{"id":7015,"date":"2026-10-24T14:54:22","date_gmt":"2026-10-24T14:54:22","guid":{"rendered":"https:\/\/www.rendatsp.com\/product\/siemens-3rh2911-1ha20-sirius-front-auxiliary-switch-block-2-no-screw-terminal-for-3rt2-3rh2\/"},"modified":"2026-10-24T14:54:22","modified_gmt":"2026-10-24T14:54:22","slug":"siemens-3rh2911-1ha20-sirius-front-auxiliary-switch-block-2-no-screw-terminal-for-3rt2-3rh2","status":"publish","type":"product","link":"https:\/\/www.rendatsp.com\/ar\/product\/siemens-3rh2911-1ha20-sirius-front-auxiliary-switch-block-2-no-screw-terminal-for-3rt2-3rh2\/","title":{"rendered":"Siemens 3RH2911-1HA20 SIRIUS Front Auxiliary Switch Block 2 NO, Screw Terminal, for 3RT2 \/ 3RH2"},"content":{"rendered":"<p>Order number 3RH2911-1HA20 is a genuine Siemens part from the SIRIUS 3RH2 control relays \/ auxiliary switches range. Official description: auxiliary switch, on the front, 2 NO, .3\/.4, .3\/.4, &#8211;\/&#8211;, &#8211;\/&#8211;, current path: 1 NO, 1 NO, &#8211;, &#8211;, screw terminal, for contactors 3RT2 and contactor relays 3RH2.<\/p>\n<p>SIRIUS 3RH2 contactor relays and auxiliary switch blocks are used in control circuits to multiply contacts, interlock starters and interface PLC outputs with higher-power coils.<\/p>\n<p>See our <a href=\"https:\/\/www.rendatsp.com\/ar\/product-category\/siemens\/\">Siemens range<\/a>.<\/p>\n<h3>Technical data<\/h3>\n<table>\n<tbody>\n<tr>\n<th>Siemens order number<\/th>\n<td>3RH2911-1HA20<\/td>\n<\/tr>\n<tr>\n<th>Product type designation<\/th>\n<td>3RH29<\/td>\n<\/tr>\n<tr>\n<th>Ambient temperature (operation)<\/th>\n<td>-25 &#8230; +60 \u00b0C<\/td>\n<\/tr>\n<tr>\n<th>Dimensions (W x H x D)<\/th>\n<td>36 x 37.5 x 43.7 mm<\/td>\n<\/tr>\n<tr>\n<th>Weight, approx.<\/th>\n<td>0.045 kg<\/td>\n<\/tr>\n<tr>\n<th>Condition<\/th>\n<td>New, original Siemens<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Main features<\/h3>\n<ul>\n<li>Auxiliary switch<\/li>\n<li>On the front<\/li>\n<li>2 NO, .3\/.4, .3\/.4, &#8211;\/&#8211;, &#8211;\/&#8211;<\/li>\n<li>Current path: 1 NO<\/li>\n<li>1 NO, &#8211;, &#8212;<\/li>\n<li>Screw terminal<\/li>\n<li>For contactors 3RT2 and contactor relays 3RH2<\/li>\n<\/ul>\n<h3>Typical applications<\/h3>\n<ul>\n<li>Contact multiplication for PLC outputs<\/li>\n<li>Control circuits and interlocking<\/li>\n<li>Signalling and auxiliary functions on 3RT2 contactors<\/li>\n<li>Replacement of a worn relay or block<\/li>\n<\/ul>\n<h3>Compatibility and replacement<\/h3>\n<p>Check the coil voltage (for contactor relays) or the contactor size (for auxiliary blocks) against the old part before ordering.<\/p>\n<h3>Replacement checklist<\/h3>\n<ul>\n<li>Note the firmware version printed on the old unit; TIA Portal or LOGO! Soft Comfort must support it.<\/li>\n<li>Look for signs of overvoltage, water or heat damage in the cabinet so the new part does not fail for the same reason.<\/li>\n<li>Compare the full order number 3RH2911-1HA20 with the label on the old unit, including the last digits (they identify the version).<\/li>\n<\/ul>\n<h3>Frequently asked questions<\/h3>\n<h4>What contacts does it have?<\/h4>\n<p>See the contact arrangement in the Siemens title and table above.<\/p>\n<h4>Does it fit 3RT2 contactors?<\/h4>\n<p>3RH29 auxiliary switch blocks fit 3RT2 contactors of the sizes listed by Siemens in the data sheet.<\/p>\n<h4>Can I get a datasheet?<\/h4>\n<p>The official manufacturer datasheet is the source of the technical data above; we can send the PDF with the quotation on request.<\/p>\n<h4>Is it new and original?<\/h4>\n<p>Yes. We supply new, original parts in the manufacturer packaging, with a 1-year warranty.<\/p>\n<h4>Do you ship to my country, and what is the warranty?<\/h4>\n<p>Yes. RendatSP ships worldwide from Yiwu, China, by air in 5 to 7 days once the part is ready, and every part carries a 1-year warranty. Send the order number and quantity on WhatsApp and we will reply with a quotation.<\/p>\n<h3>Before you order<\/h3>\n<p>Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.<\/p>\n<p>Need it fast? Send the order number, quantity and delivery country on WhatsApp or through the inquiry form and we reply with a quotation the same working day. All parts are new and original, covered by a 1-year warranty, and ship worldwide by air in 5 to 7 days once ready (<a href=\"https:\/\/www.rendatsp.com\/ar\/shipping-payment-warranty\/\">shipping, payment and warranty<\/a>). Local agents: Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.<\/p>","protected":false},"excerpt":{"rendered":"<p>Genuine Siemens 3RH2911-1HA20: front-mounting auxiliary switch block with 2 NO contacts and screw terminals, for SIRIUS 3RT2 contactors and 3RH2 contactor relays. New original Siemens, supplied by RendatSP with worldwide shipping.<\/p>","protected":false},"featured_media":6725,"template":"","meta":{"_monsterinsights_skip_tracking":false,"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":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","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":[137],"product_cat":[43,358],"product_tag":[],"class_list":["post-7015","product","type-product","status-publish","has-post-thumbnail","product_brand-siemens","product_cat-siemens","product_cat-sirius-3rh2-control-relays","desktop-align-center","tablet-align-left","mobile-align-left","first","instock","taxable","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/product\/7015","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/media\/6725"}],"wp:attachment":[{"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/media?parent=7015"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/product_brand?post=7015"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/product_cat?post=7015"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.rendatsp.com\/ar\/wp-json\/wp\/v2\/product_tag?post=7015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}