{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3850-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3850-2","canonicalUrl":"https://aoctrl.com/siemens/5SP3850-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3850-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3850-2, main miniature circuit breaker, 3-pole, 50 A (at 30 °C), 25 kA breaking capacity, tripping characteristic E, 400 V AC, 4.5 MW.","salesMarkdown":"The Siemens 5SP3850-2 is a SENTRON main miniature circuit breaker — 3-pole, rated 50 A at 30 °C, with a 25 kA breaking capacity per EN 60898. The tripping characteristic E means it's designed for selective coordination — it holds longer on overload than a standard B or C curve, so a downstream fault clears before this breaker trips, keeping power on to the rest of the panel. Rated 400 V AC (insulation voltage 690 V, overvoltage category IV, pollution degree 3) — this is a main breaker for residential and infrastructure panels, not a branch device. The 50 A rating at 30 °C derates to 47.5 A at 40 °C, 46.25 A at 45 °C, 45 A at 50 °C, and 43.75 A at 55 °C; if the panel ambient runs warm, size the load accordingly. Mounts on busbar, occupies 4.5 modular width units. Depth is 89.5 mm, enclosure depth 76.3 mm, height 151.3 mm. Conductor cross-section accepts 2.5 to 50 mm² solid or stranded. IP40 with connected conductors. Sealable (locking slide with lock, additional wire seal, cable ties and Antilux) — utility or inspector can lock the breaker in the off position, preventing unauthorized reclosure. Shock resistance: 30 g, at least 3 impacts, 11 ms duration — survives mechanical shock from door slams or nearby contactors without nuisance tripping. Surge voltage resistance rated 6 kV, appropriate for overvoltage category IV (mains-level transients).","metaTitle":"Siemens 5SP3850-2 SENTRON MCB, 3P 50A 25kA Type E","metaDescription":"Siemens 5SP3850-2 SENTRON main miniature circuit breaker, 3-pole, 50 A rated at 30 °C, 25 kA breaking capacity, tripping characteristic E. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","title":"5SP3850-2","Height":"151.3 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 3x 1-pole, E 50A, 230/400 V Mounting on 40 mm busbars","Number Of Poles":"3","Solid / Maximum":"50 mm²","Solid / Minimum":"2.5 mm²","lifecycle_stage":"current","Fastening Method":"Busbar","Shock Resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product Brand Name":"SENTRON","Stranded / Maximum":"50 mm²","Stranded / Minimum":"2.5 mm²","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"50 A","protection class IP":"IP40, with connected conductors","Overvoltage Category":"IV","Design Of The Product":"Main miniature circuit breaker","Infeed At Box Terminal":"Yes","Number Of Poles / Note":"3P","acc. to DIN EN 61346-2":"F","at 30 °C / rated value":"50 A","at 40 °C / rated value":"47.5 A","at 45 °C / rated value":"46.25 A","at 50 °C / rated value":"45 A","at 55 °C / rated value":"43.75 A","Depth / Of The Enclosure":"76.3 mm","Suitability For Operation":"Residential buildings/infrastructure","Design Of The Locking Device":"Locking slide with lock, additional wire seal, cable ties and Antilux","Number Of Modular Width Units":"4.5","Tripping Characteristic Class":"E","acc. to EN 60898 / rated value":"25 kA","Position / Of Power Supply Cord":"Stipulated by installation in the lower section of the meter panel","Insulation Voltage / Rated Value":"690 V","supply voltage / at AC / rated value":"400 V","Surge Voltage Resistance / Rated Value":"6 kV","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Fastening Method / Other Installation / Note":"On 40-mm busbar system in compliance with DIN 43870 Part 2","vibration resistance / acc. to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Display Version / For Switch Position Indicator":"OFF = green, ON = red","Mechanical Service Life (Operating Cycles) / Typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/961d57a7c3ac76f40950fe583322d8d6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=353472&mlfb=5SP3850-2"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3850-2","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/5SP3850-2 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}}