{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4303-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4303-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SL4303-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4303-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4303-7CC, miniature circuit breaker, 3-pole, C characteristic, 3 A, 400 V AC, 10 kA breaking capacity per EN 60898, 3 width units.","salesMarkdown":"## Siemens SENTRON 5SL4303-7CC — 3 A, C-curve, 3-pole MCB The Siemens SENTRON 5SL4303-7CC is a 3-pole miniature circuit breaker rated 3 A at 400 V AC, with a C tripping characteristic and a 10 kA breaking capacity tested to EN 60898. It occupies 3 width units (54 mm) on a DIN rail and is designed for residential and infrastructure branch-circuit protection. The C-curve means the magnetic trip activates at 5 to 10 times rated current — suited for moderate inrush loads like small motors, lighting, and general-purpose circuits where the start-up surge is higher than a resistive load but not extreme. Rated for 50 Hz AC supply, with a multi-phase operating voltage up to 440 V. The 10 kA breaking capacity at 400 V is the standard domestic and light-commercial fault level across most European installations. ## Lifecycle and sourcing posture The 5SL4303-7CC carries a pollution degree 2 rating and overvoltage category III, meeting the requirements for fixed-installation switchgear in residential and commercial panels. ## Panel integration and physical fit Mounts on a standard 35 mm DIN rail in any position. The 54 mm width (3 modular units) and 76 mm depth fit standard distribution boards. Installation depth is 70 mm behind the panel face. IP20 protection with connected conductors — suitable for enclosed distribution boards where the front face is covered. Touch protection is integrated on the terminals. Halogen-free and silicon-free construction, relevant for installations in environments sensitive to outgassing (clean rooms, data centers, or areas with silicone-based sealants). ## Environmental and compliance range Operates from -40 °C to +75 °C ambient, with a maximum 95% humidity at 55 °C. Vibration resistance tested to 50 m/s² at 25 to 150 Hz per IEC 60068-2-6. Sealable design allows the installer to lock the toggle position after commissioning, preventing unauthorized switching.","metaTitle":"Siemens 5SL4303-7CC SENTRON MCB, 3-pole C 3A 10kA","metaDescription":"Siemens SENTRON 5SL4303-7CC miniature circuit breaker, 3-pole, C-curve, 3 A, 400 V AC, 10 kA breaking capacity per EN 60898. Active 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":"5SL4303-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50 Hz","description":"Miniature circuit breaker 400 V 10kA, 3-pole, C, 3A Circuit breaker 400 V 10kA, 3-pole, C, 3A","Halogen-Free":"Yes","Silicon-Free":"Yes","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":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"3","Design Of The Product":"5SL miniature circuit breakers","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","circuit-breaker / Design":"5SL4CC","Suitability For Operation":"Residential buildings/infrastructure","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","operating current / at AC / rated value":"3 A","Influence Of The Surrounding Temperature":"+55 °C, max. 95% humidity","vibration resistance / acc. to IEC 60068-2-6":"50 m/s² at 25 to 150 Hz","with multi-phase operation / at AC / maximum":"440 V","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5b69e2d7e81e2f42b38e770e8cc909de.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=395487&mlfb=5SL4303-7CC"},"ai":{"faq":[{"question":"Where can I buy 5SL4303-7CC and how do I get a price?","answer":"The 5SL4303-7CC is sourced and quoted to order against an RFQ. Submit a request for current pricing and availability — confirmed at quote time."},{"question":"What is the difference between 5SL4303-7CC and 5SL4120-7CC?","answer":"The 5SL4120-7CC is a higher-current variant (12 A vs 3 A) in the same 5SL4CC design family. Both are 3-pole, C-curve, 10 kA, 400 V AC breakers. Panel footprint and wiring are identical — the only difference is the thermal trip rating."},{"question":"Will 5SL4303-7CC drop into a panel specified around 5SL4120-7CC without rewiring?","answer":"Yes, the physical dimensions are identical — both occupy 3 width units (54 mm) with the same depth and mounting. No rewiring or busbar change is needed; only the overcurrent protection rating differs."},{"question":"What compliance documentation does Siemens provide for 5SL4303-7CC?","answer":"Siemens provides standard documentation including CE declaration of conformity to EN 60898, RoHS and REACH compliance statements, and IEC 60068-2-6 vibration test data. The part is designed to meet overvoltage category III and pollution degree 2 per IEC 60947-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4303-7CC","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/5SL4303-7CC 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}}