{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1934-5AP01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1934-5AP01","canonicalUrl":"https://aoctrl.com/siemens/3RT1934-5AP01","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1934-5AP01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1934-5AP01 magnet coil, 230 V AC 50 Hz, screw terminal, Size S2 contactor replacement coil.","salesMarkdown":"The Siemens SIRIUS 3RT1934-5AP01 is a replacement magnet coil for Size S2 contactors in the SIRIUS family, wound for 230 V AC control supply at 50 Hz. It terminates through screw terminals and is the coil you'd swap when the original contactor's electromagnet fails or the control voltage changes. The operating range at 50 Hz holds between 0.8 and 1.1 times the rated voltage, so it'll pick up reliably even if the line sags a bit, but won't drop out on a mild brownout. The coil is sized for SIRIUS Size S2 contactors. Mounting is straightforward — the coil snaps onto the contactor's magnet stack and the screw terminals accept the control wiring. ## Voltage and Duty Considerations Rated for 230 V AC control supply only — this is not a dual-voltage or DC coil. The AC pick-up power is higher than the holding power (a standard AC coil characteristic), so the control transformer feeding it needs to handle the inrush without dropping below the 0.8x pick-up threshold. If your panel runs on 60 Hz, this coil is specified for 50 Hz only; you'd need the 60 Hz variant for reliable operation on a 60 Hz line.","metaTitle":"Siemens 3RT1934-5AP01 SIRIUS Magnet Coil, 230 V AC 50 Hz","metaDescription":"Siemens SIRIUS 3RT1934-5AP01 magnet coil for Size S2 contactors. 230 V AC, 50 Hz, screw terminals. Phased-out product; successor is SIRIUS 3RT2. Source to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"at 50 Hz":"0.8 ... 1.1","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Magnet coil","at 50 Hz rated value":"230 V","Type Of Voltage Of The Control Supply Voltage":"AC"}},"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=291812&mlfb=3RT1934-5AP01","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1934-5AP01/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RT1934-5AP01?","answer":"The official successor is the SIRIUS 3RT2 series coil. The exact replacement order code depends on the contactor frame size and control voltage; cross-reference the 3RT2 catalog for the 230 V AC 50 Hz equivalent."},{"question":"Will the 3RT1934-5AP01 drop into a panel specified for a 3RT1023-1AL20 contactor?","answer":"No. The 3RT1934-5AP01 is a magnet coil for Size S2 contactors, while the 3RT1023-1AL20 is a Size S0 power contactor. The coil is physically different and won't fit the S0 contactor's magnet stack. You need the coil matched to your contactor frame size."},{"question":"What is the operating voltage range for this coil?","answer":"At 50 Hz, the coil operates between 0.8 and 1.1 times the rated 230 V AC, so the pick-up range is 184 V to 253 V AC. Below 184 V it may not pull in reliably; above 253 V risks overheating the coil."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1934-5AP01","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/3RT1934-5AP01 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}}