{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1935-5AB01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1935-5AB01","canonicalUrl":"https://aoctrl.com/siemens/3RT1935-5AB01","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1935-5AB01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Magnet coil, 3RT1935-5AB01, 24 V AC 50 Hz, Size S2, screw terminal.","salesMarkdown":"It's the coil that pulls in and holds the contactor armature — if the contactor itself is fine but the coil is open or shorted, this is the swap part that keeps the panel running without replacing the whole contactor. This part is marked as a phased-out product. The official successor is the SIRIUS 3RT2 series coil — same Size S2 footprint, same 24 V AC control voltage, but the newer platform. The screw-terminal pattern and mounting dimensions carry across, but verify the control-circuit wiring — the 3RT2 coil may use a different terminal layout. The 0.8... 1.1 at 50 Hz figure is the operating voltage range as a factor of the rated 24 V — so the coil reliably picks up and holds between about 19.2 V and 26.4 V AC. Below that dropout threshold the contactor drops out, which matters if your control transformer is lightly loaded or you're running a long 24 V AC circuit with voltage drop. The screw terminal accepts the same wire sizes as the SIRIUS Size S2 contactor's control circuit, typically 2x (0.5... 1.5 mm²) solid or stranded with ferrule. Mounts directly onto the contactor's coil spigot; no DIN-rail space consumed.","metaTitle":"Siemens 3RT1935-5AB01 SIRIUS Magnet Coil, 24 V AC, Size S2","metaDescription":"Siemens SIRIUS 3RT1935-5AB01 magnet coil for Size S2 contactors, 24 V AC 50 Hz, screw terminal. Phased-out — successor is SIRIUS 3RT2. Sourced to order against 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":"24 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=75731&mlfb=3RT1935-5AB01","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1935-5AB01/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1935-5AB01?","answer":"We source this phased-out coil through independent distribution channels. Submit an RFQ for current availability and pricing — we confirm both at quote time."},{"question":"What replaces 3RT1935-5AB01?","answer":"The official successor is the SIRIUS 3RT2 series coil for Size S2 contactors, same 24 V AC control voltage. Verify terminal layout before re-specifying."},{"question":"Will 3RT1935-5AB01 drop into a panel specified around 3RT1026-1AB00?","answer":"No — 3RT1026-1AB00 is a Size S0 power contactor, not a Size S2. The coil form factor and mounting spigot differ between S0 and S2 frames. This coil fits only SIRIUS Size S2 contactors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1935-5AB01","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/3RT1935-5AB01 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}}