{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL1201-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL1201-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL1201-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL1201-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON series, miniature circuit breaker (MCB), 5SL1201-7MB, 2-pole, C-curve, 1 A rated, 3 kA breaking capacity per IEC 60947-2, 230/400 V AC.","salesMarkdown":"## What the ratings mean for fit The Siemens SENTRON 5SL1201-7MB is a 2-pole miniature circuit breaker rated 1 A with a C-curve tripping characteristic. The C-curve means it trips at 5 to 10 times rated current — designed for moderate inrush loads like small motors, transformers, or lighting circuits where the startup surge exceeds a B-curve but doesn't need the D-curve's wider window. The 3 kA breaking capacity per IEC 60947-2 tells you it can safely interrupt a fault up to 3 kA at 230/400 V AC without welding contacts or cascading failure upstream. That's enough for most residential and light commercial sub-distribution boards; if your panel's prospective short-circuit current (PSCC) exceeds 3 kA, step up to the 10 kA variant in the same SENTRON family. At 36 mm wide (2 modular units), this breaker occupies two standard DIN-rail slots. Mounting position is any, so it fits vertical or horizontal busbars without derating. Depth of 76 mm and installation depth of 70 mm mean it clears most standard enclosure gland plates — check your back panel clearance if you're retrofitting into a shallow box. IP20 with connected conductors is the usual for panel-mounted MCBs; no touch-protection feature on this variant, so it's intended for enclosed distribution boards, not live-front exposed mounting. ## Panel integration notes Snap-on mounting to 35 mm DIN rail per EN 60715. The 2-module width (36 mm) means it pairs neatly with a 1-module auxiliary contact or shunt trip if you need alarm signaling. Sealable design (yes) allows the installer to lock the toggle position with a seal wire — useful for utility metering or tamper-proof circuits. Halogen-free and silicon-free construction matters if this breaker lives in a clean-room or corrosive environment where outgassing could contaminate contacts or optics.","metaTitle":"Siemens 5SL1201-7MB SENTRON MCB, 2P C-curve 1A, 3 kA","metaDescription":"Siemens SENTRON 5SL1201-7MB miniature circuit breaker, 2-pole, C-curve, 1 A rated, 3 kA breaking capacity per IEC 60947-2. Current lifecycle stage. Quoted to order.","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":"5SL1201-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400V 3kA, 2pole, C, 1A","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","at AC / rated value":"1 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","at 30 °C / rated value":"1 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","Product Feature / Touch Protection":"No","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","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"253 V","Mechanical Service Life (Switching Cycles) / Typical":"4 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9f484933637358ad4be189c8b74e33a4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046715&mlfb=5SL1201-7MB"},"ai":{"faq":[{"question":"What is the closest functional alternative to 5SL1201-7MB?","answer":"The 5SL4106-7CC is a 1-pole, 6 A C-curve MCB in the same SENTRON family. It shares the same depth (76 mm) and height (90 mm) but is 18 mm wide (1 module) and offers a 10 kA breaking capacity per EN 60898. It will not drop into a 2-pole slot without rewiring the neutral path — the 5SL1201-7MB switches both poles; the 5SL4106-7CC switches only the line. For a 2-pole replacement at 1 A, stay with the 5SL1201-7MB or its 2-pole siblings in the same series."},{"question":"What compliance documentation does Siemens provide for 5SL1201-7MB?","answer":"The MCB carries a 3 kA breaking capacity rating per IEC 60947-2, overvoltage category III, pollution degree 2. It is designed for residential and infrastructure operation. Siemens typically provides a declaration of conformity (CE/UKCA) and material compliance data (RoHS, REACH) on request — these are available with the order documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL1201-7MB","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/5SL1201-7MB 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}}