{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4104-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4104-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4104-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4104-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4104-8 miniature circuit breaker, 1-pole, D-curve, 4 A, 10 kA breaking capacity per EN 60898 / IEC 60947-2, 230/400 V AC, 18 mm width.","salesMarkdown":"## What it is and what the ratings mean The Siemens 5SL4104-8 is a 1-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated 4 A and breaking 10 kA per both EN 60898 and IEC 60947-2. The D-curve means it tolerates high inrush currents — typically 10–20× rated current before instantaneous trip — so it's the right choice for motor circuits, transformers, or other inductive loads that draw a heavy start surge without being a fault. The 10 kA SCCR at 400 V AC tells you it can safely interrupt a short-circuit fault up to that level without welding contacts or cascading upstream; that's standard for residential and light commercial distribution boards, not for high-fault industrial mains. Single-pole construction (1P) means it switches only the phase conductor — use it in single-phase branch circuits or as a phase leg in multi-pole assemblies. The 18 mm width (one modular unit) snaps onto standard DIN rail and leaves room for adjacent breakers or auxiliaries in a crowded panel. ## Where it fits and how it mounts Mounts in any position on standard DIN rail; the 70 mm installation depth and 76 mm overall depth clear most enclosure backplates without interference. IP20 with connected conductors — fine inside a distribution board or control panel that stays dry and clean; not rated for washdown or outdoor exposure. Pollution degree 2 and overvoltage category III confirm it's built for fixed-installation environments where transient overvoltages are controlled by upstream SPDs. Sealable design lets you lock the toggle in the OFF position for lockout/tagout. Halogen-free and silicon-free materials reduce corrosive off-gassing in a fault — relevant for clean rooms or electronics manufacturing lines where silver migration matters. ## What it doesn't do Rated for AC circuits only — the 72 V DC maximum is a derated figure for the D-curve mechanism, not a primary application. If you need DC branch protection at higher voltages, this isn't the breaker. The 10 000 mechanical operating cycles is typical for an MCB in residential/infrastructure service; don't spec it for frequent switching duty where a contactor or motor-protective breaker would live longer.","metaTitle":"Siemens 5SL4104-8 SENTRON MCB, 1P D 4A 10kA","metaDescription":"Siemens 5SL4104-8 SENTRON miniature circuit breaker, 1-pole, D-curve, 4 A, 10 kA breaking capacity per EN 60898 / IEC 60947-2. Active lifecycle, available 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":"5SL4104-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 10kA, 1-pole, D, 4A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","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":"III","Energy Limitation Class":"3","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"10 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","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":"250 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b740b0085421af97c0af69348f11467c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=412252&mlfb=5SL4104-8"},"ai":{"faq":[{"question":"What is the 5SL4104-8 used for?","answer":"It's a 1-pole D-curve miniature circuit breaker rated 4 A with 10 kA breaking capacity, used for protecting branch circuits with high inrush loads — motor starters, small transformers, or lighting banks with electronic ballasts — in residential and light commercial distribution boards."},{"question":"What compliance documentation does the 5SL4104-8 carry?","answer":"It is rated per EN 60898 and IEC 60947-2 for breaking capacity, carries IP20 protection class, and is built with halogen-free and silicon-free materials. For specific compliance certificates (RoHS, REACH, UL), request the manufacturer's declaration with your RFQ."},{"question":"Where can I buy the 5SL4104-8 and how is it quoted?","answer":"The 5SL4104-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4104-8","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/5SL4104-8 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}}