{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3450-3","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3450-3","canonicalUrl":"https://aoctrl.com/siemens/5SP3450-3","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3450-3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3450-3, 4-pole miniature circuit breaker, 50 A rated at 400 V AC, 25 kA breaking capacity (EN 60898), characteristic E, 6 MW, standard rail mount, IP40.","salesMarkdown":"Characteristic E is the tripping curve here — it's a delayed thermal-magnetic release designed for circuits with moderate inrush, like groups of fluorescent lighting or small transformers. At 40 °C it derates to 47.5 A, at 50 °C to 45 A. Snap-on standard rail (DIN rail) mounting. 6 modular width units (MW) wide — that's about 108 mm on the rail. The 128 mm height and 76.3 mm depth fit a standard distribution board depth; the depth figure is the body only, not including the handle throw or conductor bend radius. Terminals accept solid or stranded copper from 2.5 mm² up to 50 mm² — covers the range from a 6 mm² subfeed to the 35 mm² or 50 mm² main feeder. Saddle terminals and box-terminal infeed are both present; the locking device (integrated slide, lockable with a padlock, wire seal, or cable tie) is useful for utility-metering or safety-disconnect applications where unauthorized operation must be prevented. Sealable, per the evidence — the enclosure can be sealed to prevent tampering, which is often a requirement for revenue-metering or landlord sub-metering installations. Shock resistance is rated at 30 g for at least 3 impacts of 11 ms duration — that's the mechanical robustness for transport and seismic events, not a continuous vibration spec. For applications with sustained vibration (near a large motor or compressor), you'd want additional dampening or a different mounting method.","metaTitle":"Siemens 5SP3450-3 SENTRON MCB, 4P, 50A, 25kA, Char E","metaDescription":"Siemens 5SP3450-3 SENTRON miniature circuit breaker, 4-pole, 50 A rated, 25 kA breaking capacity per EN 60898, characteristic E. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76.3 mm","title":"5SP3450-3","Height":"128 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 4-pole, E 50, 400V","Number Of Poles":"4","Solid / Maximum":"50 mm²","Solid / Minimum":"2.5 mm²","lifecycle_stage":"current","Fastening Method":"standard rail","Saddle Terminals":"Yes","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","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":"Integrated locking slide, lockable by means of a lock, wire seal and cable ties","Number Of Modular Width Units":"6","Tripping Characteristic Class":"E","acc. to EN 60898 / rated value":"25 kA","Position / Of Power Supply Cord":"Any","supply voltage / at AC / rated value":"400 V","insulation voltage (Ui) / rated value":"690 V","Surge Voltage Resistance / Rated Value":"6 kV","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/55245f3ea6c2a2fe2a2452dcfb3c53d3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=138409&mlfb=5SP3450-3"},"ai":{"faq":[{"question":"Where can I buy 5SP3450-3 and how do I get a price?","answer":"The 5SP3450-3 is sourced and quoted to order against an RFQ through our independent distribution channel. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SP3450-3?","answer":"The rated breaking capacity is 25 kA per EN 60898 at 400 V AC. This is the maximum fault current it can safely interrupt."},{"question":"What conductor sizes does the 5SP3450-3 accept?","answer":"Solid conductors from 2.5 mm² to 50 mm², and stranded conductors from 2.5 mm² to 50 mm². Saddle terminals are provided."},{"question":"What is the temperature derating for 5SP3450-3?","answer":"Rated 50 A 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. Size your continuous load against the ambient temperature in the enclosure."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3450-3","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/5SP3450-3 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}}