{"product_id":"siemens-3rh1921-1fa31","title":"3RH1921-1FA31","description":"\u003ch2\u003eBuy genuine Siemens 3RH1921-1FA31 online\u003c\/h2\u003e\n\u003cp\u003eThe Siemens 3RH1921-1FA31 is an industrial-grade auxiliary contact block designed for seamless integration with Sirius series contactors. Featuring a 4-pole design with 3 normally open (NO) and 1 normally closed (NC) contacts, this front-mount accessory offers reliable signaling and control capabilities. Its quick snap-on installation mechanism fits Siemens 3RT1 Size S0, S2, or S3 three-pole contactors, enabling tool-less mounting and removal, minimizing downtime during maintenance. Engineered to meet IEC 60947-5-1 and VDE standards, the 3RH1921-1FA31 provides durable operation with high contact reliability suitable for heavy-duty industrial automation environments. Its IP20 protection class ensures safety for the front side while operating reliably within temperature ranges of -25 °C to +60 °C. This auxiliary block enhances contactor versatility with screw terminal connections for secure wiring and is ideal for expanding the switching capabilities of your control system.\u003c\/p\u003e\n\u003ch2\u003eKey Features of Siemens 3RH1921-1FA31\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e4-pole contact block with 3 NO and 1 NC auxiliary contacts for versatile control logic\u003c\/li\u003e\n  \u003cli\u003eSnap-on front mounting compatible with Siemens Sirius 3RT1 contactors (Size S0-S3)\u003c\/li\u003e\n  \u003cli\u003eScrew terminal connections provide secure and easy wiring\u003c\/li\u003e\n  \u003cli\u003eHigh contact reliability with up to 100 million switching operations at low currents\u003c\/li\u003e\n  \u003cli\u003eCompliance with IEC 60947-5-1 and EN 60 947 standards\u003c\/li\u003e\n  \u003cli\u003eProtection class IP20 on the front side for operator safety\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range from -25 °C to +60 °C, consistent with industrial conditions\u003c\/li\u003e\n  \u003cli\u003eExpandable auxiliary switching poles when combined with side-mounted contacts\u003c\/li\u003e\n  \u003cli\u003eDesigned for use in contactor relays and power contactors in demanding industrial applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specs of 3RH1921-1FA31\u003c\/h2\u003e\n\u003cp\u003eRefer to Siemens 3RH1921-1FA31 specifications covering voltage, contact configuration, and operational limits to ensure system compatibility.\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 Configuration\u003c\/td\u003e\n    \u003ctd\u003e3 NO + 1 NC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRated Insulation Voltage\u003c\/td\u003e\n    \u003ctd\u003e690 V\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eContact Current (AC-15, 230V)\u003c\/td\u003e\n    \u003ctd\u003e6 A\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\u003eElectrical Life\u003c\/td\u003e\n    \u003ctd\u003e200,000 cycles at AC-15 \/ 230V\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n    \u003ctd\u003e-25 °C to +60 °C\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProtection Class\u003c\/td\u003e\n    \u003ctd\u003eIP20 (front)\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications \/ Use Case\u003c\/h2\u003e\n\u003cp\u003eThis Siemens 3RH1921-1FA31 is commonly used in machine automation and factory control panels worldwide. Its role as an auxiliary contact block enables it to expand and customize control signals from primary contactors, allowing sophisticated automation circuits. It is ideal for assembly lines, conveyor systems, and process control setups requiring reliable status feedback and interlocking functions. The compact modular design facilitates easy upgrades or replacements in existing control systems, enhancing operational flexibility in production environments.\u003c\/p\u003e\n\u003ch2\u003ePrice \u0026amp; Availability\u003c\/h2\u003e\n\u003cp\u003eCheck Siemens 3RH1921-1FA31 price online through LeadTime.ca for fast worldwide dispatch.\u003c\/p\u003e\n\u003ch2\u003eWhy Order from LeadTime.ca\u003c\/h2\u003e\n\u003cp\u003eAll products on LeadTime.ca are genuine factory-tested, supplied by trusted distributors, and ready for international delivery. Order now for worldwide delivery and benefit from fast, secure shipping and expert customer support for your industrial automation needs.\u003c\/p\u003e\n\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/\"\u003eLeadTime.ca – Industrial Automation Components \u0026amp; Repair Services\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/collections\/siemens\"\u003eBrowse Siemens PLCs, Drives \u0026amp; Automation Parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-plc-programming-basics\"\u003eSiemens PLC Programming Basics\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-profibus-configuration\"\u003eSiemens Profibus Configuration Guide\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/siemens-drive-parameter-setup\"\u003eSiemens Drive Parameter Setup\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":47796350779691,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/Leadtime_d67c8d34-1f21-4580-bb1e-fda74b5d2f2d.png?v=1723551781","url":"https:\/\/leadtime.ca\/products\/siemens-3rh1921-1fa31","provider":"LEADTIME","version":"1.0","type":"link"}