{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL1204-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL1204-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL1204-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL1204-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL1204-7MB miniature circuit breaker, 2-pole, C-curve, 4 A rated current, 3 kA breaking capacity per IEC 60947-2, 230/400 V AC, 50/60 Hz, 2 MW, 36 mm wide.","salesMarkdown":"## Siemens 5SL1204-7MB SENTRON MCB — 2-pole C-curve 4 A, 3 kA The Siemens 5SL1204-7MB is a 2-pole miniature circuit breaker from the SENTRON series, rated at 4 A with a C tripping characteristic. It provides overcurrent and short-circuit protection for final circuits in residential and infrastructure installations, per IEC 60947-2 with a 3 kA breaking capacity at 230/400 V AC, 50/60 Hz. The C-curve trips between 5 and 10 times rated current (20–40 A), making it suitable for circuits with moderate inrush — lighting banks, general-purpose socket outlets, and small motor loads where the starting surge stays within that window. Occupying 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and installation depth of 70 mm, it fits standard distribution boards. Rated operational voltage: 230 V AC single-phase (253 V max) or 400 V AC multi-phase (440 V max). The 50/60 Hz frequency range covers standard mains supplies globally. For DC applications, the maximum DC voltage is 72 V — this is not a general-purpose DC breaker for higher voltages. For residential panels typically fed by a 6 kA or 10 kA upstream breaker, this 3 kA unit is suited for sub-distribution or final circuits where the fault level is known to be lower — always confirm the available fault current at the breaker location. Mechanical service life: 4,000 operating cycles typical. Halogen-free and silicon-free construction.","metaTitle":"Siemens 5SL1204-7MB SENTRON MCB, 2P C 4A 3kA","metaDescription":"Siemens 5SL1204-7MB SENTRON miniature circuit breaker, 2-pole, C-curve, 4 A, 3 kA breaking capacity per IEC 60947-2. 230/400 V AC, 50/60 Hz. 2 MW, 36 mm wide. Active production, av","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SL1204-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400V 3kA, 2pole, C, 4A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","supply voltage at AC rated value":"230 V","according to IEC 60947-2 rated value":"3 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":"253 V","vibration resistance according to IEC 60068-2-6":"no","Mechanical Service Life (Operating Cycles) Typical":"4 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a90813a8e0ae83ffbe862c90a2081684.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046717&mlfb=5SL1204-7MB"},"ai":{"faq":[{"question":"What is the width of the 5SL1204-7MB?","answer":"36 mm, which corresponds to 2 modular width units on a standard DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL1204-7MB","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/5SL1204-7MB 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}}