{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6440-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6440-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6440-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6440-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6440-7CC, 4-pole miniature circuit breaker, C-curve, 40 A rated at 35 °C, 6 kA breaking capacity per EN 60898, IP20, halogen-free, silicon-free.","salesMarkdown":"## SENTRON 5SY6440-7CC — 4-Pole C-Curve MCB at 40 A The Siemens SENTRON 5SY6440-7CC is a 4-pole miniature circuit breaker with a C-tripping characteristic, rated 40 A at 35 °C and providing a 6 kA breaking capacity certified to EN 60898. This is the part for a 3-phase plus neutral branch circuit where the load is moderate-inrush — motors, transformers, or groups of LED drivers — and the fault current at the panel does not exceed 6 kA. The 40 A rating is valid at 35 °C ambient. At 40 °C the continuous current drops to 38.12 A; at 45 °C to 37.12 A; at 50 °C to 36.12 A; and at 55 °C to 35.08 A. The operating range spans -40 °C to 75 °C, with humidity limits of 95% up to 55 °C, 55% up to 70 °C, and 35% at 75 °C. The combined terminal at both top and bottom accepts the same conductor range, so wiring order is reversible. ## Compliance and Material Declarations Halogen-free and silicon-free construction is declared, which matters for outgassing-sensitive environments such as clean rooms, medical equipment, or aerospace panels where silicone contamination can inhibit relay contacts. The MCB is sealable — a lead seal can be fitted through the housing to prevent tampering in metered or safety-critical circuits. Energy limitation class 3 is assigned per EN 60898, meaning the let-through energy under fault is low enough to protect downstream wiring without cascading damage.","metaTitle":"Siemens 5SY6440-7CC SENTRON MCB, 4P C-40A 6kA","metaDescription":"Siemens SENTRON 5SY6440-7CC miniature circuit breaker, 4-pole, C-curve, 40 A rated, 6 kA breaking capacity per EN 60898. IP20, halogen-free, silicon-free. Active production, source","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"40 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","at 35 °C rated value":"40 A","at 40 °C rated value":"38.12 A","at 45 °C rated value":"37.12 A","at 50 °C rated value":"36.12 A","at 55 °C rated value":"35.08 A","Energy Limitation Class":"3","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"6 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"3.5 W"}},"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=170560&mlfb=5SY6440-7CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6440-7CC/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY6440-7CC?","answer":"6 kA per EN 60898. This is sufficient for most commercial and light-industrial sub-distribution boards where the prospective short-circuit current at the breaker is under 6 kA."},{"question":"What compliance documentation does Siemens provide for 5SY6440-7CC?","answer":"The MCB carries declarations for halogen-free and silicon-free construction, and is certified to EN 60898. Pollution degree 3 and overvoltage category III are declared, meeting the requirements for fixed industrial installations. Full RoHS and REACH declarations are available from Siemens on request."},{"question":"Where can I buy 5SY6440-7CC and what is the lead time?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6440-7CC","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/5SY6440-7CC 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}}