{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4125-0RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4125-0RC","canonicalUrl":"https://aoctrl.com/siemens/5SL4125-0RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4125-0RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Betagard 5SL4125-0RC, miniature circuit breaker, 1-pole, 25 A, Z characteristic, 10 kA breaking capacity per EN 60898.","salesMarkdown":"Siemens Betagard 5SL4125-0RC is a 1-pole miniature circuit breaker rated 25 A at AC with a Z tripping characteristic and a 10 kA breaking capacity per EN 60898. Z curve trips fast on low-level overcurrents — it's meant for semiconductor or sensitive electronic loads where standard B/C curves would let too much energy through before opening. Snaps onto DIN rail, takes 1 modular width (18 mm), and can mount in any position. ## Temperature derating and voltage limits At 30 °C ambient the breaker carries 28 A; at 40 °C it's 26.5 A; at 50 °C it's back to 25 A; at 60 °C it's 23.4 A. Single-phase AC rating is 440 V; multi-phase AC rating is also 440 V. DC rating maxes at 72 V — so for a 48 VDC control bus it's fine, but not for a 125 VDC battery string. IP20 with connected conductors — protected against finger touch but not water ingress. Pollution degree 2, overvoltage category III, vibration resistance 50 m/s² at 25 to 150 Hz per IEC 60068-2-6. Halogen-free and silicon-free, sealable, touch-protected terminals. Fits standard 18 mm DIN-rail slot.","metaTitle":"Siemens Betagard 5SL4125-0RC MCB, 25 A, 1-pole Z, 10 kA","metaDescription":"Siemens Betagard 5SL4125-0RC miniature circuit breaker, 25 A, 1-pole, Z characteristic, 10 kA breaking capacity per EN 60898. Current production. Quoted to order.","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":"5SL4125-0RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature Circuit Breaker 25A 1-pole Z characteristic 10kA","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","acc. to IEC 81346-2":"F","at AC / rated value":"25 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","acc. to DIN EN 61346-2":"F","at 30 °C / rated value":"28 A","at 40 °C / rated value":"26.5 A","at 45 °C / rated value":"25.8 A","at 50 °C / rated value":"25 A","at 55 °C / rated value":"24.2 A","at 60 °C / rated value":"23.4 A","Number Of Modular Width Units":"1","Tripping Characteristic Class":"Z","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","Type Of Voltage / Of The Operating Voltage":"AC","vibration resistance / acc. to IEC 60068-2-6":"50 m/s² at 25 to 150 Hz","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/969d2a03ff948cc8b48940093bb94601.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1502363&mlfb=5SL4125-0RC"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL4125-0RC?","answer":"10 kA per EN 60898 at 230/400 V AC."},{"question":"What is the Z characteristic used for?","answer":"Z curve trips between 2 and 3 times rated current, faster than B or C curves — intended for semiconductor protection and sensitive electronic loads where short-circuit current must be interrupted before the devices can be damaged."},{"question":"Where can I buy 5SL4125-0RC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"Will 5SL4125-0RC drop into a panel specified around 5SL4120-7CC?","answer":"Both are 1-pole Siemens MCBs on the same DIN-rail footprint (18 mm width, 1 modular unit). The difference is the rating and characteristic: 5SL4125-0RC is 25 A Z curve; 5SL4120-7CC is 20 A C curve. If the panel wiring and load calcs allow a 25 A Z breaker and the Z curve's faster trip is acceptable, mechanically it fits without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4125-0RC","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/5SL4125-0RC 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}}