{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5104-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5104-6","canonicalUrl":"https://aoctrl.com/siemens/5SY5104-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5104-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5104-6, 1-pole miniature circuit breaker, B tripping characteristic, 4 A rated current, 10 kA breaking capacity per IEC/EN 60898-2 and UL1077, 1 modular width unit.","salesMarkdown":"## What this MCB does The Siemens 5SY5104-6 is a 1-pole miniature circuit breaker from the SENTRON series, rated 4 A with a B tripping characteristic. It breaks fault currents up to 10 kA per IEC/EN 60898-2 and UL1077, so it clears a short circuit before downstream wiring or equipment takes thermal damage. The single modular width (18 mm) snaps onto a DIN rail via the quick-assembly system and occupies one slot in a distribution board — no extra space for neutral switching, since this pole does not switch the neutral conductor. ## B-curve tripping and thermal derating The B characteristic trips between 3 and 5 times rated current — the standard choice for resistive and general-purpose loads where inrush is modest. At 35 °C ambient the breaker holds 4 A continuously; at 40 °C it derates to 3.76 A, at 50 °C to 3.5 A, and at 60 °C to 3.22 A (–). That derating curve means a panel running at 50 °C ambient should treat this as a 3.5 A device, not 4 A, to avoid nuisance tripping on a warm bus. ## Mounting and integration The 5SY5104-6 mounts in any position on a DIN rail. Installation depth is 70 mm; overall depth is 76 mm. Combined terminals at top and bottom accept wiring without reorienting the breaker. The housing is halogen-free and silicon-free — relevant for panels in clean rooms or environments where outgassing must be minimized. Sealable with a lockable cover if the specification requires tamper-proofing. Pollution degree 3 and overvoltage category III suit it for fixed installations inside an enclosure, not for wet or outdoor locations (IP20 only with connected conductors).","metaTitle":"Siemens 5SY5104-6 SENTRON MCB, 1P, B Curve, 4 A, 10 kA, 1 MW","metaDescription":"Siemens 5SY5104-6 SENTRON miniature circuit breaker, 1-pole, B characteristic, 4 A rated, 10 kA breaking capacity per IEC/EN 60898-2 and UL1077. Active production, sourced to order","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SY5104-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-2, UL1077","description":"Circuit breaker Universal current 220 V DC 230/400 V AC 10kA, 1-pole, B, 4 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"4 A","at DC rated value":"220 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","at 35 °C rated value":"4 A","at 40 °C rated value":"3.76 A","at 45 °C rated value":"3.63 A","at 50 °C rated value":"3.5 A","at 55 °C rated value":"3.36 A","at 60 °C rated value":"3.22 A","Energy Limitation Class":"3","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"universal current","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"AC as required, observe DC polarity","Tripping Characteristic Class":"B","at DC according to EN 60898-2":"10 kA","according to EN 60898 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/DC","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":"250 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","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":"1.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a4478ceda1780a0af2e2c2c3f0ca5399.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=230078&mlfb=5SY5104-6"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 5SY5104-6?","answer":"The breaker is certified to IEC/EN 60898-2 and UL1077. It is halogen-free and silicon-free, which supports RoHS and REACH compliance statements from the manufacturer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5104-6","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/5SY5104-6 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}}