{"id":9525,"date":"2026-04-08T11:32:35","date_gmt":"2026-04-08T09:32:35","guid":{"rendered":"https:\/\/flash-electric.com\/Flash\/?post_type=product&#038;p=9525"},"modified":"2026-04-08T11:34:12","modified_gmt":"2026-04-08T09:34:12","slug":"3rv1021-1ca15-siemens","status":"publish","type":"product","link":"https:\/\/flash-electric.com\/Flash\/product\/3rv1021-1ca15-siemens\/","title":{"rendered":"Siemens 3RV1021-1CA15 SIRIUS Motor Protection Circuit Breaker"},"content":{"rendered":"<h2>3RV1021-1CA15 Siemens Overview<\/h2>\n<p><strong>3RV1021-1CA15 Siemens<\/strong> is a SIRIUS motor protection circuit breaker designed for dependable motor protection in industrial automation and motor control systems. This device helps protect motors against overload and short-circuit conditions, making it an essential component in electrical control panels and machine starter circuits.<\/p>\n<p>Siemens designed this breaker in <strong>size S0<\/strong> with an adjustable current range of <strong>1.8 to 2.5 A<\/strong>. In addition, it features <strong>Trip Class 10<\/strong> performance and a <strong>33 A short-circuit release<\/strong>, which provides reliable protection for small motors and industrial loads. The unit also includes <strong>screw terminals<\/strong> for secure installation and a <strong>transverse auxiliary switch (1 NO + 1 NC)<\/strong> for signaling and control circuit integration.<\/p>\n<h2>Key Features of 3RV1021-1CA15 Siemens<\/h2>\n<ul>\n<li>SIRIUS motor protection circuit breaker<\/li>\n<li>Size S0 compact design<\/li>\n<li>Adjustable current range: 1.8 to 2.5 A<\/li>\n<li>Trip Class 10 motor protection<\/li>\n<li>Short-circuit release: 33 A<\/li>\n<li>Integrated auxiliary contacts: 1 NO + 1 NC<\/li>\n<li>Screw terminal connection<\/li>\n<li>Suitable for industrial motor control panels<\/li>\n<\/ul>\n<h2>Applications of 3RV1021-1CA15 Siemens<\/h2>\n<p>Engineers use <strong>3RV1021-1CA15 Siemens<\/strong> in motor starter panels, machine automation systems, pumps, fans, conveyors, compressors, and industrial control cabinets. For example, it can protect small motors from overload and fault conditions while also helping simplify manual switching and motor isolation inside the panel.<\/p>\n<p>Because this device combines motor protection and switching functions in one compact unit, it helps reduce panel space and improves maintenance convenience. .<\/p>\n<h2>Technical Specifications of 3RV1021-1CA15 Siemens<\/h2>\n<ul>\n<li><strong>Brand:<\/strong> Siemens<\/li>\n<li><strong>Part Number:<\/strong> 3RV1021-1CA15<\/li>\n<li><strong>Series:<\/strong> SIRIUS<\/li>\n<li><strong>Product Type:<\/strong> Motor Protection Circuit Breaker<\/li>\n<li><strong>Size:<\/strong> S0<\/li>\n<li><strong>Current Setting Range:<\/strong> 1.8 to 2.5 A<\/li>\n<li><strong>Trip Class:<\/strong> Class 10<\/li>\n<li><strong>Short-Circuit Release:<\/strong> 33 A<\/li>\n<li><strong>Auxiliary Contacts:<\/strong> 1 NO + 1 NC<\/li>\n<li><strong>Terminal Type:<\/strong> Screw terminals<\/li>\n<\/ul>\n<h2>Why Choose 3RV1021-1CA15 Siemens?<\/h2>\n<p>This Siemens SIRIUS breaker gives engineers a practical and reliable solution for protecting small motors in industrial systems. Therefore, it is a strong choice for panel builders, maintenance engineers, and automation professionals who need dependable overload protection and trusted Siemens quality.<\/p>\n<h2>References &#038; Documentation<\/h2>\n<p>For official Siemens manuals and datasheets, visit <a href=\"https:\/\/support.industry.siemens.com\/\" target=\"_blank\" rel=\"noopener\">Siemens Industry Support<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Siemens 3RV1021-1CA15 is a SIRIUS motor protection circuit breaker designed for reliable overload and short-circuit protection in industrial motor control applications. It features size S0 construction, 1.8\u20132.5A adjustable current range, Class 10 tripping, screw terminals, and integrated 1NO+1NC auxiliary contacts.<\/p>\n","protected":false},"featured_media":9526,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[100],"product_cat":[91],"product_tag":[248,243,247,129,246,244,245,102,236],"class_list":{"0":"post-9525","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-siemens","7":"product_cat-siemens","8":"product_tag-1-8-2-5a","9":"product_tag-3rv1021-1ca15","10":"product_tag-class-10","11":"product_tag-industrial-automation","12":"product_tag-manual-motor-starter","13":"product_tag-motor-protection-circuit-breaker","14":"product_tag-mpcb","15":"product_tag-siemens","16":"product_tag-sirius","17":"desktop-align-center","18":"tablet-align-center","19":"mobile-align-center","21":"first","22":"instock","23":"taxable","24":"shipping-taxable","25":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Siemens 3RV1021-1CA15 SIRIUS Motor Protection Circuit Breaker - Flash Electric<\/title>\n<meta name=\"description\" content=\"Buy 3RV1021-1CA15 Siemens motor protection circuit breaker. S0 size, 1.8\u20132.5A adjustable range, Class 10, 1NO+1NC, screw terminals.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/flash-electric.com\/Flash\/product\/3rv1021-1ca15-siemens\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Siemens 3RV1021-1CA15 SIRIUS Motor Protection Circuit Breaker - Flash Electric\" \/>\n<meta property=\"og:description\" content=\"Buy 3RV1021-1CA15 Siemens motor protection circuit breaker. S0 size, 1.8\u20132.5A adjustable range, Class 10, 1NO+1NC, screw terminals.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/flash-electric.com\/Flash\/product\/3rv1021-1ca15-siemens\/\" \/>\n<meta property=\"og:site_name\" content=\"Flash Electric\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-08T09:34:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/flash-electric.com\/Flash\/wp-content\/uploads\/2026\/04\/3RV10211CA15.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/flash-electric.com\\\/Flash\\\/product\\\/3rv1021-1ca15-siemens\\\/\",\"url\":\"https:\\\/\\\/flash-electric.com\\\/Flash\\\/product\\\/3rv1021-1ca15-siemens\\\/\",\"name\":\"Siemens 3RV1021-1CA15 SIRIUS Motor Protection Circuit Breaker - Flash Electric\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/flash-electric.com\\\/Flash\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/flash-electric.com\\\/Flash\\\/product\\\/3rv1021-1ca15-siemens\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/flash-electric.com\\\/Flash\\\/product\\\/3rv1021-1ca15-siemens\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/flash-electric.com\\\/Flash\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/3RV10211CA15.jpg\",\"datePublished\":\"2026-04-08T09:32:35+00:00\",\"dateModified\":\"2026-04-08T09:34:12+00:00\",\"description\":\"Buy 3RV1021-1CA15 Siemens motor protection circuit breaker. 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