{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5944-5AR61","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5944-5AR61","canonicalUrl":"https://aoctrl.com/siemens/3RT5944-5AR61","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5944-5AR61","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS magnet coil, 3RT5944-5AR61, AC control voltage, 220 V at 50 Hz / 240 V at 60 Hz, screw terminal.","salesMarkdown":"## Coil Specs & Panel Fit The Siemens 3RT5944-5AR61 is a SIRIUS magnet coil — the replaceable solenoid that pulls in and holds the contactor armature. It's the part that fails when a coil burns out or the control voltage changes, so this is what you swap to get a contactor back in service without replacing the whole power block. Rated 220 V at 50 Hz and 240 V at 60 Hz AC, with an operating range of 0.8 to 1.1 times nominal at 50 Hz. That means the coil holds in reliably down to about 176 V and picks up cleanly up to 242 V on a 220 V nominal line — useful if your control transformer sags under load or you're feeding from a generator that drifts. Termination is screw-type, so it's a direct drop-in for existing SIRIUS contactor installations that use screw terminals on the coil circuit. No crimping tool change or terminal adapter needed — just land the wires and torque. Because it's active, the supply channel is the normal Siemens distribution network. No surplus gamble, no broker hunt — just a standard procurement line. ## What the Operating Range Tells a Field Tech The 0.8 to 1.1 operating range at 50 Hz is the voltage band over which the coil will pick up and seal. Below 0.8 × nominal (176 V for the 220 V tap) the coil may chatter or fail to close — that's your diagnostic threshold if you're troubleshooting a contactor that buzzes or won't pull in. Above 1.1 × nominal (242 V) you risk overheating the coil winding. Measure the control voltage at the coil terminals, not at the transformer output; voltage drop across long control wiring is a common miss.","metaTitle":"Siemens 3RT5944-5AR61 SIRIUS Magnet Coil, 220V 50Hz / 240V 6","metaDescription":"Siemens 3RT5944-5AR61 SIRIUS magnet coil for contactors. Rated 220V at 50Hz, 240V at 60Hz AC. Current lifecycle stage. 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":"220 V","at 60 Hz rated value":"240 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=580080&mlfb=3RT5944-5AR61","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5944-5AR61/alternatives.json"},"ai":{"faq":[{"question":"What is the coil voltage for 3RT5944-5AR61?","answer":"Rated 220 V at 50 Hz and 240 V at 60 Hz AC, with an operating range of 0.8 to 1.1 times nominal at 50 Hz."},{"question":"Where can I buy 3RT5944-5AR61 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 3RT5944-5AR61 drop into a panel built around 3RT1023-1AL20?","answer":"No — the 3RT1023-1AL20 is a complete SIRIUS Size S0 power contactor, not a separate coil. The 3RT5944-5AR61 is a replacement magnet coil for a contactor that already has the power block; they serve different BOM positions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5944-5AR61","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/3RT5944-5AR61 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}}