{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1956-1CB00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1956-1CB00","canonicalUrl":"https://aoctrl.com/siemens/3RT1956-1CB00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1956-1CB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1956-1CB00, surge suppressor (RC element), for 3RT1 S6, S10, S12 contactors, screw terminal, 24...48 V AC, 24...70 V DC, active lifecycle.","salesMarkdown":"The Siemens 3RT1956-1CB00 is a SIRIUS surge suppressor — an RC element designed to clamp voltage spikes from the contactor coil when it de-energizes. It mounts directly onto the coil terminals of 3RT1 S6, S10, and S12 contactors via screw terminals, so it shares the same DIN-rail footprint as the contactor it protects. The voltage rating covers 24...48 V AC at both 50 Hz and 60 Hz, and a wider 24...70 V DC range — meaning it works across standard control voltages in North American (24 V, 48 V) and European (24 V, 48 V) panels without a separate DC-rated variant. The DC range of 24...70 V is the one to watch if you are running a 48 V DC control bus — many suppressors top out at 60 V DC, but this one holds to 70 V, giving headroom for a 48 V nominal supply that can ride up to 56 V under float charge. The AC range of 24...48 V covers both 24 V and 48 V control transformers at line frequency. Because it is an RC element rather than a varistor or diode, it suppresses both positive and negative transients without polarity concerns — useful when the coil drive is bidirectional or when you are retrofitting into a panel where the original wiring polarity is unknown.","metaTitle":"Siemens 3RT1956-1CB00 SIRIUS Surge Suppressor, RC Element, 2","metaDescription":"Siemens SIRIUS 3RT1956-1CB00 surge suppressor (RC element) for 3RT1 S6, S10, S12 contactors. Rated 24-48 V AC, 24-70 V DC. Active lifecycle. Available to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"at DC":"24 ... 70 V","title":"3RT1956-1CB00","at 50 Hz":"24 ... 48 V","at 60 Hz":"24 ... 48 V","description":"Surge suppressor (RC element) For 3RT1 S6, S10, S12 With screw terminal (operating mechanism) 24...48 V AC, 24...70 V DC","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Product Brand Name":"SIRIUS","Product Designation":"surge suppressor","Substance Prohibitance (Date)":"07/01/2006","Design Of The Surge Suppressor":"RC element","Type Of Voltage Of The Control Supply Voltage":"AC/DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ef3279d8e16f558e258e3c3d2a9a2c75.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=301191&mlfb=3RT1956-1CB00"},"ai":{"faq":[{"question":"What contactors does 3RT1956-1CB00 fit?","answer":"It is designed for Siemens 3RT1 contactors in frame sizes S6, S10, and S12, with screw terminals on the coil connection."},{"question":"What is the voltage range of 3RT1956-1CB00?","answer":"24...48 V AC at 50/60 Hz and 24...70 V DC."},{"question":"Where can I buy 3RT1956-1CB00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1956-1CB00","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/3RT1956-1CB00 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}