{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3850-2XX31","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3850-2XX31","canonicalUrl":"https://aoctrl.com/siemens/5SP3850-2XX31","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3850-2XX31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3, main miniature circuit breaker (SHU), 3-pole, E tripping characteristic, 50 A rated current, 25 kA breaking capacity per EN 60898, 400 V AC, 50 Hz, busbar mount.","salesMarkdown":"It mounts on a 40-mm busbar system per DIN 43870 Part 2, which is the standard grid for meter cabinets in European utility installations. The E tripping characteristic — rated 50 A at 400 V AC, 50 Hz — means it holds through inrush from transformer magnetizing currents or motor-starting loads better than a B or C curve, while still tripping within the 25 kA rated short-circuit capacity per EN 60898. The solid and stranded conductor range is 2.5 to 50 mm², which covers the full cross-section from a 2.5 mm² meter tail up to a 50 mm² main feeder. The enclosure depth is 76.3 mm, which is the dimension to check for clearance in a shallow meter cabinet. Mechanical service life is 20 000 switching cycles typical. Vibration resistance per IEC 60068-2-6 is 2 g, 20 frequency cycles 5 to 150 Hz; shock resistance is 30 g, at least 3 impacts, 11 ms duration — figures that matter for transport and seismic qualification, not for normal panel operation. ## Integration notes for the meter cabinet Mounting is on a 40-mm busbar system per DIN 43870 Part 2 — not a DIN rail. The breaker occupies 4.5 width units on that busbar. Infeed is via box terminal at the top; outgoing feeder uses spring-loaded terminals. The locking device accepts a locking slide with lock, additional wire seal, cable ties, or Antilux seals — relevant for utility meter-sealing requirements. The switch position indicator shows OFF = green, ON = red. The power supply cord position is stipulated for installation in the lower section of the meter panel per the design.","metaTitle":"Siemens 5SP3850-2XX31 SENTRON MCB, 3P E 50A 25kA","metaDescription":"Siemens 5SP3850-2XX31 SENTRON main miniature circuit breaker, 3-pole, E-curve 50 A, 25 kA breaking capacity per EN 60898. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Solid":"2.5 ... 50 mm²","Maximum":"440 V","Minimum":"110 V","Sealable":"Yes","Stranded":"2.5 ... 50 mm²","Rated Value":"25 kA","Mounting type":"Busbar","During Storage":"-40 ... +70 °C","Number of poles":"3","lifecycle_stage":"current","Shock resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP40, with connected conductors","Overvoltage category":"IV","Design of the product":"Main miniature circuit breaker","Number of width units":"4.5","Infeed at box terminal":"Yes","Number of poles / Note":"3P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Depth / of the enclosure":"76.3 mm","circuit-breaker / Design":"5SP3","Suitability for operation":"Residential buildings/infrastructure","Design of the locking device":"Locking slide with lock, additional wire seal, cable ties and Antilux","Current / at AC / rated value":"50 A","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","Supply voltage frequency / rated value":"50 Hz","Surge voltage resistance / rated value":"6 kV","Mounting type / other installation / Note":"On 40-mm busbar system in compliance with DIN 43870 Part 2","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","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 (switching cycles) / typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=3433&mlfb=5SP3850-2XX31","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SP3850-2XX31/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SP3850-2XX31?","answer":"The rated short-circuit breaking capacity per EN 60898 is 25 kA. This is the maximum prospective fault current the breaker can safely interrupt at its rated voltage."},{"question":"What conductor sizes does the 5SP3850-2XX31 accept?","answer":"Both solid and stranded conductors from 2.5 mm² up to 50 mm² are accepted. This covers typical meter tails through main feeders."},{"question":"Where can I buy the 5SP3850-2XX31 and get current pricing?","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":"How does the 5SP3850-2XX31 compare to the 3VA1110-5MH36-0AA0?","answer":"The 3VA1110-5MH36-0AA0 is a different form factor — it's a 3VA molded-case circuit breaker designed for DIN-rail or screw-mounting in distribution boards, not for 40-mm busbar mounting in meter cabinets. The 5SP3850-2XX31 is purpose-built for the DIN 43870 busbar grid and includes the sealing provisions required for utility metering. They are not drop-in interchangeable without rewiring the mounting system."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3850-2XX31","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/5SP3850-2XX31 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}