{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL7125-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL7125-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL7125-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL7125-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Betagard 5SL7125-7RC, 1-pole miniature circuit breaker, C-curve 25 A, 15 kA (EN 60898) / 20 kA (IEC 60947-2), 240 V AC / 440 V AC max, IP20, 1 MW.","salesMarkdown":"The Siemens 5SL7125-7RC is a Betagard miniature circuit breaker — one pole, C-curve trip characteristic, rated 25 A at 30 °C. The C-curve means it holds through mild inrush — think motor starters, contactor coils, or a bank of relays — and trips fast on a short circuit. Breaking capacity is 15 kA per EN 60898 and 20 kA per IEC 60947-2, so it handles a stiff fault on a 240 V AC single-phase or 440 V AC three-phase line without welding its contacts shut. ## Derating and ambient realities That 25 A rating holds only at 30 °C. At 40 °C it's 23.75 A; at 50 °C it drops to 22.5 A; at 60 °C it's 21.5 A. The breaker can mount in any position, so it tucks into tight gland-plate layouts without worrying about orientation. Width is 18 mm (one modular unit), depth 76 mm, height 90 mm. Installation depth is 70 mm — leaves room behind the DIN rail for wiring.","metaTitle":"Siemens 5SL7125-7RC Betagard MCB, 1P C-curve 25 A, 15 kA","metaDescription":"Siemens 5SL7125-7RC Betagard 1-pole miniature circuit breaker, C-curve 25 A, 15 kA (EN 60898) / 20 kA (IEC 60947-2). Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL7125-7RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240/415 V 1-pole 15 kA C 25","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":"Betagard","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","at AC / rated value":"25 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","at 30 °C / rated value":"25 A","at 40 °C / rated value":"23.75 A","at 45 °C / rated value":"23.25 A","at 50 °C / rated value":"22.5 A","at 55 °C / rated value":"22 A","at 60 °C / rated value":"21.5 A","Suitability For Operation":"Industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"15 kA","acc. to IEC 60947-2 / rated value":"20 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"240 V","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":"440 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/81ae445b9f2f675f44b01f6b413b46d6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646571&mlfb=5SL7125-7RC"},"ai":{"faq":[{"question":"Where can I buy 5SL7125-7RC and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ to get a firm price and lead time."},{"question":"What is the breaking capacity of 5SL7125-7RC?","answer":"15 kA per EN 60898 and 20 kA per IEC 60947-2, at 240 V AC / 440 V AC max."},{"question":"Does 5SL7125-7RC derate at higher ambient temperatures?","answer":"Yes. The 25 A rating is at 30 °C. At 40 °C it's 23.75 A; at 50 °C it's 22.5 A; at 60 °C it's 21.5 A. Size your load to the derated figure for the actual panel temperature."},{"question":"Will 5SL7125-7RC drop into a panel specified around 5SL4120-7CC?","answer":"Both are 1-pole, 18 mm wide DIN-rail MCBs, so the mechanical fit is the same. But 5SL4120-7CC is a B-curve 20 A unit; this 5SL7125-7RC is a C-curve 25 A with higher breaking capacity (15/20 kA vs the 4120's lower ratings). Check the load current and trip curve before swapping — the footprint is identical, but the protection characteristics differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL7125-7RC","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/5SL7125-7RC 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}}