{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6340-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6340-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6340-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6340-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6340-7 miniature circuit breaker, 3-pole, C-trip characteristic, 6 kA (EN 60898-1) / 10 kA (IEC 60947-2), 400 V AC, 50/60 Hz.","salesMarkdown":"At DC per IEC 60947-2 it's rated 15 kA at 60 V (max 72 V operating voltage). Under UL 1077 and CSA C22.2 No. 235 it carries 5 kA, which covers North American supplementary-protector installations. Rated operational voltage is 400 V AC (440 V max for single- or multi-phase operation). The 3-pole design does not switch the neutral conductor. Mounting position is any, and the fastening method is the quick-assembly system — snaps onto DIN rail per the standard 3-module-width footprint (54 mm wide, 90 mm tall, 76 mm deep, 70 mm installation depth). The 5SY6340-7 carries approvals to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No. 235, so it is accepted across European and North American regulatory jurisdictions. The halogen-free and silicon-free construction is relevant for environments sensitive to outgassing — clean rooms, medical device manufacturing, or aerospace-adjacent panels. ## Panel integration and environmental limits Sealable means the toggle can be locked in the off position with a padlock hasp — useful for lockout/tagout compliance without an accessory. IP20 with connected conductors is the protection class; this is an enclosed-panel part, not for wet or outdoor exposure. Ambient temperature range is -40 °C to +75 °C, with derating for humidity: max 95% RH up to 55 °C, tapering to 35% RH at 75 °C.","metaTitle":"Siemens 5SY6340-7 SENTRON MCB, 3P C-Curve, 6kA/10kA","metaDescription":"Siemens 5SY6340-7 SENTRON miniature circuit breaker, 3-pole, C-curve, 6 kA per EN 60898-1 / 10 kA per IEC 60947-2. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY6340-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 6kA, 3-pole, C, 40A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 V","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","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"10 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","at DC according to IEC 60947-2 rated value":"15 kA","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 (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","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":"$57.15","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0b864f0eba14abfa209974882b0b18f9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=462977&mlfb=5SY6340-7"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY6340-7?","answer":"It is dual-rated: 6 kA per IEC/EN 60898-1, 10 kA per IEC 60947-2 (AC), and 15 kA at 60 V DC per IEC 60947-2. Under UL 1077 / CSA C22.2 No. 235 it carries 5 kA."},{"question":"What is the C-curve trip characteristic on this MCB?","answer":"The C-curve (tripping characteristic class C) trips between 5 and 10 times rated current, making it suitable for moderate inrush loads such as small motors, contactor coils, and lighting circuits."},{"question":"Where can I buy 5SY6340-7 and how is it quoted?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What compliance documentation does Siemens provide for 5SY6340-7?","answer":"The breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No. 235. It is halogen-free and silicon-free. Standard documentation includes the declaration of conformity and material declarations per RoHS/REACH."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6340-7","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/5SY6340-7 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}}