{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7305-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7305-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7305-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7305-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7305-7, 3-pole miniature circuit breaker, C-trip characteristic, rated 0.5 A AC, breaking capacity 15 kA per EN 60898 / 50 kA per IEC 60947-2, UL1077 listed.","salesMarkdown":"## Integrator's quick read The Siemens 5SY7305-7 is a 3-pole miniature circuit breaker from the SENTRON family, rated 0.5 A AC with a C-trip characteristic (5–10× In magnetic release). IP20 with conductors connected. The 0.5 A rating is the continuous current at 35 °C; at 60 °C it derates to 0.42 A — if the breaker sits in a warm cabinet, size up one step. The C-curve handles moderate inrush from small transformers or contactor coils without nuisance tripping. Breaking capacity of 50 kA at 400 V AC (IEC 60947-2) gives headroom for high-fault installations; the 15 kA DC rating (per IEC 60947-2) covers battery-backed control circuits. Snap-on DIN rail mount, any orientation. The 54 mm width occupies three 18 mm modular spaces. Combined terminal top and bottom accept supply from either side. Sealable cover option for tamper-proof installations. Halogen-free and silicon-free construction matters in clean-room or food-grade panels where outgassing is a concern.","metaTitle":"Siemens 5SY7305-7 SENTRON MCB, 3P, C-0.5A, 15/50 kA","metaDescription":"Siemens 5SY7305-7 SENTRON miniature circuit breaker, 3-pole, C-curve 0.5 A, breaking capacity 15 kA (EN 60898) / 50 kA (IEC 60947-2), UL1077. Active production, sourced to order ag","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","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":"0.5 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":"0.5 A","at 40 °C rated value":"0.48 A","at 45 °C rated value":"0.46 A","at 50 °C rated value":"0.45 A","at 55 °C rated value":"0.44 A","at 60 °C rated value":"0.42 A","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":"15 kA","according to IEC 60947-2 rated value":"50 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","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":"0.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb4be4d5b5fa96993a8a956bb9a2943b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=238235&mlfb=5SY7305-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7305-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY7305-7 and how do I get a price?","answer":"It is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 5SY7305-7?","answer":"The breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL1077. It is halogen-free and silicon-free."},{"question":"Will 5SY7305-7 drop into a panel specified around 5SY6332-7CC without rewiring?","answer":"Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, so mechanical fit is identical. The key difference is the rating: 5SY7305-7 is 0.5 A C-curve; 5SY6332-7CC is a different rating/curve. Verify the branch circuit's ampacity and coordination study before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7305-7","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/5SY7305-7 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}}