{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT6926-5AC21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT6926-5AC21","canonicalUrl":"https://aoctrl.com/siemens/3RT6926-5AC21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT6926-5AC21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS magnet coil 3RT6926-5AC21, AC 24 V, 50/60 Hz, 10.5 VA, screw terminal, for size S0 contactors.","salesMarkdown":"The Siemens SIRIUS 3RT6926-5AC21 is a replacement magnet coil for size S0 motor contactors — the ones rated up to 18.5 kW on a 400 V line. It's the part that pulls the main contactor in, so if the coil's gone open, the contactor won't pick up. Coil voltage is 24 V AC at both 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz, and 0.85 to 1.1 at 60 Hz — that means it'll hold in down to about 19.2 V at 50 Hz, and drop out below that. Typical power draw is 10.5 VA, so it's light on the control transformer. Screw terminals for the connection; same footprint as the original coil on any S0-frame SIRIUS contactor. The coil mounts directly onto the contactor's magnet yoke; no DIN rail space consumed beyond the contactor itself. If you're replacing a coil in a live panel, isolate the control circuit first — the coil draws 10.5 VA holding, but inrush at pickup is higher (around 37 VA typical for the S0 family). The operating range (0.8 to 1.1 x Un) means a saggy control transformer at 20 V might still hold it in, but below 19 V it drops out. Keep the control voltage clean.","metaTitle":"Siemens 3RT6926-5AC21 SIRIUS Magnet Coil, 24 V AC, Size S0","metaDescription":"Siemens SIRIUS 3RT6926-5AC21 magnet coil for size S0 contactors, 24 V AC, 10.5 VA. Current production. Sourced to order. RFQ for price and lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Magnet coil","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Type Of Voltage Of The Control Supply Voltage":"AC","power loss [V∙A] of magnet coil at AC typical":"10.5 V·A"}},"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=580368&mlfb=3RT6926-5AC21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT6926-5AC21/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT6926-5AC21 and what is the lead time?","answer":"This coil is sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ."},{"question":"What does the 0.8... 1.1 operating range at 50 Hz mean?","answer":"It means the coil will pick up and hold in when the supply voltage is between 80% and 110% of the rated 24 V AC — so from about 19.2 V to 26.4 V. Below 19.2 V it drops out."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT6926-5AC21","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/3RT6926-5AC21 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}}