-base po-break-word\">30 Amps<\/span><\/td>\n<\/tr>\n<tr class=\"a-spacing-small po-mounting_type\">\n<td class=\"a-span3\"><span class=\"a-size-base a-text-bold\">Mounting Type<\/span><\/td>\n<td class=\"a-span9\"><span class=\"a-size-base po-break-word\">Upper Bracket Mounting<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<div id=\"productDetailsVoyagerIngress_feature_div\" class=\"celwidget\" data-feature-name=\"productDetailsVoyagerIngress\" data-csa-c-type=\"widget\" data-csa-c-content-id=\"productDetailsVoyagerIngress\" data-csa-c-slot-id=\"productDetailsVoyagerIngress_feature_div\" data-csa-c-asin=\"B0073U6CXY\" data-csa-c-is-in-initial-active-row=\"false\" data-csa-c-id=\"gt0a08-a1ty7u-nzt5zz-ezfo8n\" data-cel-widget=\"productDetailsVoyagerIngress_feature_div\"><\/div>\n<div id=\"collectiblesKeyInformation_feature_div\" class=\"celwidget\" data-feature-name=\"collectiblesKeyInformation\" data-csa-c-type=\"widget\" data-csa-c-content-id=\"collectiblesKeyInformation\" data-csa-c-slot-id=\"collectiblesKeyInformation_feature_div\" data-csa-c-asin=\"B0073U6CXY\" data-csa-c-is-in-initial-active-row=\"false\" data-csa-c-id=\"c3ckfb-lgw8td-c5r0yk-96pe2a\" data-cel-widget=\"collectiblesKeyInformation_feature_div\"><\/div>\n<div id=\"featurebullets_feature_div\" class=\"celwidget\" data-feature-name=\"featurebullets\" data-csa-c-type=\"widget\" data-csa-c-content-id=\"featurebullets\" data-csa-c-slot-id=\"featurebullets_feature_div\" data-csa-c-asin=\"B0073U6CXY\" data-csa-c-is-in-initial-active-row=\"false\" data-csa-c-id=\"n6g242-a836fp-xyvi7b-2zndey\" data-cel-widget=\"featurebullets_feature_div\">\n<div id=\"feature-bullets\" class=\"a-section a-spacing-medium a-spacing-top-small\">\n<hr class=\"a-divider-normal\" aria-hidden=\"true\" \/>\n<h1 class=\"a-size-base-plus a-text-bold\">About this item<\/h1>\n<ul class=\"a-unordered-list a-vertical a-spacing-mini\">\n<li class=\"a-spacing-mini\"><span class=\"a-list-item\">Electric relay for controlling electric signals in low current applications<\/span><\/li>\n<li class=\"a-spacing-mini\"><span class=\"a-list-item\">Quick-connect terminal for routing current directly through the contacts<\/span><\/li>\n<li class=\"a-spacing-mini\"><span class=\"a-list-item\">SPST-NO for simple on\/off switching<\/span><\/li>\n<li class=\"a-spacing-mini\"><span class=\"a-list-item\">Insulation meets UL Class B for flame resistant materials<\/span><\/li>\n<li class=\"a-spacing-mini\"><span class=\"a-list-item\">UL recognized for safety and CSA certified for quality assurance<\/span><\/li>\n<\/ul>\n<h2>Product details<\/h2>\n<div id=\"detailBullets_feature_div\">\n<ul class=\"a-unordered-list a-nostyle a-vertical a-spacing-none detail-bullet-list\">\n<li><span class=\"a-list-item\"><span class=\"a-text-bold\">Is Discontinued By Manufacturer \u200f : \u200e\u00a0<\/span>No<\/span><\/li>\n<li><span class=\"a-list-item\"><span class=\"a-text-bold\">Product Dimensions \u200f : \u200e\u00a0<\/span>84 x 72 x 84 inches; 0.71 ounces<\/span><\/li>\n<li><span class=\"a-list-item\"><span class=\"a-text-bold\">Item model number \u200f : \u200e\u00a0<\/span>G7L-1A-TUB-CB-AC100\/120<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"featured_media":279,"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-278","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":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Omron G7L-1A-TUB-CB-AC100\/120 General Purpose Relay, Class B Insulation, QuickConnect Terminal, Upper Bracket Mounting, SPST-NO Contacts, 30A, 250V OMRON Automation and Safety - Products<\/title>\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-g7l-1a-tub-cb-ac100-120-general-purpose-relay-class-b-insulation-quickconnect-terminal-upper-bracket-mounting-spst-no-contacts-30a-250v-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 G7L-1A-TUB-CB-AC100\/120 General Purpose Relay, Class B Insulation, QuickConnect Terminal, Upper Bracket Mounting, SPST-NO Contacts, 30A, 250V OMRON Automation and Safety - Products\" \/>\n<meta property=\"og:description\" content=\"Connector Type Quick Connect   Contact Material Silver Alloy   Contact Type Normally Open   Current Rating 30 Amps   Mounting Type Upper Bracket Mounting             About this item   Electric relay for controlling electric signals in low current applications  Quick-connect terminal for routing current directly through the contacts  SPST-NO for simple on\/off switching  Insulation meets UL Class B for flame resistant materials  UL recognized for safety and CSA certified for quality assurance  Product details    Is Discontinued By Manufacturer \u200f : \u200e\u00a0No  Product Dimensions \u200f : \u200e\u00a084 x 72 x 84 inches; 0.71 ounces  Item model number \u200f : \u200e\u00a0G7L-1A-TUB-CB-AC100\/120\" \/>\n<meta property=\"og:url\" content=\"https:\/\/plcautomations.com\/products\/product\/omron-g7l-1a-tub-cb-ac100-120-general-purpose-relay-class-b-insulation-quickconnect-terminal-upper-bracket-mounting-spst-no-contacts-30a-250v-omron-automation-and-safety\/\" \/>\n<meta property=\"og:site_name\" content=\"Products\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-08T07:38:43+00:00\" \/>\n<meta property=\"og:image\" 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