{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1934-5BM41","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1934-5BM41","canonicalUrl":"https://aoctrl.com/siemens/3RT1934-5BM41","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1934-5BM41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS magnet coil, Size S2, screw terminal, 220 V DC, phased-out product with successor SIRIUS 3RT2.","salesMarkdown":"The Siemens 3RT1934-5BM41 is a SIRIUS magnet coil designed for Size S2 contactors, with a screw terminal connection and a 220 V DC control supply voltage. It's the replacement coil for a contactor that's lost its pull-in — you swap the coil, not the whole contactor block, when the winding opens or the DC supply changes. This part is flagged as a phased-out product. The official successor is the SIRIUS 3RT2 series coil — same Size S2 footprint, same screw terminal pattern, but the 3RT2 generation. No drop-in guarantee between generations without checking the mounting and electrical interface. ## What the 220 V DC rating means on the line 220 V DC is the rated control voltage — the coil is designed to pull in and hold reliably at that DC level. On a DC control bus, voltage drop across long cable runs matters more than with AC; verify the actual voltage at the coil terminals under load stays above the minimum pick-up threshold (typically around 0.85 x rated for DC coils in the SIRIUS family). If your panel runs a 220 V DC bus that sags below ~187 V during simultaneous pick-up of multiple contactors, this coil may chatter or fail to seal. Screw terminal connection — strip and torque per the contactor's terminal specification. The coil mounts directly onto the Size S2 contactor yoke; no additional hardware needed. If you're replacing a failed coil on an existing SIRIUS S2 contactor, the 3RT1934-5BM41 is the direct form-fit-function match for the 220 V DC variant. Verify the contactor's rated operational current and utilization category (AC-3, AC-4) haven't changed with the coil swap — the coil doesn't affect the main pole ratings.","metaTitle":"Siemens 3RT1934-5BM41 SIRIUS Magnet Coil, 220 V DC, Phased O","metaDescription":"Siemens 3RT1934-5BM41 SIRIUS magnet coil for Size S2 contactors, 220 V DC, screw terminal. Phased-out product with successor SIRIUS 3RT2. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"lifecycle_stage":"current","Product Brand Name":"SIRIUS","1 at DC rated value":"220 V","Product Designation":"Magnet coil","Type Of Voltage Of The Control Supply Voltage":"DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=154767&mlfb=3RT1934-5BM41","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1934-5BM41/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1934-5BM41 and get a price?","answer":"We source this phased-out part through independent distribution channels. Submit an RFQ against your required quantity — availability and current pricing are confirmed at quote time. The successor SIRIUS 3RT2 coil is also available to quote if you prefer to transition."},{"question":"What is the closest functional second-source for 3RT1934-5BM41?","answer":"The closest functional match is the SIRIUS 3RT2 series coil for Size S2 contactors at 220 V DC. The 3RT1934-5BM41 is the phased-out predecessor; the 3RT2 is the official replacement. Verify the mounting interface and terminal arrangement before swapping generations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1934-5BM41","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RT1934-5BM41 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}