{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1934-5BW42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1934-5BW42","canonicalUrl":"https://aoctrl.com/siemens/3RT1934-5BW42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1934-5BW42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, magnet coil, 3RT1934-5BW42, 48 V DC, spring-loaded connection, Size S2.","salesMarkdown":"The Siemens 3RT1934-5BW42 is a SIRIUS magnet coil designed for Size S2 contactors, operating on a 48 V DC control supply voltage using spring-loaded connection technology. ## What the 48 V DC rating means for fit The 48 V DC coil rating determines the control voltage required to pick and hold the contactor. In a 48 V DC control circuit, this coil draws its rated inrush and holding power, so verify your control transformer or power supply is sized for the coil's VA demand at 48 V. The spring-loaded connection (cage clamp) accepts solid or ferruled stranded wire without requiring screw tightening, which speeds panel wiring and resists vibration loosening. The spring-loaded terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or ferruled stranded conductors.","metaTitle":"Siemens 3RT1934-5BW42 SIRIUS Magnet Coil, 48 V DC","metaDescription":"Siemens 3RT1934-5BW42 SIRIUS magnet coil, 48 V DC, Size S2, spring-loaded connection. Phased-out; successor is 3RT2 series. 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":"48 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=58383&mlfb=3RT1934-5BW42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1934-5BW42/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RT1934-5BW42?","answer":"The official successor is the SIRIUS 3RT2 series. Verify the specific 3RT2 order code against your contactor frame size and control voltage."},{"question":"What control voltage does this coil require?","answer":"It requires 48 V DC control supply voltage."},{"question":"What brand and series is this part?","answer":"It is a Siemens SIRIUS magnet coil."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1934-5BW42","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/3RT1934-5BW42 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}}