{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4340-7CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4340-7CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4340-7CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4340-7CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4340-7CC11, 3-pole miniature circuit breaker, 40 A rated current, C tripping characteristic, 10 kA breaking capacity at 400 V AC, 72 V DC max, IP20, quick-assembly mounting.","salesMarkdown":"## What it is and what it does The Siemens 5SY4340-7CC11 is a 3-pole miniature circuit breaker from the SENTRON family, rated 40 A at 400 V AC with a C tripping characteristic. The C curve means it tolerates moderate inrush — typical for motor and transformer circuits — before tripping on short-circuit or sustained overload. Its 10 kA breaking capacity per EN 60898 is sized for standard industrial distribution panels where fault levels stay under that threshold. ## Deployment context and mounting Mounts on DIN rail via the quick-assembly system — snaps into any position, no tools needed. The 54 mm width (3 width units) and 76 mm depth fit standard SENTRON enclosures; installation depth is 70 mm. Rated IP20 with connected conductors, so it belongs inside a closed panel, not exposed to washdown. Designed for railway applications per the evidence, which means it meets vibration and temperature cycling beyond typical commercial-grade MCBs. ## Lifecycle and sourcing reality The lifecycle stage is marked current — this is an active, in-production part. For a BOM line that calls out 5SY4340-7CC11, the part is sourced through independent distribution and quoted to order against an RFQ; availability and current pricing are confirmed at quote time. ## Key ratings and what they mean for fit Rated 40 A at 400 V AC — sized for a 3-phase load drawing up to that current, such as a small motor group or a lighting sub-panel. The C characteristic (magnetic trip between 5 and 10 times In) handles the start-up surge of induction motors without nuisance tripping. Maximum DC voltage is 72 V, so it can also serve DC circuits up to that level, but the breaking capacity at DC is not stated — verify for DC-only applications. The 10 kA rating per EN 60898 is the standard for most commercial and light industrial distribution boards; if your available fault current exceeds that, you need an upstream current-limiting device.","metaTitle":"Siemens 5SY4340-7CC11 SENTRON MCB, 3P 40A C-Curve, 10kA","metaDescription":"Siemens 5SY4340-7CC11 SENTRON miniature circuit breaker, 3-pole, 40 A, C characteristic, 10 kA breaking capacity per EN 60898, 400 V AC. Current lifecycle stage, available to order","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"3","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Degree of pollution":"3","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","Energy limiting class":"3","Number of width units":"3","Number of poles / Note":"3P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000"}},"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=537782&mlfb=5SY4340-7CC11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4340-7CC11/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4340-7CC11","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/5SY4340-7CC11 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}}