{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3125-6MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3125-6MB","canonicalUrl":"https://aoctrl.com/siemens/5SL3125-6MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3125-6MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL miniature circuit breaker, 5SL3125-6MB, 1-pole, B tripping characteristic, 25 A rated current, 4.5 kA breaking capacity per EN 60898, 400 V AC, 18 mm wide.","salesMarkdown":"B-curve tripping (3–5× In) means this breaker holds through modest inrush — think lighting, resistive heaters, general-purpose outlets — but will nuisance-trip on motor-start surges. If the load has a motor or transformer inrush, step to a C-curve sibling. Rated 25 A continuous at 400 V AC. Also carries 250 V AC single-phase rating. The 440 V max multi-phase rating covers 3-phase line-to-line applications. At 50 Hz only. Mount in any position. IP20 with conductors connected, so it belongs inside a closed enclosure, not in a wet location. Sealable and touch-protected. No neutral switching function — this pole breaks the phase only.","metaTitle":"Siemens 5SL3125-6MB MCB, 1P, B Curve, 25 A, 4.5 kA","metaDescription":"Siemens SENTRON 5SL3125-6MB miniature circuit breaker, 1-pole, B characteristic, 25 A, 4.5 kA breaking capacity per EN 60898. Active production. Sourced to order against RFQ.","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":"5SL3125-6MB","Height":"90 mm","Maximum":"25 mm²","Minimum":"0.75 mm²","Sealable":"Yes","Rated Value":"50 Hz","description":"Miniature circuit breaker 230/400 V 4.5 kA, 1-pole, B, 25A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number of poles":"1","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"5SL miniature circuit breakers","Number of width units":"1","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SL3","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"25 A","Tripping characteristic class":"B","acc. to EN 60898 / rated value":"4.5 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","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","with single-phase operation / at AC / rated value":"250 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4bd27377002d3a0363a4fa05e70a7c25.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=268191&mlfb=5SL3125-6MB"},"ai":{"faq":[{"question":"Will the 5SL3125-6MB drop into a panel wired for the 5SL3120-6MB?","answer":"Yes — same 18 mm width, same depth, same terminal range (0.75–25 mm²). The only difference is the current rating: 25 A vs 20 A. No rewiring needed, but verify the load protection coordination matches the new rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3125-6MB","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/5SL3125-6MB 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}}