{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3325-3","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3325-3","canonicalUrl":"https://aoctrl.com/siemens/5SP3325-3","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3325-3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, Miniature circuit breaker, 5SP3325-3, 3-pole, 25 A, E characteristic, 25 kA breaking capacity at 400 V AC.","salesMarkdown":"The Siemens SENTRON 5SP3325-3 is a 3-pole miniature circuit breaker (MCB) with an E tripping characteristic, rated at 25 A and 25 kA breaking capacity at 400 V AC. It is designed as a main miniature circuit breaker for residential buildings and infrastructure applications, per the manufacturer's classification. The E characteristic means it is designed for cable and line protection in installations where inrush currents are moderate — a middle ground between the more common B and C curves, offering a wider magnetic trip threshold that reduces nuisance tripping on transformer or capacitive loads while still protecting against short circuits. At elevated ambient temperatures the breaker derates: 23.75 A at 40 °C, 23.125 A at 45 °C, 22.5 A at 50 °C, and 21.875 A at 55 °C. If your panel runs hot, size the load accordingly — the 25 A nameplate applies only up to 30 °C. The 25 kA breaking capacity at 400 V AC (per EN 60898) means this breaker can safely interrupt a fault current up to 25,000 A without welding its contacts or failing catastrophically. That is a high-interrupting rating for a residential/infrastructure MCB — suitable for installations with high prospective short-circuit current, such as near a transformer substation. This is not a downstream sub-panel device; it belongs at the origin of the installation. The breaker occupies 4.5 modular width units (MWUs) — at 18 mm per MWU, that is 81 mm of rail space. Plan your enclosure layout accordingly; this is wider than a standard 1-pole MCB (which takes 1 MWU) because it is a 3-pole unit with a higher interrupting capacity. Dimensions: 128 mm height, 76.3 mm depth (including enclosure depth). Saddle terminals are standard; the infeed can be at the box terminal. The breaker is sealable and lockable via an integrated locking slide, accepting a lock, wire seal, or cable ties — useful for utility metering or tamper-proof installations. For BOM freeze or multi-year project planning, this part carries no imminent obsolescence risk.","metaTitle":"Siemens 5SP3325-3 SENTRON MCB, 25A 3P E-Curve, 25kA","metaDescription":"Siemens 5SP3325-3 SENTRON miniature circuit breaker, 25A rated, 3-pole, E tripping characteristic, 25kA breaking capacity at 400V AC. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76.3 mm","title":"5SP3325-3","Height":"128 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 3-pole, E 25, 400V","Solid Maximum":"50 mm²","Solid Minimum":"2.5 mm²","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"DIN rail","Saddle Terminals":"Yes","Shock Resistance":"30 g, at least 3 impacts, impact duration 11 ms","Stranded Maximum":"50 mm²","Stranded Minimum":"2.5 mm²","at AC rated value":"25 A","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP40, with connected conductors","Overvoltage Category":"IV","Design Of The Product":"Main miniature circuit breaker","at 30 °C rated value":"25 A","at 40 °C rated value":"23.75 A","at 45 °C rated value":"23.125 A","at 50 °C rated value":"22.5 A","at 55 °C rated value":"21.875 A","Depth Of The Enclosure":"76.3 mm","Fastening Method Other":"on DIN rail 35 mm acc. to EN 60715","Infeed At Box Terminal":"Yes","according to EN 61346-2":"F","according to IEC 81346-2":"F","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":"4.5","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"E","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"25 kA","insulation voltage (Ui) rated value":"690 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"6 kV","Display Version For Switch Position Indicator":"OFF = green, ON = red","vibration resistance according to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Mechanical Service Life (Operating Cycles) Typical":"20 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"6.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/08786d06ab1147a718c829d38df287f5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=310744&mlfb=5SP3325-3"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SP3325-3?","answer":"25 kA at 400 V AC, rated per EN 60898. This is a high-interrupting capacity suitable for service-entrance or main-panel applications."},{"question":"What does the E tripping characteristic mean?","answer":"The E curve has a magnetic trip threshold typically between 10x and 20x In, sitting between the C curve (5-10x) and the K curve (10-14x). It is designed for cable protection in circuits with moderate inrush — transformer primaries, capacitive loads, or groups of switching power supplies — where a B or C curve might nuisance-trip on startup."},{"question":"What conductor sizes does the 5SP3325-3 accept?","answer":"Solid conductors from 2.5 mm² to 50 mm², stranded from 2.5 mm² to 50 mm². The saddle terminals handle the full range without adapter lugs."},{"question":"Where can I buy the 5SP3325-3 and what is the lead time?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3325-3","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/5SP3325-3 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}}