{"product_id":"siemens-3rh1921-1fa40","title":"3RH1921-1FA40","description":"\u003ch2\u003eOverview of Siemens 3RH1921-1FA40\u003c\/h2\u003e\n\u003cp\u003eShop genuine Siemens 3RH1921-1FA40 directly from LeadTime.ca to upgrade your automation system with reliable, high-performance components. This front-mounted auxiliary contact block is designed for seamless integration with Siemens 3RT1 contactors, offering 4 normally open (NO) contacts for enhanced circuit control and monitoring. With easy snap-on installation and robust screw terminals, the Siemens 3RH1921-1FA40 delivers flexibility for a broad range of industrial applications, from machinery control to safety interlocks. Built to IEC and EN standards, this contact block ensures dependable operation in demanding environments, making it a smart buy for engineers, system integrators, and maintenance professionals seeking quality and compatibility.\u003c\/p\u003e\n\u003ch2\u003eKey Features of Siemens 3RH1921-1FA40\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e4 normally open (NO) auxiliary contacts for expanded control options\u003c\/li\u003e\n  \u003cli\u003eSnap-on front mounting for tool-less installation and removal—saves time during setup and maintenance\u003c\/li\u003e\n  \u003cli\u003eScrew terminals for secure, vibration-resistant connections\u003c\/li\u003e\n  \u003cli\u003eCompatible with Siemens 3RT1 Size S0, S2, and S3 3-pole contactors—buy online for flexible automation solutions\u003c\/li\u003e\n  \u003cli\u003eRated for both AC and DC operation, supporting versatile system designs\u003c\/li\u003e\n  \u003cli\u003eHigh contact reliability: less than one incorrect switching per 100 million operations at 17 V, 5 mA\u003c\/li\u003e\n  \u003cli\u003eIP20 degree of protection—ideal for enclosure installation\u003c\/li\u003e\n  \u003cli\u003e6 kV surge voltage rating for enhanced durability in industrial environments\u003c\/li\u003e\n  \u003cli\u003eConforms to IEC 60947-5-1, EN 60947, and UL 508 standards\u003c\/li\u003e\n  \u003cli\u003eMechanical service life of 10 million switching cycles—buy Siemens 3RH1921-1FA40 for long-term reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specs of Siemens 3RH1921-1FA40\u003c\/h2\u003e\n\u003cp\u003eReview Siemens 3RH1921-1FA40 specifications for detailed parameters before installation.\u003c\/p\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eContact Type\u003c\/td\u003e\n    \u003ctd\u003e4 NO\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMounting\u003c\/td\u003e\n    \u003ctd\u003eFront\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTerminals\u003c\/td\u003e\n    \u003ctd\u003eScrew\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRated Voltage\u003c\/td\u003e\n    \u003ctd\u003e690 VAC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRated Current\u003c\/td\u003e\n    \u003ctd\u003e0.41 A\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProtection\u003c\/td\u003e\n    \u003ctd\u003eIP20\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMechanical Life\u003c\/td\u003e\n    \u003ctd\u003e10,000,000 cycles\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSurge Voltage\u003c\/td\u003e\n    \u003ctd\u003e6 kV\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eStandards\u003c\/td\u003e\n    \u003ctd\u003eIEC 60947-5-1, EN 60947, UL 508\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications \/ Use Case\u003c\/h2\u003e\n\u003cp\u003eThis Siemens 3RH1921-1FA40 is commonly used in industrial automation worldwide, including process control, machine automation, and production line systems. It’s ideal for OEMs, panel builders, and industrial maintenance teams needing reliable auxiliary contacts for status indication, interlocking, and feedback. Easily snap it onto Siemens 3RT1 contactors to add signaling and control functionality in conveyor systems, packaging machines, and factory control panels. With its robust design and high switching reliability, this contact block is built for repetitive use in harsh conditions—get Siemens 3RH1921-1FA40 for dependable automation performance.\u003c\/p\u003e\n\u003ch2\u003ePrice \u0026amp; Availability\u003c\/h2\u003e\n\u003cp\u003eCheck Siemens 3RH1921-1FA40 pricing and stock status online for fast worldwide dispatch.\u003c\/p\u003e\n\u003ch2\u003eWhy Order from LeadTime.ca\u003c\/h2\u003e\n\u003cp\u003eEvery product on LeadTime.ca is original OEM, supplied by trusted distributors, and ready for international delivery. Order now for worldwide delivery and experience genuine Siemens quality backed by expert support.\u003c\/p\u003e\n\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cp\u003e\n  \u003ca href=\"https:\/\/leadtime.ca\/\"\u003eLeadTime.ca – Industrial Automation Components \u0026amp; Repair Services\u003c\/a\u003e\u003cbr\u003e\n  \u003ca href=\"https:\/\/leadtime.ca\/collections\/siemens\"\u003eBrowse Siemens PLCs, Drives \u0026amp; Automation Parts\u003c\/a\u003e\u003cbr\u003e\n  \u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-plc-programming-basics\"\u003eGuide to Siemens PLC Programming Basics\u003c\/a\u003e\u003cbr\u003e\n  \u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-profibus-configuration\"\u003eBest Practices for Siemens PROFIBUS Configuration\u003c\/a\u003e\u003cbr\u003e\n  \u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-drive-parameter-setup\"\u003eHow to Set Up Siemens Drive Parameters\u003c\/a\u003e\n\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":47912577564971,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/3RH1921-1FA40.png?v=1707388350","url":"https:\/\/leadtime.ca\/products\/siemens-3rh1921-1fa40","provider":"LEADTIME","version":"1.0","type":"link"}