{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL5250-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL5250-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL5250-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL5250-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SL5250-7RC, miniature circuit breaker, 440 V DC, 10 kA, 2-pole, C-curve 50 A.","salesMarkdown":"## DC-rated MCB for 440 V rail systems The Siemens 5SL5250-7RC is a 2-pole miniature circuit breaker rated for 440 V DC with a 10 kA breaking capacity and a C-curve trip characteristic at 50 A. This is a DC-specific device, not a standard AC MCB — the arc extinction and contact gap are designed for DC commutation, which matters when protecting battery banks, rectifier outputs, or DC bus feeds in industrial control panels. At 50 A rated current it covers a 10–15 kW DC load at 440 V, typical for a string of power supplies or a section of a DC distribution board. ## Integration into a DC distribution panel The 2-pole form factor occupies two DIN-rail module widths (36 mm). Terminals accept 0.5–25 mm² conductors, and the busbar comb can be fed from either pole. For DC applications, both poles must be switched — the 5SL5250-7RC breaks both lines simultaneously, which is required by IEC 60947-2 for DC isolation. Coordination with upstream fuses or a larger MCCB should be verified per the selectivity tables in the Siemens 5SL application manual.","metaTitle":"Siemens 5SL5250-7RC Miniature Circuit Breaker, 440V DC, 10kA","metaDescription":"Siemens 5SL5250-7RC miniature circuit breaker, 440V DC, 10kA breaking capacity, 2-pole, C-curve 50A. Current production lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"title":"5SL5250-7RC","description":"Miniature circuit-breaker 440 V DC DC 10 kA 2-pole C 50","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/502e772d052c0c353e5bfe66978c5bba.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=654129&mlfb=5SL5250-7RC"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL5250-7RC at 440 V DC?","answer":"The 5SL5250-7RC is rated for 10 kA breaking capacity at 440 V DC, which covers most industrial DC distribution bus faults up to that level."},{"question":"Where can I buy the 5SL5250-7RC?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What does the C-curve mean on this DC MCB?","answer":"The C-curve trips magnetically at 5 to 10 times the rated current (250–500 A for the 50 A version), making it suitable for loads with moderate inrush such as DC contactor coils, solenoid banks, and small drive DC links."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL5250-7RC","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/5SL5250-7RC 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}}