{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1935-5AD01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1935-5AD01","canonicalUrl":"https://aoctrl.com/siemens/3RT1935-5AD01","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1935-5AD01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS magnet coil, 3RT1935-5AD01, for Size S2 contactors, 42 V AC 50 Hz, screw terminal, phased-out.","salesMarkdown":"The Siemens 3RT1935-5AD01 is a SIRIUS magnet coil designed for Size S2 contactors, with a 42 V AC control supply at 50 Hz and screw-type terminals. This is the replacement coil for the contactor body — if the coil fails, you swap this, not the whole contactor. The 42 V AC coil draw is specified at 0.8... 1.1 A at 50 Hz, which is the inrush and hold current you need to budget for in the control transformer sizing. ## Comparison with 3RT7036-1AH20 The closest functional peer is the 3RT7036-1AH20, also a Size S2 magnet coil with 42 V AC control voltage. The key difference: the 3RT7036-1AH20 draws 0.36 A at 50 Hz versus the 3RT1935-5AD01's 0.8... 1.1 A. That is a significant inrush current delta — the 3RT7036-1AH20 is a lower-power coil design. It will not drop into a panel wired for the 3RT1935-5AD01 without checking the control transformer capacity and the contactor's pick-up voltage under load. Same physical footprint (55 mm width, 115 mm depth, 112 mm height) and same screw-terminal mounting, but the coil characteristics differ enough that a direct swap may cause pick-up issues if the transformer is sized for the higher inrush of the original.","metaTitle":"Siemens 3RT1935-5AD01 SIRIUS Magnet Coil, 42 V AC 50 Hz","metaDescription":"Siemens 3RT1935-5AD01 SIRIUS magnet coil for Size S2 contactors. 42 V AC 50 Hz, screw terminal. Phased-out; successor is SIRIUS 3RT2. Sourced to order.","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":"42 V","Type Of Voltage Of The Control Supply Voltage":"AC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$28.80","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=4556&mlfb=3RT1935-5AD01","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1935-5AD01/alternatives.json"},"ai":{"faq":[{"question":"Will 3RT1935-5AD01 fit a panel designed for 3RT7036-1AH20?","answer":"Physically yes — same Size S2 footprint (55 mm width, 115 mm depth, 112 mm height) and screw-terminal mounting. However, the inrush current differs significantly: 0.8... 1.1 A for the 3RT1935-5AD01 versus 0.36 A for the 3RT7036-1AH20. Verify the control transformer can handle the higher inrush before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1935-5AD01","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/3RT1935-5AD01 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}}